Thursday, October 3, 2013

NEW LEICA ACCESSORIES "MADE IN GERMANY"


Leica Camera AG, Solms, has expanded its product portfolio and now offers premium-quality accessories ‘Made in Germany’.

The new products include the two easy-to-use Leica 24/38 ball heads with numerous additional features. Both are ideal for use with all Leica cameras – from compacts to X- and M-System products. They guarantee that the camera is held securely and steadily in all photographic situations and are particularly useful when frequently changing the camera position and shooting from several different angles. Also new is a compact, lightweight carbon tripod with dimensions that make it perfect for travelling. These new products are further complemented by a set of three quick-change plates for use with the Leica 24 and 38 ball heads. These make it possible to switch between several cameras in rapid succession without any need to exchange the plate. All of these new products are the result of a well-thought-out design and development concept. The use of optimally harmonised materials ensures an ideal symbiosis of stability and low weight and thus guarantees many years of reliable service.


Cabon Traveler Tripod


This new traveller tripod - with the absolute best "Made in Germany" seal of approval - is an impressive piece, not only due to its pure Leica design: the three tripod legs ensure stable placement in any situation and offer simple and flexible usage. Eight layers of top-quality carbon fibers guarantee maximum stability, and with a weight of merely 1.2 kg, the Leica Traveller Tripod is as light as a feather.

The Leica Traveller Tripod is also easy to use, even when shooting at floor level and without a center column. When collapsed, it's especially small and handy. A 1/4" to 3/8" screw adapter is included. Also available: the Concurda carrying bag with carrying strap and shoulder plate for your outdoor activities.



Ball Head 24  


The Ball Head 24 is one of the smallest tripod heads which has ever been developed by Leica. Naturally "made in Germany," this ball head distinguishes itself from the rest with its silky soft ball bearings and absolutely fluid movement. This is made possible by the unbelievably smooth brass sliding properties. What's more, for its small size, this ball head is able to support up to an impressive 12 kg!


Ball Head 38


The unique functions of the Ball Head 38 for the Leica Travel Tripod make this piece truly stand out above the rest. With the press of the TILT-button, it turns into a tilting video head that can be moved in a 2-way tilting motion while resting on a level plane. In the panorama function, the Ball Head is locked in place at 15-degree intervals, granting you simple and flawless 360-degree recordings. The Ball Head is soft and smooth thanks to its brass sliding properties. With the ability to carry up to 24 kg, this Ball Head has truly earned the right to its title, "Made in Germany."

Optional Accessories

For the Ball Heads 24 and 38, an additional removable disc triple pack is available. The removable discs are some of the world's smallest camera discs, perfectly attuned to the Ball Heads 24 and 38 in combination with the Leica Travel Tripod. Each disc is made of the highest-strength aluminum, and the large supporting surface guarantees secure hold. Now you don't have to unscrew the quick release plate each time you switch your camera.



Wednesday, October 2, 2013

New: LEICA ELMARIT-S 1:2,8/45 mm ASPH



Solms, Germany, 1 October 2013: Further defining the S-System as the ultimate solution for the most demanding professionals, Leica Camera AG has unveiled a new wide-angle lens, the Leica Elmarit-S 45 mm f/2.8 ASPH. Attaining class-leading critical levels of performance in all measurable areas, the Leica Elmarit-S 45 mm f/2.8 ASPH. sets new standards for wide-angle focal lengths in the medium format category. With this addition, the lens portfolio for the Leica S medium format system is now comprised of nine lenses (six of which are also available in a CS variant) with focal lengths ranging from 24 mm to 180 mm, assuring uncompromising imaging quality in almost all situations. Leica is also offering firmware updates FW 2.3.0.0 for the Leica S and FW 1.3.0.0 for the Leica S2 and S2-P, ensuring the optimum functionality of this new lens.The equivalent angle of view of the Leica Elmarit-S 45 mm f/2.8 ASPH. corresponds to that of a classic 35 mm lens for 35 mm photography. Its moderate wide-angle with neutral reproduction of perspectives makes this versatile lens not only ideal for landscapes and architectural photography, but also in the studio or on location. At the same time, the Leica Elmarit-S 45 mm f/2.8 ASPH.’s fast maximum aperture of f/2.8 makes it an optimal tool for available-light photography and the conscious use of selective planes of focus. Thanks to its brilliant colour rendition and outstanding imaging performance from the closest focus to infinity at all apertures, the Leica Elmarit-S 45 mm f/2.8 ASPH. guarantees perfect results in any photographic situation.


The Leica Elmarit-S 45 mm f/2.8 ASPH. was developed to meet the stringent demands that professional users place on a camera system in their everyday photographic work and guarantees superior image quality. It offers maximum contrast rendition, highest resolution and extremely low distortion, even wide open. This lens also offers excellent control of flare to ensure high-contrast images, even when shooting a backlit subject. This results from its extremely elaborate optical design and construction: A total of twelve lenses are employed to achieve the Leica Elmarit-S 45 mm f/2.8 ASPH.’s exceptional optical performance. Three lenses made from glass with anomalous partial dispersion minimise chromatic aberrations, and two further lenses are manufactured from glass with particularly low dispersion. An additional lens element with an aspherical surface minimises monochromatic aberrations. Rear-group focusing guarantees consistently outstanding imaging properties from infinity to its closest focusing distance.


