The Leica R-Mount to L-Mount Speed Booster ULTRA 0.71x from Metabones is designed for the APS-C crop mode in full-frame L-mount cameras and has a magnification of 0.71x, effectively reducing crop factor from 1.5x to 1.07x. The Speed Booster ULTRA performs extremely well with professional-grade f/2.8 zoom lenses and on high-speed fixed focal length lenses, such as a 50mm f/1.2 will be transformed to a 35.5mm f/0.9 lens with even contrast and resolution from the center all the way to the edges of the image.
Please note, the rear element of the lens cannot protrude from the flange more than 10.5mm and some lenses will require modification in order to fit on the adapter.
Increase maximum aperture by 1 stop
Makes lens 0.71x wider
Rubber gasket protects the RF-mount connection from dust and moisture
Both camera-side and lens-side of the adapter are made of brass, precision-machined, and plated with chromium
This adapter is a mechanical adapter. It does NOT support electronic aperture control, AF, and Exif
Satin surface finish, like your OEM lens and camera mounts
Designed to reach infinity focus while maintaining the correct registration distance required to maintain optical quality of CRC lenses or lenses with floating elements
Precise fit and solid connection. The lens has no play, gap, or wiggling when mounted on adapter and no adjustments are required to fit your lens
Advanced 5-element / 4-group optical design incorporating ultra-high index tantalum-based optical glass.
The following lenses require modification in order to fit on the adapter:
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