Key Features
Contax Yashica CY mount lens to Canon RF-mount cameras ;
Increase maximum aperture by 1 stop.
Increase MTF.
Makes lens 0.71x wider.
Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA (patent granted).
Positive-lock CY lens mount, the robust cine-style positive locking mechanism to ensure that no play when attaching the vintage lenses ;
Satin Surface Finish ;
Aluminum Alloy and Brass Construction with Chromium Plating ;
Rubber gasket protects the RF-mount connection from dust and moisture ;
Detachable Arca-Type tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads(clamp directly or attach to quick release plate by a 1/4″-20 screw).
The product is designed for the APS-C format camera (eg. Canon C70 and RED Komodo, etc.) or using with the APS-Crop mode of EOS R3, R5, R6, EOS R and EOS RP.
The following lens(es) have a protruding rear element and may not be compatible with or may require modification to fit the Speed Booster:
Distagon T* 3,5/15
This adapter is a mechanical adapter. It does NOT support electronic aperture control, AF and EXIF.