As with all Leica S-System products, the Leica Elmarit-S 45 mm f/2.8 ASPH. is rugged and reliable, and designed to offer a particularly long operational lifespan. Ensuring absolute dependability, even under the harshest shooting conditions, the lens features an extremely robust bayonet mount and is fully sealed against dust and spray.



Tuesday, October 1, 2013

MORE NIKON LEICA COPIES



It is a known fact that Nikon got its start by copying Leitz and Zeiss lenses and later cameras to enter the photographic market.  The upcoming WestLicht auction in Vienna shows another example of Leica tech used by Nikon.

 
Nikon Stereo Nikkor 35mm f/3.5

The Nikon Stereo-Nikkor 35mm f/3.5 outfit consisted of a stereo lens and stereo prism for the Nikon rangefinder cameras.  Introduced in 1956, it bears more than a close resemblance to the Leitz Stereoly, first introduced in 1931 and later replaced by an improved model in 1954.

File:B11.JPG
Patent drawing of the Leitz Stereoly attachment

Image of Leica 11
Leitz Stereoly on early Leica II

Leitz 33mm f/3.5 Stemar

In either case, this stereo equipment produced two half frame stereo images in place of the standard 35mm frame.  Stereo viewers and projector accessories allowed for stereo viewing of the images taken.


Thus we have another example of the influence Leica has had on other manufacturers over the years.  Leica cameras and accessories remain the most copied photographic equipment in history. 



For more on the Leica Nikon connection go to:

LEICA TECH IN NIKON CAMERAS

LEICA COPIES




Tuesday, September 24, 2013

LEICAS AT THE 24th WESTLICHT AUCTION



On November 23, WestLicht of Vienna will once again offer a variety of rare camera equipment for auction.  These will of course include some rare and unique Leica items.

WestLicht is known to have set several records.  A Leica 0 series camera was sold for the sensational price of 2.16 million euros, and last November the legendary M3D was sold for 1.68 million euros and is now the most expensive camera from a serial production ever.

Here are some of the highlight of the Leica equipment that will be offered:


leica_imod_cluxus

Leica I Mod. ‘C Luxus’

Opening Bid: 90,000 EUR
Estimate: 150,000-200,000 EUR

The Leica I Mod. C ‘Luxus’ is in 100% original and fine condition.
The camera with gold-plated metal parts and lizard skin body was never restored and has the typical patina.
Only 95 ‘Luxus’ cameras were produced from 1929 to 1931.


leica_iiif_500000

Leica IIIf No. 500000

Opening Bid: 120.000 EUR
Estimate: 200,000-250,000 EUR

Westlicht will also sell the famous presentation camera for Dr. Ernst Leitz II.
The camera is in good original condition, with matching Elmar 3.5/5cm, was exhibited in the Leitz Museum (with original red museum sticker ‘M 163′ on base plate) and was part of the Surat Collection
Year: 1950
Serialnumber: 500000


leica_m3_chrom_1000000

Leica M3 Chrom No. 1000000

Opening Bid: 200.000 EUR
Estimate: 400,000-500,000 EUR

This famous camera is the ‘One Millionth Leica’. The Leica M3 is in fine original condition, with matching and mint CF Summicron 2/50mm. It was exhibited in the Leitz Museum (with original yellow museum sticker ‘M 964′ on base plate) and was part of the Surat Collection.
Year: 1960
Serialnumber: 1000000


leica_m3_chrom

Leica M3 chrom ‘Leica Technik’

Opening Bid: 80,000 EUR
Estimate: 150,000-200,000 EUR

Outfit including very early M3 body no.700051 in original condition, engraved ‘Leica Technik 57′ on rear of top plate.
Offered with 3 prototype lenses:
Rigid Summicron 2/50 no.000345
M3 Summicron 2/35 no.000263
Elmarit 2.8/90 no.000270
(all prototype lenses in fine condition with caps).
This was the personal camera outfit of Theo Kisselbach, directly purchased by the current owner in 1966!
Year: 1953
Serial no.:700051

Westlicht Catalogue


The complete and detailed catalogues to this auction will be published 4-5 weeks prior to the auction date.



Friday, September 20, 2013

LEICA CAMERA AG NOMINATED AS "ENTRPRENEUR OF THE YEAR."


 Solms (ots) - For the 17th time, the accounting and consulting firm Ernst & Young awarded the best medium entrepreneur in Germany "Entrepreneur of the Year" award. From the 58 finalists in five categories, Leica Camera AG went through a rigorous selection process in the consumer goods category and emerged as the winner. The business award was handed over at a ceremony at the Alte Oper in Frankfurt yesterday evening. Dr. Andreas Kaufmann, principal shareholder and Chairman of the Board of Leica Camera AG, and Alfred Schopf, CEO, were also nominated as the German representatives to the international competition "World Entrepreneur of the Year 2014. The award ceremony will take place on 7 June 2014 in Monte Carlo.


