Viltrox adapter bayonet EF-EOS M2 - Canon EF to Canon EF-M 0.71xh2> Viltrox EF-EOS M2 is an active adapter bayonet Canon EF-M designed for lenses with Canon EF mount. It has a “Speed Booster” lens, reduces crop by 0.71x and increases light by 1 f-stop. Works with Canon EOS M6, M5, M50, M100 and other models with EF-M2 bayonet. With its help, you can expand the capabilities of your camera with Canon, Sigma, Tamron and other manufacturers! Full communication with the body and fast autofocus give Ci confidence in operation in all conditions. The built-in optical system gives Ci the capabilities known from the adapters (reducers) “Speed Booster”. Not only do you get an effective 0.71x focal length converter, reducing the crop sensor from 1.6x to 1.13x, but you will also increase the light output by 1 f-stop. With the Canon EOS M camera (APS-C matrix) and the 50/2.8 lens mounted za adapter Viltrox EF-EOS M,effective focal length will be 56.8 mm -instead of 80 mm as with a regular adapter without a lens. This field of view is similar to cameras with a full-frame sensor! In addition, you can enjoy twice the exposure time thanks to the “brighter lens” with an effective f1.8 aperture, which is invaluable for shooting in difficult lighting conditions. Technical data: Compatible lenses: for Canon EF lenses Compatible Cameras: Digital cameras with interchangeable lenses that are compatible with the EF-M lens Focus Mode: Auto Focus Focal multiplier: 0,71X Optical glasses: 4 groups, 4 glasses Firmware update: USB update port Product weight: 145 g / 5,1 oz (without caps) Package Size: 11 * 10,5 * 6 cm / 4,3 * 4,1 * 2,4 inch Package Weight: 280 g / 9,9 oz This adapter for lens mount is not compatible with EF-S mount lenses.