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Metabones CY to RF-mount CINE Speed Booster ULTRA 0.71x
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| Type of Product | Lens converters |
| Type of Product | Adapters for lenses |
| Compatible | Canon |
| Adapter is for cameras | Canon RF cameras |
| Adapter is for lenses | Contax Yashica (C/Y) |
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Metabones CY to Canon RF Speed Booster ULTRA 0.71x CINE Adapter
The Metabones Contax Yashica CY to Canon RF Speed Booster ULTRA 0.71x CINE Adapter enables CY-mount lenses to be used on Canon RF-mount cameras while increasing light transmission and widening the field of view. Designed for professional cinema use, it features a robust positive-lock mechanism and advanced optics for superior image quality.
This high-performance solution is designed for filmmakers and photographers seeking to adapt classic CY-mount lenses to modern Canon RF-mount cameras. Built as part of Metabones professional CINE series, this adapter incorporates a rugged cine-style positive-lock mechanism that securely locks the lens in place, eliminating play and ensuring precise focus control essential for demanding video production environments.
At its core is the renowned Speed Booster ULTRA optical system, featuring a sophisticated 5-element, 4-group design developed with ultra-high index tantalum-based optical glass by Caldwell Photographic. This advanced design reduces the effective focal length by 0.71x, resulting in a wider field of view while simultaneously increasing the maximum aperture by one stop. The result is brighter images, improved low-light performance, enhanced sharpness, reduced distortion, and minimized vignetting.
Constructed from a combination of aluminum alloy and precision-machined brass with durable chromium plating, the adapter offers exceptional durability and a premium satin finish that matches professional camera equipment. A built-in rubber gasket protects the RF mount from dust and moisture, making it suitable for use in various shooting conditions.
Additionally, the adapter includes a detachable Arca-type tripod foot, allowing direct compatibility with Arca-Swiss style tripod systems or attachment via a standard 1/4-20 screw. Optimized for APS-C format cameras such as the Canon C70 and RED Komodo or full-frame RF cameras in crop mode, this adapter expands creative possibilities while maintaining top-tier optical and mechanical performance.
Key Features
- Adapts Contax Yashica (CY) mount lenses to Canon RF-mount cameras
- Speed Booster ULTRA with 0.71x magnification
- Increases maximum aperture by approximately 1 stop
- Wider field of view with reduced crop factor
- Improves MTF, sharpness, and overall image quality
- Advanced 5-element / 4-group optical design
- Ultra-high index tantalum-based optical glass (Caldwell Photographic)
- CINE version with positive-lock lens mechanism (no play or movement)
- Durable aluminum alloy and brass construction with chromium plating
- Satin surface finish matching professional gear
- Rubber gasket for dust and moisture protection
- Detachable Arca-type tripod foot (Arca-Swiss compatible)
- Designed for APS-C cameras or crop mode on full-frame bodies
- Metabones CY to Canon RF Speed Booster ULTRA 0.71x CINE Adapter
- Detachable Arca-type tripod foot
- Front and rear protective caps
- User documentation
- Mount Compatibility: Contax Yashica (CY) lens to Canon RF-mount camera
- Magnification: 0.71x
- Light Gain: +1 stop
- Optical Design: 5 elements in 4 groups
- Material: Aluminum alloy and brass, chromium-plated
- Lens Mount Mechanism: Positive-lock (CINE version)
- Tripod Foot: Detachable, Arca-type compatible (1/4-20 screw)
- Weather Protection: Rubber gasket (dust and moisture resistance)
- Finish: Satin
- Format Compatibility: APS-C / Super 35 or full-frame in crop mode
- Autofocus: Not supported (manual focus lens dependent)
