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Summiron 5cm F2 and coding

  
 
JCKnapp74
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p.1 #1 · Summiron 5cm F2 and coding


I know this doesn’t matter so much but I was hoping to use this lens with my M11. I’ve already used it actually. I know the coding isn’t so crucial but how do I obtain the 6 color code for this lens and what adapters are people using for these older lenses? I don’t need the super fancy ones. I just prefer the camera be able to read the lens. Thanks.


Jan 02, 2026 at 07:45 PM
Fred Miranda
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p.1 #2 · Summiron 5cm F2 and coding


JCKnapp74 wrote:
I know this doesn’t matter so much but I was hoping to use this lens with my M11. I’ve already used it actually. I know the coding isn’t so crucial but how do I obtain the 6 color code for this lens and what adapters are people using for these older lenses? I don’t need the super fancy ones. I just prefer the camera be able to read the lens. Thanks.


If the lens is M39 mount, then yes, you would need an M39 to M adapter to use it on your M11. It's a very thin adapter, usually around 1mm thick. I’d recommend getting one that supports 6-bit coding. Those have the small recesses where you can apply the black paint, only black is needed for the camera to read the code.

If the lens is already an M-mount lens, you unfortunately can't just paint the code directly on the mount since it will smear and won't hold. In that case, the only solution is to replace the mount with one that supports 6-bit coding.



Jan 10, 2026 at 10:34 AM
stgrove
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p.1 #3 · Summiron 5cm F2 and coding


I had DAG 6 bit code some LLL lenses and he had to replace the the mount which he had some guy make up in WI.


Jan 14, 2026 at 02:23 PM







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