Metabones Contax Yashica CY to X-mount Speed Booster ULTRA 0.71x CINE

The Metabones Contax Yashica CY to Fuji X-mount Speed Booster ULTRA 0.71x CINE adapts vintage Contax Yashica CY lenses to Fuji X-mount mirrorless cameras. It increases lens speed by 1 stop, improves MTF, and makes lenses 0.71x wider, while providing robust cine-style positive-lock mounting and professional-grade optical performance for filmmakers and photographers.

Upgrade your Contax Yashica CY lenses for modern Fuji X-mount mirrorless cameras with the Metabones CY to X-mount Speed Booster ULTRA 0.71x CINE. This innovative Speed Booster reduces the crop factor from 1.5x to 1.07x, effectively widening your lens’s field of view while increasing its maximum aperture by 1 stop. High-speed prime lenses, such as a 50mm f/1.2, are transformed into ultra-fast 35.5mm f/0.9 optics with outstanding sharpness and minimal distortion from center to edge.

The advanced 5-element/4-group optical design uses ultra-high index tantalum-based glass by Caldwell Photographic in the USA, providing superior MTF, reduced vignetting, and enhanced corner-to-corner sharpness. Its cine-style positive-lock mount ensures a firm, zero-play connection with your vintage lenses, ideal for precise video work.

Constructed from precision-machined brass with chromium plating, this adapter offers a durable, satin-finished surface and perfect lens fit. The detachable Arca-type tripod foot allows quick and stable mounting on Arca Swiss, Markins, or Photo Clam ball heads. Designed to maintain infinity focus, the Speed Booster ULTRA ensures professional-grade performance with all compatible SLR lenses, including high-speed zooms and prime lenses.

Key Features

• Reduces crop factor from 1.5x to 1.07x for DX-size Fuji X-mount cameras
• Increases maximum aperture by 1 stop
• Makes lenses 0.71x wider
• Advanced 5-element/4-group optical design with ultra-high index tantalum-based glass
• Improves MTF, reduces distortion, and enhances corner sharpness
• Cine-style positive-lock CY mount for zero play
• Precision-machined brass with satin finish
• Detachable Arca-type tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads
• Maintains infinity focus for lenses with floating elements and CRC design