Metabones SPCY-E-BM3 – Contax/Yashica to Sony E Speed Booster ULTRA 0.71x CINE

Metabones SPCY-E-BM3 – Contax/Yashica to Sony E Speed Booster ULTRA 0.71x CINE

The CINE version of the Speed Booster ULTRA mounts Contax/Yashica (CY) lenses on Sony E-mount cameras, with 0.71x focal reduction and one extra stop of light. With 0.71x magnification the crop factor of APS-C sensors drops from 1.5x to about 1.07x: a 50 mm f/1.2 becomes a 35.5 mm f/0.9 and a 24-70 mm f/2.8 zoom a 17-50 mm f/2.

Features

• Increases maximum aperture by 1 stop
• Increases lens MTF
• Makes the lens 0.71x wider
• 5-element/4-group optical design with ultra-high index tantalum-based glass by Caldwell Photographic (USA, patented)
• Cine-style positive-lock CY mount, no play with vintage lenses
• Detachable Arca-type tripod foot, compatible with Arca Swiss, Markins and Photo Clam heads (direct clamping or ¼"-20 screw to a quick release plate)

Note: Mechanical adapter: no electronic aperture control, AF or EXIF. The Distagon T* 3.5/15 has a protruding rear element and may be incompatible or need modification.

Specifications