Leica-Camera-AG-nominated-as-Entrepreneur-Of-The-Year-in-Germany
The independent jury of renowned industry experts praised their selectiont for the impressive growth rates, the high technological innovation, the efficient organizational structurr, strong customer relationships and the social commitment of the companiy. A key decision criterion of the jury was the willingness to invest and the ability of the company to respond quickly to changing market conditions with innovative products and services.
Alfred Schopf, CEO of Leica Camera AG: "The award shows once again that we have taken the courageous digitization of our products the right way. The potential of the Leica brand and their staff not only lies in the power of innovation, but also in the ability to successfully implement these innovations. It require the contribution of a dedicated and highly qualified staff to which my special thanks go at this point."
Dr. Andreas Kaufmann, principal shareholder and Chairman of the Board of Leica Camera AG: "Entrepreneurship is about taking responsibility and creating value. Short-term sales records and profit per se do not generate lasting value, it requires a high level of technological innovation, investment readiness, social commitment and desire for change.  With a hundred years of heritage the tradition of the Leica brand remains and demands that we are successfully facing the challenges of global markets more than ever."

Monday, September 9, 2013

THE NEW LEICA C



Today Leica Camera Ag introduced the first model of a new line of Leica digital compact cameras, the Leica C.  Small enough to fit in a pocket, the Leica C offers a sophisticated feature package in an impressively stylish design, making it the ideal camera for discerning photographers and aficionados of exquisite design.

Leica-C_light-gold_dark-red-3d-web

An eye-catcher in every respect, the Leica C's impressive technical features are housed in a truly unique body. The camera's slim and stylish form results from the work of Audi Design, who was also commissioned to develop its range of exclusive accessories. A chic color concept that underlines its simple elegance - the Leica C is available in two finishes: 'light gold', a refined combination of gold, ivory and black, and 'dark red', a classic black with burgundy tones. Its collection of innovative accessories in premium materials further highlights the unique look of Leica's new compact camera line.

Featuring a high-performance Leica DC Vario-Summicron zoom lens and an exceptionally large sensor for its class with a resolution of 12.1 megapixels, the Leica C is suitable for almost any photographic occasion and delivers outstanding imaging performance, even in unfavorable lighting conditions. The Leica C is the first Leica compact camera to feature an integrated Wi-Fi and NFC (Near Field Communication) module for the wireless transmission of image data to smartphones and tablet PCs. It also offers a wide range of camera functions, in-camera processing options and an intuitive handling concept for spontaneous photography.

Its Leica DC Vario-Summicron 6–42.8 mm f/2–5.9 ASPH. 7× zoom lens, with a range equivalent to 28 to 200 mm in 35 mm format, is extremely versatile and ideal for almost all photographic situations. The programmable ring around the lens provides even greater creative freedom. From portraits to expansive shots, such as landscapes, the combination of high-precision optics with a large sensor guarantees exceptional imaging performance and pictures with brilliant, natural colors, clarity and contrast. Thanks to its extremely fast autofocus and a continuous-shooting mode with up to ten frames per second, it captures even the smallest details. The serious photographer will be pleased by the inclusion of an integrated LCD viewfinder.




The Leica C's integrated Wi-Fi and NFC (Near Field Connection) module allows the wireless transfer of still pictures and video data to smartphones and tablet PCs via a WLAN connection. To enable this function, users simply have to download the Leica C Image Shuttle app and install it on their iOS or Android end device. By dialling into a WLAN connection, users can activate the data transfer. WLAN and the app also enable remote control of the Leica C from a smartphone or tablet PC, which is particularly useful for remote-release photography and when shooting with the self-timer.

The Leica C's full-HD video function opens up even more creative opportunities. The photographer is always in complete control during exposure and recording thanks to the camera's 3'' monitor. The integrated viewfinder is particularly effective when shooting in bright light. Videos and still pictures can be creatively processed either in the camera or with Adobe® Photoshop® Lightroom®.

Concurrent with the launch of the Leica C, Leica Camera is also extending its service portfolio. This provides particular benefits for Leica C customers, as they can take advantage of a secure image-archiving package as an exclusive starting offer. More details will be announced in the near future.

Leica-C_c-twist


Designed to perfectly complement the elegance of the Leica C, Leica offers a range of innovative and superbly finished, stylish accessories. For example, the Leica C-Clutch, an elegant clutch in light gold or dark red premium Alcantara with a sandblasted metal closer, offers two separate compartments with ample space for the camera and other personal belongings. The collection also includes the Leica C-Twist, C-Snap, C-Case, C-Pouch and C-Wrist Strap.


Technical data LEICA C

Camera type: Leica C (type 112)
Sensor: 1/1.7″ MOS sensor with12.8 MP (effective 12.1 MP)
Lens: Leica DC Vario-Summicron 6–42.8 mm f/2–5.9 ASPH. (equivalent to 28–200 mm in 35 mm format)
Digital zoom: max. 4×
Image stabilizing system: Optical
Shutter system: Electronic and mechanical
Shutter speed range: 250 to 1/4000 s
Exposure modes: Programme (P), aperture priority (A), shutter priority (S), manual (M)
Exposure compensation: (Increments: 1/3 EV steps, range: ±2 EV)
Exposure metering modes: Multi-segment, center-weighted, spot
Flash: Built-in
Monitor: 3.0″ TFT LCD, ~ 921,600 dots, aspect ratio 3:2, shows ~ 100% of the image field
Viewfinder: Color LCD viewfinder (~ 200,000 dots.) with diopter compensation of +/–4 diopters
Microphone/speaker: Stereo/mono
File storage (still/video): Internal memory (~ 87 MB), SD/SDHC/SDXC memory cards
Still pictures: RAW / JPEG (based on Exif 2.3 standard), DPOF-compatible, MPO
Videos (with audio): AVCHD with Dolby® Digital (2-channel) /
MP4 with AAC (2-channel)
Operating temperature / humidity range: 0–40°C / 10–80%
Interfaces: Digital: USB 2.0 (high speed)
Dimensions (W × H × D; lens retracted): approx. 103 × 63 × 28 mm
Weight (with/without memory card and battery): approx. 195 g / 173 g

