Makes a great TTL viewer. Put the S-Mount to M-Mount adapter onto the M-Mount to u4/3rds adapter, and put a known good Nikkor-S 5cm F1.4 onto it. Got the distance to a subject, and shimmed the Contax mount lens until it matched the Nikkor. Amin has a Sister site, ziforums.com. Some of you have expressed an interest in Leica film cameras. I post a number of projects on adapting inexpensive Russian lenses for the Leica. A cheap way to add a 50/1.5 to your Leica. Repair/Projects - Zeiss User Forums Projects get posted there, and the Contax adaptation will be soon.