Viltrox EF-E II 0.71x Lens Mount Adapter for Canon EF-Mount Lens to Select Sony

Viltrox allows a full-frame Canon EF-mount lens to be mounted onto a Sony E-mount camera. While doing so, the adapter''s optics help to maximize the connected lens''s apparent angle of view while providing a one-stop increase for the camera over the lens''s aperture range.

If a lens intended for 35mm film or similarly-sized full-frame camera sensors is connected to a Sony E-mount camera, it would project an image larger than the camera''s APS-C sized sensor was built to accept. Able to capture only the center portion of the projected image, the effective angle of view of the lens would be narrowed, creating an in-camera "crop factor." This adapter condenses the light from a lens designed for 35mm film or "full frame" camera sensors and projects it onto a Sony E-mount camera''s APS-C sensor. This allows the APS-C sensor to utilize more of the light gathered by a connected lens, which effectively reduces the crop factor while making available to the sensor an additional one stop of light for