M-Z 6bit adapter ring

Great adapter, with a few caveats:

My six M lenses do not have 6bit code. The M-Z ring gets a false reading on several of them. The workaround is to set the focal length and press reset before mounting the lens.

All lenses without 6bit codes appear as maximum aperture f/0.95. This does help somewhat in identifying that the M-Z adapter was used, but limits the available recorded setting to f/5.6. In this case I just regard that as f/5.6 or greater. (6bit lenses set the aperture range properly.)

I also have several lenses that don't have focal length settings available on the M-Z, notably 20mm and 40m. Testing with the closest available setting (28 for 20, 35 for 40) showed a bit of degradation in stabilization, but not too bad. In low light shooting I can revert to a manual ring and use in-camera lens profiles.

Overall the M-Z 6bit adapter ring has greatly improved shooting with M lenses on my Z7. I prefer the combination to my vintage M6.