6 bit Elmarit 28 code question

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kknox

kknox
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I bought a D-Coder kit from Pop Flash. Works great on most of my lens, when I use the Elmarit 28 2.8 v111 code it shows a 90mm on my M8. I did use the Elmarit 28 asph code and it works. Will it matter that my lens is not an asph version?

Thanks in advance, Merry Christmas.
 
Hi - I assume your 28 Elmarit brings up the 28mm framelines? It would be very odd if it didn't, but it is necessary for this to be correct along with the 6-bit code for the M8 to recognize the lens. Using the coder kit template, it's pretty hard to get the code backwards, but not hard to ink in a code that's not recognized. The black dots have to be sizable and dark, and not glossy (a reflection from a shiny dot could be read as white/blank). Fortunately, you have only two black dots, and they're right next to each other; should be pretty error-free with flat-black paint. Here are the codes for the various 28 Elmarits (1 is black, 0 is white, and the order assumes you're looking at the rear of the lens with it rotated so the coding is at top):

Elmarit-M 28mm f/2.8 (III) 11804; coding is 000011
Elmarit-M 28mm f/2.8 (IV) 11809; coding is 011011
Elmarit-M 28mm f/2.8 ASPH. 11606; coding is 011100 also suggested for Zeiss Biogon T* 2.8/28 ZM, Konica M-Hexanon 28mm f/2.8

There IS a similar 90mm coding... if when coding 000011 you got your left black dot too wide or too far to the left it might be picked up this way:
Summicron-M 90mm f/2 (II) 11136, 11137 coding is 000111
This would be valid because 90mm and 28mm share the same frameline set.
 
Thanks, there is a small screw on the lens mount ring right where the mark goes for the 000011 code. All my other lens code ok, do you think the screw is giving me the false reading?
 
That could be, sure. I have some like that and the screw head is read as white. But your screw head might not be very light/reflective... maybe it's recessed. If it extends into the area of the third mark from the right, it would be worth emphasizing that supposed white area with white paint to make sure it's not read as black.

I have not had very good luck with coding my older lenses myself. The marker ink/paint rubs off as you mount/dismount the lens. Some have observed the material gumming up the sensor strip on the camera lens flange. You'll want to make sure that stays clean. Newer Zeiss and Voigtlander lenses have a groove machined in the flange face so the hand-applied marking will last. But most of mine went to DAG for a focus check/adjust, general CLA, and machined pits coded to my request.
 
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