Key Features
Features and Benefits
Leica R-mount lens to L-mount cameras/camcorders ;
This product is designed for the APS-C Crop mode of the specific cameras (eg. 4K 60P Crop mode of Panasonic S1H, S5 and S5K, etc).
Increase maximum aperture by 1 stop;
Increase MTF;
Makes lens 0.71x wider;
The 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;
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);
Limitations
This product is designed for the APS-C Crop mode of the specific cameras (eg. 4K 60P Crop mode of Panasonic S1H, S5 and S5K, etc).
The rear element of the lens cannot protrude from the flange more than 10.5mm.
The following lenses require modification in order to fit on the Speed Booster.
Super-Elmar-R 15mm
Elmarit R 28/2.8
Elmarit R 35/2.8
Summicron R 50/2
Super telephotos such as the Telyt 560/5.6 may vignette at the corners.
Description
Metabones® Speed Booster® ULTRA 0.71x for L-Mount and RF-mount cameras
Always Enhance and Never Degrade the Performance of the Attached Master Lens.
Sharper corners, less distortion, reduced vignetting
New 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 and Super35 camcorder, such as Sony E-mount, Fuji X-mount cameras Sony FS7 MARKII, 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/Prime lenses regardless of exit pupil distance.