TheÂ Rollei QBM Lens to Sony E-Mount Camera Speed Booster ULTRA fromÂ Metabones improves upon the original Metabones Speed Booster with a 5 element/4 group optical design that incorporates ultra-high refractive index tantalum-based glassÂ for improved sharpness and reduced distortion and vignetting. The Speed Booster ULTRA allows a full frame Rollei QBM lens to be mounted to an APS-C formatÂ E-Mount camera and in doing so, increases the angle of view and increases the maximum aperture by approximately one f/stop.
Rollei QBM Lens to Sony E-Mount Camera
Ultra-High Index Tantalum-Based Glass
Increases Maximum Aperture by 1 f/Stop
Increases Angle of View by 0.71x
Infinity Focus Adjustment
Detachable Tripod Foot
Black Matte Interior; Black Exterior