For more information go to:




Tuesday, September 3, 2013

MEISTERWERKE BERÜHMTER LEICA FOTOGRAFEN IM HESSENPARK




Paul Wolff "Gespiegelte Regenschirme" 1950
Eine Ausstellung im Hessenpark präsentiert rund 60 Meisterwerke aus dem breiten Spektrum von Bildern der  berühmtesten Leica Fotografen, unter anderen: Henri Cartier- Bresson, Barbara Klemm, Robert Lebeck, Inge Morath, Erich Salomon und Dr. Paul Wolff.  Dabei handelt es sich um Schwarzweiß-Aufnahmen mit großem Nuancenreichtum an Halb-und Zwischentönen, von denen eine besondere künstlerische Wirkung ausgeht. Die ausgestellten Fotografien haben häufig auf humorvolle Weise den entscheidenden  Augenblick festgehalten und veranschaulichen auf diese Weise die dynamische Life Fotografie, die mit der Leica begründet wurde. Viele der Bilder haben einen hohen Bekanntheitsgrad und sind zu Klassikern der verschiedenen Fotografen geworden. Ikonengleich haben sich einige von ihnen sogar in unser visuelles Gedächtnis eingeprägt wie Der gestohlene Säbel von Robert Lebeck oder Der Kniefall von Willy Brandt von Hanns Hubmann. Die Aufnahmen entstanden schwerpunktmäßig in der Zeit vor dem Zweiten Weltkrieg und in den 1950er bis 1970er Jahren.



11. August bis 24. November 2013
Haus aus Gemünden (Wohra), Baugruppe Marktplatz
Geöffnet: Mittwochs, Samstags, Sonn- und Feiertags von 10 bis 17 Uhr

http://www.hessenpark.de/index.php?id=404



LEICA X2 MAIL-IN PROMOTION


From Leica Camera comes the announcement of a new mail-in promotion for the Leica X2 camera. With every purchase of a brand new Leica X2, customers will receive the English version of the popular ‘Ninety Nine Years’ book, a $130 value. The book directs an emotional spotlight on 99 years of passion and enthusiasm for a small camera developed by Oskar Barnack in 1913/14. The Leica X2 mail-in promotion starts on September 1, 2013 and runs through October 15, 2013. This promotion is not valid for the Leica X a la carte program or the Leica X Vario. To receive a copy of ‘Ninety Nine Years’, a customer can mail-in a copy of the promotion form, warranty card & copy of sales receipt to Leica Camera Inc.


Terms & Conditions of the Leica X 2 Mail-In Promotion:

> The Leica X 2 Mail-In Promotion is only valid for brand new Leica X2 cameras imported by Leica Camera Inc. and sold through Leica Stores, Boutiques & Dealers in the United States and Canada.
> This Mail-In Promotion cannot be combined with any other offer.
> No other form of payment or substitution will be made by Leica Camera Inc.
> The ‘Ninety Nine Years’ book will be shipped to the name and address (US and Canada only) on the warranty card.
> Leica Camera Inc. will process all mail-in promotions within 6-8 weeks.

> Leica Camera Inc. reserves the right to withdraw, change the terms and conditions of the promotion, etc. at any time.



Monday, August 26, 2013

OPTICAL GLASS FOR PHOTOGRAPHIC LENSES



This article was initially published on this blog on February 27, 2012 under the heading Optical Glasses.  For those interested, it is being republished.

One of the most important substances needed to create photographic images is glass.  It is used in the manufacture of photographic lenses, camera viewfinders, SLR mirrors, filters, negative carriers in enlargers, condensers in enlargers and projectors, slide mounts, and more.  As a matter of fact, photography, as we know it today, would not be possible without glass.

The manufacture of glass was already known to the Egyptians about 3000 BC and was further perfected by the Phoenicians who are credited with the invention of the glass blowpipe.  During Roman times, glass making was elevated to an art form.  Especially the manufacture of highly decorated small glass vessels (fondi d’oro) became very popular.  This culminated in the 13th century in Venice with the manufacture of highly artistic glass items.  Yet even in the 16th century, glass, even window glass, was considered to be a luxury item.  It was also in the 16th century that the first glass lenses appeared in the camera obscura, which was a major step in the development of photography.

According to the dictionary, “glass is a hard, brittle, transparent or translucent, greenish solid solution made by melting a mixture of silica (sand) and various silicates” like soda, borates, phosphates and potash, with metallic oxides added to give the product special properties.  Colorless glass is obtained by adding manganese, which neutralizes traces of iron in the sand.  Different tints are obtained by adding various metallic oxides.  For instance, gold and copper will result in a red color, manganese violet, cobalt blue, iron and chromium green.

