Kipon Electronic AF adapter for Contax-645 lens to EOS-M

Contax-645 lens to EF / EF-S Mount Camera Mount Adapter

Compatible lens:  Contax-645 lens 

Compatible Cameras: Canon EOS 1D, 5D, 70D, 60D, ...

Front mount: Contax-645  mount

Rear mount: Canon EF mount

KIPON CONTAX645-EF auto-focus adapter, can use Contax645 medium format lens on Canon EF body, achieving auto-focus function.

Also combine with KIPON EF-S/E AF, can use Contax645 lens on SONY popular E mount mirrorless cameras (including Apsc,Fullframe models), achieving iris electronic control, but without auto-focus function.

Fotodiox Pro EF and EF-s electronic adapter for Canon EOS-M

It is an adapter equipped with electronic interconnection between the mounts, allowing the camera to use all the lens functions such as autofocus, diaphragm control and stabilizer.

Includes back and front covers.

Characteristics:

Mounts Canon EOS (EF/EF-S) D/SLR lenses to Canon EOS M (EF-M) mount mirrorless cameras; infinity focus or beyond allowed

Complete communication between the camera body and most lenses, allowing autofocus and aperture control
Improved craftsmanship and high tolerance construction for demanding professionals.
Precise fit and solid connection; The lens has no play, space or movement when mounted on the adapter and no adjustments are required
Precision metal construction with chrome-plated brass mounts for a secure, solid fit
Compatible cameras: Canon EOS M, M2, M3, M5, M10

With the combination of both adapters you will be able to use your Contax-645 lens on your Canon EOS-M camera while maintaining autofocus and automatic  aperture control .