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Metabones FD/FL to RF Speed Booster ULTRA 0.71x (EOS R) (MB_SPFD-EFR-BM1)
Sharper corners, less distortion, reduced vignetting
Optical design: advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.
Like the revolutionary original Metabones Speed Booster® announced in January 2013, the Speed Booster ULTRA has a magnification of 0.71x, and so it effectively reduces the crop factor of mirrorless cameras with DX-sized sensors(APS-C), such as Sony E-mount and Fuji X-mount cameras, from 1.5x to 1.07x. However, the new 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 and Nikon 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.
- Canon FD and FL mount lens to Canon RF-mount cameras ;
- Increase maximum aperture by 1 stop.
- Increase MTF.
- Makes lens 0.71x wider.
- Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA (patent granted).
- Satin Surface Finish ;
- Aluminum Alloy and Brass Construction with Chromium Plating ;
- Rubber gasket protects the RF-mount connection from dust and moisture ;
- Detachable Arca-Type tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads(clamp directly or attach to quick release plate by a 1/4-20 screw).
- The product is designed for the APS-C format camera (eg. Canon C70 and RED Komodo, etc.) or using with the APS-Crop mode of EOS R3, R5, R6, EOS R and EOS RP.
This adapter is a mechanical adapter. It does NOT support electronic aperture control, AF and EXIF.
| Type of Product | Adapters for lens |
| Compatible | Canon |
| Lens mount | Canon RF |
| Lens Format Coverage | APS-C |
| Focus Type | Manual Focus |
| Adapter type | speed booster |
| Adapter is for lenses | Canon FD |
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