Metabones Canon EF to BMCC T Speed Booster

Specifically designed to work with the Blackmagic Cinema Camera with Micro 4/3 mount, the Metabones Canon EF to BMCC Speed Booster corrects your full frame Canon EF mount lens to work on the smaller sized sensor of your BMCC by shrinking the image circle of the lens to fit on the BMCC's sensor. The net effect of this is to cancel out the crop factor to the image usually experienced when using a full frame lens on a smaller sized sensor, and to increase the effective speed of the lens by more than a stop. This adapter makes your lens 0.64x wider, and increases the maximum aperture by one and a third stops, as opposed to the standard Metabones MFT adapter that effectively widens the lens by 0.71x and increase the maximum f-stop by one stop. This adapter adjusts the crop factor of your camera from 2.39x to 1.53x, thus effectively transforming it into a Super 35 format cine camera. This adapter features improved internal flocking for reduced internal reflection compared to the previous version.