Up until now, the 6-bit
coding has not been available for the Leica APO-Telyt-M 135mm f/3.4 ASPH. All previously sold lenses were delivered
without this coding and there was no option to have this done at a later
date. However, Leica just announced that
this is finally available after January 15, 2013.
If the lens was purchased
AFTER September 1, 2006, Leica will charge $200 for the coding. If the lens was
purchased BEFORE September 1, 2006 the cost of coding will be $300. Any lens
purchased after September 1, 2012 will be coded free of charge.
In addition to the 6-bit
coding, Leica is also offering the ability to purchase an 18 month certified
pre-owned warranty for $50. The certification is valid for 18 months from the
time of conversion and includes all lens functions tested on factory equipment
and complete cleaning of the external surfaces of the lens.
According to Leica, the 6-bit
coding has the following advantages:
All Leica M-lenses leaving
the factory are equipped with a code on the bayonet ring which enables the
digital Leica M camera to recognise the lens type. The information on the lens
that is being used helps the camera to optimise image quality. Lenses in the
current range as well as many earlier models can be retrofitted (at the cost of
the owner) to benefit from the image optimisation in the camera. The lenses are
compatible with the digital M camera even without retrofitting, except that the
additional features cannot be used.
The lens coding is called
‘6-bit coding‘ because six fields in the bayonet ring are marked in black or
white to represent a number from 1 to 64 in binary code. The digital M camera
reads this information optically and can identify the lens on the basis of this
code. Apart from the improvement in image quality, this information is also
written into the EXIF image file.
Many of the lenses made from
1963 onwards can be converted. A list of such models is available in the PDF
document "M Lens Coding List". Please ask either your authorised
Leica dealer or Customer Care in Solms to perform the update. The latter will
be happy to inform you on this subject. Customer Care is available at the phone
number +49 (0)6442 208-189.
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