The Metabones Speed Booster adaptor- Sony ALPHA to E-Mount ULTRA improves upon the original Metabones Speed Booster with a 5 element/4 group optical design that incorporates ultra-high refractive index tantalum-based glass for improved sharpness and reduced distortion and vignetting. The Speed Booster ULTRA allows a full frame Sony A-Mount lens to be mounted to an APS-C format E-Mount camera and in doing so, increases the angle of view and increases the maximum aperture by approximately one f/stop. 

The Speed Booster condenses light from the lens and projects it onto the APS-C sensor allowing the sensor to utilize all of the lens’ light and effectively reduces the crop factor of and APS-C E-Mount camera from 1.5x to 1.07x, producing a full-frame angle of view with an APS-C sensor. A corresponding increase in the maximum aperture of one f/stop makes the lens more effective in low-light situations and able to create a shallow depth of field. 

Metabones Speed Boosters are quality made using precision-machined brass with chromium plating on both the camera body and the lens side of the booster in order to ensure smooth mounting, quality aesthetic, and durability. This adapter has a detachable tripod foot that is compatible with Arca Swiss, Markins, and Photo Clam ball heads.

Key Features of the Metabones Speed Booster adaptor- Sony ALPHA to E-Mount ULTRA ( BM-104 )

• Sony A-Mount Lens to Sony E-Mount Body
• Ultra-High Index Tantalum-Based Glass
• Increases Maximum Aperture by 1 f/Stop
• Increases Angle of View by 0.71x
• Built-In Aperture Control Ring
• Infinity Focus Adjustment
• Detachable Tripod Foot
• Black Matte Interior; Black Exterior

• MPN – MB-104
• GTIN – 4897050181447