Canon EF mount lens to M43 mount camcorders, specific for Blackmagic Design cameras with Super16mm sensor size.

Increase maximum aperture by 1 ²/₃stop. (with a maximum output aperture of f/0.74).

Increase MTF (details).

Makes lens 0.58x wider.

Patented 6-element/4-group optical design by Caldwell Photographic in the USA.