Originally posted by reivax I'm assuming you have to buy one of the adapters? Does the adapter retain AF while using the other adapter with it? Any reduction in performance?
Here is a whole lot of information on Techart PRO -
Techart PRO FAQ - FM Forums.
Yes, you can mount m42 lenses (and most other lenses) and have autofocus. The way it works is, m42-lens -> m42-Leica-M-Adapter -->Techart-Pro --> Sony a7ii, i.e. you are stacking adapters. Since the adapters are glassless, most lenses should be see significant change in performance (lenses with floating elements may be affected).
Thanks.