Lens Mount Adapter for Contax Yashica C/Y Mount Lens to E Mount Camera for Sony Alpha a7 a7S a7R a7II a7SII a7RII A7RIII A7SIII A9 a6500 a6300 a6000 a5100

It worked, but needed a large amount of force to get in there. It doesn't seem to lock in, but uses friction to hold the lens, and feels like it will fail relatively quickly.