tag:blogger.com,1999:blog-1320126156594375642.post4505530377680060450..comments2024-03-27T11:02:08.037-05:00Comments on LEICA Barnack Berek Blog: LEICA ENLARGER LEITZ FOCOMAT V35LEICA Barnack Berek Bloghttp://www.blogger.com/profile/09055435560407011075noreply@blogger.comBlogger15125tag:blogger.com,1999:blog-1320126156594375642.post-70861433486169850872019-08-27T11:56:13.005-05:002019-08-27T11:56:13.005-05:00Yes. I published an article titled "ELCAN HIG...Yes. I published an article titled "ELCAN HIGH RESOLUTION 35mm CAMERA SYSTEM FOR THE US NAVY" on the LEICA Barnack Berek Blog. Go to:http://gmpphoto.blogspot.com/2016/12/leica-high-resolution-35mm-camera.htmlLEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-68770960508162348532019-08-27T11:55:45.114-05:002019-08-27T11:55:45.114-05:00Do you have any more information on the Navy high ...Do you have any more information on the Navy high resolution 35mm Leica system?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-82000829651380220012019-08-27T11:54:37.316-05:002019-08-27T11:54:37.316-05:00I am definitely dusting off my V35.I am definitely dusting off my V35.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-64708042039545067032019-08-27T11:53:12.841-05:002019-08-27T11:53:12.841-05:00No, that credit must be given to the Kodak High Co...No, that credit must be given to the Kodak High Contrast Copy Film. It would resolve in excess of 300 lpm. However, since the film was designed as a high contrast film, essentially rendering just black and white, no grey tones, it did require special developer(s). While these generally did render quite acceptable results, the negatives were in most cases still quite contrasty which definitely rendered less than ideal results when shot under contrasty lighting conditions. For that reason I consider the Agfapan APX 25 the best black and white film of its days.<br />The highest resolution, when combined with special developers, were obtained with some special films from Kodak and Agfa. They were used by the US Navy for their high resolution 35mm system which consisted of Leicaflex cameras and the 35mm Summicron-R and three specially developed ELCAN lenses, one of which later became available as the 180mm f.3.4 Apo Telyt-R. These films rendered resolution levels of 550 and 600 lpm.LEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-71283771007266046682019-08-27T11:51:55.096-05:002019-08-27T11:51:55.096-05:00Was the old Agfapan APX 25 the highest resolving f...Was the old Agfapan APX 25 the highest resolving film?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-55024504164150698012019-08-27T11:51:29.020-05:002019-08-27T11:51:29.020-05:00I have never used stand development for myself, bu...I have never used stand development for myself, but from what I understand, that is definitely the case. However, it does take a lot longer.LEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-4437271210676940872019-08-27T11:51:10.171-05:002019-08-27T11:51:10.171-05:00Doesn't stand development render equally evenl...Doesn't stand development render equally evenly developed results?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-32795478599134706062019-08-27T11:50:39.949-05:002019-08-27T11:50:39.949-05:00I used Jobo developing tanks on a Beseler color ag...I used Jobo developing tanks on a Beseler color agitator. It had the advantage of not only rocking the drum slightly from side to side, it also would reverse the rotational direction after about 2 1/2 revolutions. This rendered by far the most accurate and even agitation. However, keep in mind that the developing times need to be shortened with continuous agitation.LEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-88292155692738385652019-08-27T11:50:07.388-05:002019-08-27T11:50:07.388-05:00What rotary drum system did you use?What rotary drum system did you use?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-4406892570079329022019-08-27T11:49:40.526-05:002019-08-27T11:49:40.526-05:00It was a 50mm f/2 Dual Range Summicron on a Leica ...It was a 50mm f/2 Dual Range Summicron on a Leica M3, using Agfapan APX 25, developed in Agfa Rodinal 1:100 for 16 minutes with continuous (rotary drum) agitation.LEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-71944668612230316672019-08-27T11:49:16.722-05:002019-08-27T11:49:16.722-05:00What lens was it that rendered those incredible re...What lens was it that rendered those incredible results?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-23755926626405788042019-08-27T11:48:51.648-05:002019-08-27T11:48:51.648-05:00That is correct.That is correct.LEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-21058726419324710072019-08-27T11:48:34.436-05:002019-08-27T11:48:34.436-05:00Isn't there some rule of thumb which states th...Isn't there some rule of thumb which states that in an enlargement you lose at least 25 percent of the resolution of the negative? Based on that, the resolution of the negative you mention above would have to have been 175 lpm or more.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-12277192327750546902019-08-27T11:47:59.233-05:002019-08-27T11:47:59.233-05:00That is a very good question. I have prints made o...That is a very good question. I have prints made on the V35, even relatively large ones like 16 x 20. I also have prints made from the same negatives after they were scanned and then run through Photoshop and printed. A close comparison reveals that the V35 has an edge. However, these negatives were scanned and printed almost 20 years ago. Since then scanners and printers have substantially increased in quality and capability. I would not be surprised if these negatives, if scanned with a modern, high quality scanner and then printed on a professional quality Epson printer would not render results equal to the V35.<br />The capabilities of the V35, combined with photos taken with a Leica on fine grain film was clearly shown on an enlargement I made from just a very small portion of the negative. I took a tight head shot of a model and then enlarged just the small, lower eyelashes to a 16 times enlargement. The print showed detail so small that it didn't show up on a full frame 16 x 20 enlargement. Careful measurements revealed that The very fine eye lashes had an approximate Diameter of 0.007mm (0.00028 inch) on the negative which translates to a resolution of over 140 lpm (lines per millimeter) on the enlargement which means that the on-film resolution was even higher.LEICA Barnack Berek Bloghttps://www.blogger.com/profile/09055435560407011075noreply@blogger.comtag:blogger.com,1999:blog-1320126156594375642.post-42346052442136365422019-08-27T11:46:10.043-05:002019-08-27T11:46:10.043-05:00Excellent article. It definitely got me thinking a...Excellent article. It definitely got me thinking about dusting off my V35 and to use it again. I wonder how its results compare to scanned negatives with the results perfected in Photoshop or Lightroom?Anonymousnoreply@blogger.com