Metabones Contax/Yashica CY Lens to L-Mount CINE Speed Booster ULTRA 0.71x
The Contax/Yashica CY Lens to L-Mount CINE Speed Booster ULTRA 0.71x from Metabones uses an advanced five-element in four-groups optical design, incorporating ultra-high index tantalum-based optical glass to achieve optical performance with improved corner sharpness, less distortion, and reduced vignetting. The Speed Booster ULTRA has a magnification of 0.71x and is well corrected for use with virtually all full-frame zoom and prime lenses regardless of exit pupil distance.
Mechanical
Patented positive-lock L lens mount
The tripod foot is detachable and compatible with Arca-Swiss, Markins, and Photo Clam ball heads
Flocking to reduce internal reflection
Satin surface finish
Aluminum alloy and brass construction with chromium plating
Optical
Increase maximum aperture by 1 stop with a maximum output aperture of f/0.9
Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic
Increase MTF and makes lens 0.71x wider
The Contax/Yashica CY Lens to L-Mount CINE Speed Booster ULTRA 0.71x from Metabones uses an advanced five-element in four-groups optical design, incorporating ultra-high index tantalum-based optical glass to achieve optical performance with improved corner sharpness, less distortion, and reduced vignetting. The Speed Booster ULTRA has a magnification of 0.71x and is well corrected for use with virtually all full-frame zoom and prime lenses regardless of exit pupil distance.
Mechanical
Patented positive-lock L lens mount
The tripod foot is detachable and compatible with Arca-Swiss, Markins, and Photo Clam ball heads
Flocking to reduce internal reflection
Satin surface finish
Aluminum alloy and brass construction with chromium plating
Optical
Increase maximum aperture by 1 stop with a maximum output aperture of f/0.9
Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic
Increase MTF and makes lens 0.71x wider
