Covers MFT Sensors, Micro Four Thirds Mount, Suitable for 4K Image Capture, Consistent Lens Gear Placement, Internal Focus Design, Weighs 1.39 Pounds, 85mm Front Diameter, 9 Elements in 8 Groups, 82mm Front Filter Thread. The compact yet robust SLR Magic MicroPrime CINE 17mm T1.5 Lens covers MFT image sensors and features a Micro Four Thirds mount. Suitable for 4K capture each lens in the MicroPrime Cine series is similar in size and weight and features consistent gear positioning to enable quick lens changes. The MicroPrime Cine 17mm lens produces sharp images and pleasing bokeh with natural-looking out-of-focus highlights. This lens has an 85mm front diameter for compatibility with a variety of matte boxes an internal focus design to prevent the front of the lens from rotating when focusing and an 82mm front filter thread.