Optical

• 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.

Electronic

• Lens iris/aperture is set by the controls on the camera body.
• Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lens models.
• Image stabilization (IS) lens support.
• Push autofocus if supported by camera.
• Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L).
• Cinema EOS lens support (CN-E 18-80mm T4.4 L), including AF (requires external 5V power via micro USB port), auto iris and servo zoom.
• Powered by camera body. With most lenses, no external power source required.

Mechanical

• The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.
• Flocking to reduce internal reflection.
• Rubber gasket protects M43 mount connection from dust and moisture.
• Aluminum alloy and brass construction with chromium plating.
• Satin surface finish.