Depending on the composition, some glass will melt at temperatures as low as 500° C (900° F), others melt only at 1650° C (3180° F). After careful preparation and measurement, the raw materials are mixed and undergo initial fusion before being subjected to the full heat needed to turn the matter into glass, called vitrification.  In the past, melting was done in clay pots heated in wood or coal-burning furnaces. Pots of fireclay, holding from 0.5 to 1.5 metric tons of glass, are still used when relatively small amounts of glass are needed for handworking. In modern glass plants, most glass is melted in large tank furnaces, first introduced in 1872.  They can hold more than 1000 metric tons of glass and are heated by gas, oil, or electricity. The glass batch is fed continuously into an opening (doghouse) at one end of the tank, and the melted, refined, and conditioned glass is drawn out the other end. In long forehearths, or holding chambers, the molten glass is brought to the correct working temperature, and the mass is then delivered to the forming machines.

The above described methods are useful for the manufacture of all but optical glass. The manufacture of optical glass is a delicate and exacting operation. The raw materials must be of the highest purity, and it takes great care to prevent imperfections to be introduced.  Small air bubbles and residual unvitrified matter will cause distortions in a lens. Striae, the streaks caused by incomplete chemical homogeneity in the glass, will also cause serious distortion, and strains in glass caused by improper annealing will further impair optical qualities.

Annealing is a process of heat treatment by which glass is rendered less brittle and more resistant to fracture. Annealing minimizes internal defects in the atomic structure of the glass and leaves it free from internal stresses that might otherwise be present because of prior processing steps.

Glass is annealed by heating it to high temperatures and then cooling it slowly.  Large masses of glass are cooled within the heating furnace.  Sheets are usually annealed in a continuous-process furnace. They are carried on a moving table through a long chamber in which the temperature is carefully graded from initial heat just below the softening point to that of room temperature at the end. The annealing time varies widely according to the thickness of the individual piece.  Window glass, for example, requires several hours, plate glass, several days, and glass mirrors for reflecting telescopes as well as certain glasses for photographic lenses several months.

Optical glass was originally melted in pots for prolonged periods, during which it was constantly stirred by a refractory rod. After lengthy annealing, the glass was broken into pieces. The best fragments were further reduced, reheated, and pressed into the desired forms. In recent years a method has been adopted for the continuous manufacture of glass in platinum-lined tanks, using platinum-lined stirrers in the cylindrical end chambers (or homogenizers). This process produces greater quantities of optical glass that are cheaper and superior to glass produced by the earlier method.

The principal specifications for optical glasses are its light bending power, or refractive index, for different wavelengths or colors of light and its dispersion, the difference in refractive index for certain wavelengths.  All of us have seen dispersion of light in form of a rainbow from light shining through a prism and being separated in the spectral colors.  Dispersion is one of the most difficult problems to deal with in designing photographic lenses.  Dispersion will introduce chromatic aberration which, when not controlled, will lead to poor sharpness and loss of detail.  The best optical glasses available today display very high refractive indices with relatively low dispersion.  Within the last twenty years some glass manufacturers have succeeded in producing glasses with a peculiar property called anomalous partial dispersion, first pioneered by Leitz in the early 1970s.  Such glasses provide the lens designer with new and powerful means to improve the color correction of chromatic aberrations of camera lenses.  Prior to the availability of glasses with anomalous partial dispersion some manufacturers used calcium fluorite crystals for the manufacture of lens elements in telephoto lenses.  Especially Canon was making wide use of this.  Other manufacturers, however, do not regard them a suitable for photographic lenses because they have very poor shape retention and because their refractive index is only ne1.43.  Because of this relatively low refractive index, lens elements made of calcium fluorite require very strong curvatures.  This has the disadvantage of increasing spherical aberration and causing substantially more surface reflections.

The atlas of optical glasses shows the refractive index and dispersion of many of today’s glasses.  The vertical axis shows the refractive index for a wavelength of 546 nm while the horizontal axis shows the Abbe number (for Professor E. Abbe of Zeiss), or the relative reciprocal dispersion of the glass.  This is a comparison between the refraction of the glass for yellow/green light in the center of the visible spectrum and the difference between its refraction for blue/violet and deep red light.  Please note that these dispersion values are reciprocals:  The higher the Abbe number, the less dispersion.  Sometimes optical engineers need high dispersion numbers, sometimes low ones, to balance the characteristics of different optical glasses in order to produce a high degree of image correction.

The large circled dots indicate glasses used in Leica lenses, the small circled dots indicate Leica glasses not currently in use.  The plain dots indicate glasses from other manufacturers

The advances in glass technology can easily be seen when comparing the refractive indices of glasses over the years.  The Leitz Elmar 50mm f/3.5 from 1926 used SK15 glass with a refractive index of ne1.625, this increased to ne1.694 with LaK9 glass in 1953 with the Summicron 50mm f/2.  In the 1969 Summicron the refractive index had grown to ne1.7479 with LaFN2 glass and the special 900403 glass developed for the 1976 Noctilux 50mm f/1 increased the refractive index to ne1.9005 which, to my knowledge, is the highest refractive index for any glass used for photographic production lenses.  Leitz uses a proprietary number to avoid divulging the make-up of this glass.

