6bit code for CL Leitz Elmar C 4/90?

[vladimir]

Dear Leica CL Leitz ELMAR-C 90mm f4 Lens users on an M (240) what would you recommend to 6bit code this lens as? Thanks for your recommendation in advance. Vlad. P.S. I have posted this question on Leica forum, but not one reply out of 118 views, hopefully better luck here on RFF.

 

[ferider]

I don't code lenses 50mm and longer, since they don't need it. But if you want correct exposure/EXIF info, why not use the 90/4 Macro-Elmar ?