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Metabones Leica R Lens to RF Speed Booster ULTRA 0.71x (MB_SPLR-EFR-BM1)
Features and Benefits | |
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This adapter is a mechanical adapter. It does NOT support electronic aperture control, AF and EXIF.
Limitations | |
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This adapter is a mechanical adapter. It does NOT support electronic aperture control, AF and EXIF.
Sharper corners, less distortion, reduced vignetting
New optical design: advanced 5-element/4-group optical design incorporating ultra-high index tanatalum-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, 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.
List of manual focus lenses which REQUIRE MODIFICATION to be used on Speed Booster ULTRA
Many manual focus lenses have rear protrusions (spikes, levers, other appendages) which would damage the optics and/or housing of Speed Booster ULTRA. They need to be modified before they can be safely used on Speed Booster ULTRA. Check and make sure there are no rear protrusions from the adapter/lens combination before using on Speed Booster ULTRA. Scratches and damages caused by rear protrusions or by poor quality adapters are not covered by warranty. The following is an incomplete list of lenses known to be incompatible.
Contax/YashicaDistagon 3,5/15mm | Leica RSuper-Elmar-R 15mmElmarit R 28/2.8 Elmarit R 35/2.8 Summicron R 50/2 | Nikon F20/2.8 AI-S | Olympus OMOM 18/3.5OM 21/2 OM 21/3.5 OM 28/2.8 OM 50/1.8 | Pentax KEvery Pentax K-mount lens has a protruding fin and an aperture lever. It does NOT fit. |
| 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 | Leica R |
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