It was a long, arduous journey to arrive at the modern glasses at the disposal of today’s lens designers.  Glasses with a relatively high refractive index were available even prior to W.W.II.  However, this could only be achieved by the addition of thorium oxide to the glass.  Thorium oxide unfortunately is highly radioactive, and lens designers began to search for a suitable replacement.  One of the problems encountered was that by replacing the thorium oxide with a variety of other elements, the glass turned opaque.  Kodak had some limited success during W.W.II.  They were able to make a thorium oxide free glass with similar properties, but it was yellow in color.  This glass, however, was used to make lenses for some aerial cameras.  Since these were used exclusively with b&w films, the “built-in” yellow filtering actually was found to be beneficial for this specific use.

At the Leitz glass research laboratory similar experiments started in 1949.  After lengthy experimentation they found that lanthanum oxide offered the best chance for success as a replacement for thorium oxide. They found that glasses could be made with a refractive index of ne1.7.  However, these glasses could not be made in large quantities because they tended to crystallize.  This makes it difficult to prevent crystal grooves, or striae.  Other substances like zirconium oxide, yttrium oxide and tantalum oxide had to be added to produce more stable high refractive glasses in large numbers.  The resulting LaK9 glass resulted in the 50mm f/2 Summicron in 1953, the first production lens free of thorium oxide.  Leitz granted the German Schott company a license to produce the LaK9 glass.

For lenses with a maximum aperture of f/1.4 glasses with a refractive index close to ne1.8 are necessary.  However, these are difficult to produce.  Evaporation at the surface of the molten glass, while the temperature is slowly lowered, can easily cause striae.  These can only be prevented by constant stirring to produce consistent blending of the molten glass.  This requires additional steps, so that one oxide will prevent another from crystallizing.  These methods, for instance, have enabled Leica to use glasses with refractive indices of ne1.80 and ne1.82 and a dispersion value of ny45.  For glasses with refractive indices higher than ne1.8 it is difficult to obtain enough chemicals with sufficient purity at a reasonable cost.  Subsequently such glasses are very expensive.

The glass developed by Leitz for the 50mm f/1 Noctilux is such a glass.  It uses a much higher zirconium oxide content, which allows for a refractive index of ne1.9005 and a dispersion value of ny40.  These glasses have a very high melting point of 1600° C (2912° F).  At such high temperatures molecular migration of the material used for the crucibles can contaminate the glass mixture.  To prevent this, crucibles of platinum or at least platinum lined crucibles are used.  The stirring tools also have to be made either of platinum or must be platinum coated.  In addition, the shape of the stirring tools in relation to the viscosity of the molten glass is very important for the homogenization of the glass.  The temperature of the melt in the crucible has to be lowered considerably before it can be poured out.  Then the poured slabs have to be cooled at a carefully controlled rate, which may last days or even months in order to prevent molecular tension.

As mentioned before, most lens manufacturers don’t consider calcium fluorite suitable for lens production.  Instead they prefer a true glass with an amorphous structure.  It was discovered that fluorites remained stable in metaphosphate suspensions.  By incorporating several fluorites, it is possible to optimize the proportions to avoid the creation of striae during the cooling process.  This eventually led to the development of a true glass with anomalous partial dispersion and a refractive index of greater than ne1.544.  With the addition of titanium oxide Leitz was able to produce a glass with an anomalous partial dispersion value of ny66.6 and a refractive index of ne1.544.  This glass was used in the 180mm f/3.4 Apo Telyt R, originally developed for the U.S. Navy, which to this day ranks as one of the best lenses ever produced for a 35mm camera. Many of the large glass manufacturers have little interest in the manufacture of such exotic glasses because optical glass is only of minor importance to them.  Construction glasses, television tubes, bottles etc. are the main income generators.  When these companies develop optical glasses, they will do it only for those which will be in high demand.  It is the exotic wishes of companies like Leica, Zeiss, Schneider, Rodenstock, Nikon, Canon etc. that these glasses were developed in recent years.


The next time we complain about the high prices of some of the top lenses on the market, we should remember the difficulties encountered in just the manufacture of the glass.  Add to that the great care which has to go into the production of the individual glass elements and the mechanical components of the lens, and the prices somehow don’t seem to be all that high after all.



Tuesday, August 20, 2013

LEICA IN SPACE - A NASA CONNECTION


It is common knowledge that the Hasselblad had been chosen by NASA for their lunar missions.  Many readers here have wondered if Leica has ever been involved with NASA in any form.  I have written about this topic here in the past, but with renewed efforts by private companies to launch new lunar missions in the not too distant future, I feel this topic warrants new attention.

An interesting, but relatively unknown fact is that NASA initially had chosen the Leica MDa as the camera to be used on their lunar missions.  The MDa was basically identical to the M4 except it had no viewfinder or rangefinder.  The camera was meant for work with microscopes or the Visoflex where a built-in viewfinder and rangefinder was not necessary.

By the time the first lunar missions were planned, the Hasselblad had evolved as the main camera for most missions.  The main reason NASA chose the Leica MDa over the Hasselblad was weight.  Of all the systems for the Apollo missions, one could never be tested because of the low gravity of the moon.  That was the take-off module.  To gain as much of a weight advantage as possible, NASA did everything they could to save weight.  That included the camera equipment.  The Leica MDa with 35mm f/1.4 Summilux was definitely lighter than anything Hasselblad had to offer.  Leitz modified several cameras and lenses to feature large levers to allow camera operation with the bulky gloves of the space suits.  The astronauts chosen for the lunar missions all received extensive training in the use of the camera.

