Metabones Canon EF Lens to RF-Mount T CINE Speed Booster Ultra 0.71x Adapt

Sharper Corners, Less Distortion, Reduced VignettingMetabones EF-RF Speed Booster ULTRA 0.71x - to adapt Canon EF mount full-frame lenses to the new Canon RF mount. Filmmakers are now able to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively and support the newly EOS C70(Super 35mm sensor). The field of view is now much closer to still photo mode. This new Speed Booster is not intended for still photography but will work if the camera is configured to APS-C mode.Speed Booster ULTRA uses an advanced 5-element/4-group optical design by Caldwell Photographic Inc., incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting. Speed Booster ULTRA has a magnification of 0.71x, effectively reducing the crop factor of 4k video on EOS R and EOS RP from 1.75x to 1.24x. The Speed Booster ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is well corrected for use with virtually all full-frame SLR lenses regardless of exit pupil distance. Thus, the Speed Booster ULTRA performs extremely well with professional-grade f/2.8 zoom lenses such as the 24-70mm f/2.8 and 70-200mm f/2.8 zooms by Canon to produce 17-50mm f/2.0 and 50-142mm f/2.0 high-speed zooms, respectively. Similarly, high-speed fixed focal length lenses such as a 50mm f/1.2 will be transformed into a 35.5mm f/0.9 lens with excellent contrast and resolution from the center all the way to the edges of the image.Metabones Canon EF Lens to Canon RF Mount T Speed Booster ULTRA 0.71xCompatibility List• Canon RF camera (under APS-C crop mode)• EOS R, EOS RP, EOS R5, EOS R6, EOS C70• RED Komodo Camera• Canon EF-mount Lens• Canon EF-Extender (Teleconverter)• Carl Zeiss EF-mount Lens• Sigma EF-mount Lens• Tamron EF-mount Lens• Tokina EF-mount Lens• Contax N mount lenses modified to Canon EF by Conurus• Contax 645 NAM-1 adapter modified to Canon EF by ConurusWhy Metabones?Since its inception, Metabones has been designing and manufacturing lens adapters recognized among professionals and enthusiasts as leaders in design and workmanship.Contrary to the popular trend of other factories using an aluminum ring painted black on the camera-body-side, we instead take no short-cut but use precision-machined brass with chromium plating on both the camera-body and the lens sides of our adapters, in order to ensure smooth mounting, great appearance, and durability. The lens side of the adapter features a strong leaf-spring structure, strengthening the adapter-lens connection and ensuring tightness of the lens in order to reduce wear and prevent focus errors and optical alignment issues from appearing.Metabones uses matte-black treatment to keep internal reflection to a minimum in order to maintain the maximum