Lunar Leica MDa, an off-the-shelf camera with only few modifications.  These appear to be a soft shutter release, a larger shutter speed dial and a large film rewind knob.  Modification of the lens large levers for the aperture and focus settings, all designed for easy operation with the gloves of the space suits

Yet, as is common knowledge, the Leica never made it to the moon.  The credit goes to one NASA engineer who figured out that the interchangeable film backs for the Hasselblad were lighter than the Leica MDa with its Summilux lens.  Subsequently NASA decided to use the Hasselblad after all.  The Saturn 5 rockets had no problem delivering the payload to the moon.  For the return trip it was subsequently decided to remove the film backs from the cameras and to leave the cameras on the moon where they still reside today.  A total of 12 Hasselblad cameras are sitting in the lunar dust, ready to be picked up.

An intriguing question is if they might be still able to operate properly after all these years in the extremely harsh environment of the lunar surface.

But there are more Leica - NASA connections.  One virtually unknown fact is that NASA also used the Leicafelx SL.  For what purpose is unknown at this point.  I have also found that in 1966, NASA ordered 150 Leica cameras.  Unfortunately it was not stated which cameras they were.

The camera appears to be without visible modifications other than the deeply knurled shutter speed dial to accommodate the heavy gloves of the space suits

Another Leica camera was used in conjunction with a spectrograph.  It was used on the Gemini V and VIII missions. Longer missions during the Gemini program gave astronauts more time for scientific experiments, often created and monitored by other government agencies or academic institutions. Scientists at the U.S. Weather Bureau (now NOAA) created this camera attachment so it could simultaneously record a spectrum and an infrared image to determine cloud heights.

The camera appears to be a Leica M3.  It is unknown if any special modifications were necessary for 
this specialized use

A little known fact is that another Leica M3 accompanied the astronauts on a September 1995 Endeavour space shuttle mission.  As reported by the Houston Chronicle…

NASA Photographer Makes History With Trusty Camera

MARK CARREAU Staff

SAT 02/10/1996 HOUSTON CHRONICLE

Odds are that Andrew Patnesky, ""Pat" to his colleagues, has used the vintage Leica camera that swings from his leathery neck like an old dog tag to photograph every American astronaut since Alan Shepard.

It was only fitting that the trademark photo gear with the thick rubber band binding its aging components together accompanied a shuttle crew into orbit recently, something the 75-year-old NASA photographer couldn't do.

"I think the world of that camera," said Patnesky, who shuns more modern gear with the automated features that focus and advance film in favor of the all-manual Leica M3.


"I have other cameras, but they don't measure up," he said. ""Anyone can just go shoot. Anyone can be a photographer, but not everyone can be a photojournalist."

Patnesky fretted over the Leica's absence during its orbital journey aboard the shuttle Endeavour last September. The separation was prolonged for several weeks after the shuttle's return so that the Leica could be unpacked and its journey officially documented.
"I feel kind of naked without it," he joked recently, clearly relieved that the old camera was available once again for his patrols of the space center's astronaut training facilities.

Patnesky staked his claim to the government-owned gear when he spotted it in an equipment closet soon after he joined NASA in 1961. The Johnson Space Center, then known as the Manned Spacecraft Center, was just beginning to take shape in Houston.

"None of the other dingbats would use it. So I said, `Hey, give it to me,' " recalled Patnesky, who spares no one, least of all himself, from his playful verbal digs.

Relying on his 21 years of experience as a photographer with the old U.S. Army Air Corps and then its successor, the Air Force, Patnesky began to chronicle, with the trusty Leica, the personalities who led America to the moon.

In those days, he said, the news media was thirsty for a steady stream of photographs of astronauts as they trained for their Apollo flights in exotic locales, from the Gulf of Mexico where they rehearsed post-splashdown procedures in rough seas to the deserts of Mexico.
During one of the Mexican excursions - it was a training jaunt by Shepard and astronaut Edgar Mitchell to prepare for their Apollo 14 flight - an instructor-geologist challenged Patnesky to descend into a rocky crater for photographs.

As he made his way to the crater floor, Patnesky slipped between the boulders. The Leica's fragile view finder broke away, disappearing between the rocks. Rather than replace the camera, though, he obtained a new view finder and lashed it in place with the first of a succession of wide rubber bands, lending the camera its rag tag character.

To this day Patnesky finds the Leica perfect for his needs, rubber bands and all.
With its precise mechanics and acute optics, the old camera makes little shutter noise and requires no flash when its operator is photographing in the Mission Control Center, the space shuttle simulator or the administrative offices.

"I like to shoot on a noninterference basis," he said. ""That is how you get the best shots."
The strategy has permitted Patnesky to photograph all of the American presidents with astronauts from John Kennedy to Bill Clinton. It allowed him to capture the drama of the Challenger accident as it was reflected in the faces of the personnel in Mission Control, as well as the majesty of Anwar Sadat, the late president of Egypt, during a state visit.

His favorite subjects, though, are the astronauts, from the original Mercury explorers to Neil Armstrong and Buzz Aldrin, the first lunar explorers, and now the shuttle astronauts and their recent Russian cosmonaut guests.

"My friendship with the astronauts means a helluva lot to me. I admire those guys for all the hours they put in," said Patnesky. ""One way or another I've photographed every one of them."

One of 10 children born to a Pennsylvania coal mining family, he commutes 110 miles to work each day from a home north of Houston and shares time with his wife in a second home near San Antonio.

Wiry and healthy, Patnesky will log his 56th complete year of government service on Oct. 1. He is coy about his retirement plans.

But he feels so strongly about his association with the astronauts that he is willing to part with his Leica when he leaves NASA. He wants it to go on display at the Astronaut Hall of Fame, just outside the gates of the Kennedy Space Center in Titusville, Fla.

An even earlier Leica camera, a Leica Ig model, was used by astronaut John H. Glenn, Jr., to take the first human-shots, color still photographs of the Earth during his three-orbit mission on February 20, 1962. Glenn's pictures paved the way for future Earth photography experiments on American human spaceflight missions.


Because Glenn was wearing a spacesuit, complete with helmet during his February 20, 1962 mission, he could not get his eye close to a built-in viewfinder.  Therefore NASA selected the high-quality Leica Ig camera that allowed them to attach a customized viewfinder on top. This special attachment featured a suction cup on the back side to allow Glenn to easily place the device against the visor when he was required to keep it down. The viewfinder was removable when Glenn did not need his visor down, and a velcro strip on the rounded top let him manage its location inside the spacecraft.  Glenn found the camera easy to use, in part because he could exploit the advantages of zero-gravity.

"When I needed both hands, I just let go of the camera and it floated there in front of me," he said in his later memoir.


The 1957 Leica Ig was the last Leica screwmount model made, with production ending in 1963.  It was the successor to the If and is the only screwmount camera with the word 'Leica' engraved on the front of the camera. This camera had the same profile as the IIIg but without the viewfinder/rangefinder incorporated into the top.  As with both the Ic and If there were two accessory shoes mounted for attaching a separate viewfinder and rangefinder. The rewind knob was partially recessed into the top plate.  As with the Ic and the If, the Ig was intended for scientific or Visoflex use.

I will keep on researching the Leica – NASA connection, and as soon as I have anything else to report, I will do so.

Post Script:

Reader Eric Hurtado sent some additional pictures of the lunar Leica from France.



These pictures show additional modifications, an enlarged grip pad on the film advance lever as well as on the lever to open and close the lock for the removable base plate.  The base plate lock is especially interesting since it indicates that it was apparently planned to have the astronauts change film when necessary.  Also visible is the reinforced top plate with an accessory shoe attached and an electronic connection for which there is no explanation.


For additional pictures, in color, please go to:




Thursday, August 8, 2013

NEW PETZVAL LENS



Every once in a while we come across lenses from manufacturers other than Leica which are of definite interest and well worth their use on Leica cameras.  One such lens is the new Petzval lens from Lomography.

The Petzval name is one of the most famous in the history of optics and the development photographic lenses.  It was first introduced in 1840 by Joseph Petzval, a Hungarian mathematician, inventor, and physicist best known for his work in optics.  Photography was just in its infancy, with photographic materials and lenses being very slow.  Especially portraiture was difficult because lenses were very slow in those days. 

Petzval set out to overcome that problem by designing a much faster lens.  When he designed his famous portrait lens in 1840, it constituted a quantum leap in optical design.  The lens had the unheard of aperture of f/3.6.  Petzval's portrait objective lens (Petzval Porträtobjektiv) was an almost distortionless anachromatischer Vierlinser (double achromatic objective lens, with four lenses in three groups). The maximum aperture was substantially higher than the Daguerre standard of 1839, the Wollaston Chevalier lens (f/16). The speed of f/3.6 with a focal length of 160 mm made crucially shorter exposure times possible — using exposures of only about 15 to 30 seconds compared to the 10 minutes previously. Thus, snapshots became possible for the first time.

File:Petzval.png

Petzval allowed the Viennese entrepreneur Peter Wilhelm Friedrich von Voigtländer to produce the lens for a one-time payment of 2,000 guldens, without a patent or a contract, which led later to a lasting controversy between Petzval and Voigtländer. Voigtländer, who had confirmed the process through his own calculations, produced a prototype, and in May 1840 he began production of the lens for the daguerrotype cameras in 1841, making a fortune in the process.

Now Lomography is resurrecting this lens in partnership with Zenit of Kranogorsk, Russia.  The New Petzval Lenses will be manufactured by a team of optics specialists at the Zenit factory. They are built from brass and feature premium glass optics. 

Photos shot with a Petzval lens are immediately recognizable for their super-sharp focus and wonderful swirly bokeh effect at the non-focused areas, including strong color saturation, artful vignettes and narrow depth of field.

The new lens will have a focal length of 85mm with a maximum aperture of f.2.3.  Apertures will be set via Waterhouse stops down to f/16.  The image circle has a diameter of 44mm with a field of view of 30degrees.  The closest focusing distance is 1 meter.

The lens will initially be available for Canon EF and Nikon F DSLR mount cameras.  Either one of these will allow use on the Leica M and Leica Digilux 3 with an adapter.

No word on the availability of the lens yet, but it is definitely an item tyo look out for.

Petzval_lens

Petzval-lens

Petzval_lens_front

Petzval-lens_OLD_VS_NEW
The original Petzval lens (left) and the new version


For more information go to: