Features: 1. Made of high quality alloy material with matte black anodized surface, durable, wear-resistant, anti-corrosion and extends its service life. 2. Completely manual control, supports manual focus and manual exposure and aperture priority. 3. Finish coating treatment at the inner wall to avoid reflection to CMOS and affect the imaging. 4. Precise thread ensures firm and smooth connection between lens and camera body. 5. Support for Canon FD mount lens to fit for M4/3 mount camera body. Specification: Name: Adapter Ring Material: Alloy Color: Black Compatible Lens: for Canon FD Mount Lens Compatible Camera: for M4/3 Mount Camera Size: Approx. 6.5x6.5x2.7 cm/ 2.56x2.56x1.06 inch Weight: Approx. 68 g Packing List: 1 x Lens Adapter Ring Note: 1. Set "shooting without lens"(select open) in the last item in Menu-Custom Settings. 2. When focus for the mirrorless camera, press the direction key for focus frame. Then press the four directions key to move to the position of the target and press OK to enlarge by 7 or 10 times, half-press the shutter and return to the original image. The magnification is controlled by the front wheel rotation. 3. Repeatedly press INFO key on for Olympus mirrorless camera to get the focus frame, and then press OK, the wheel will be changed between 7 and 10 times, and then press OK to return to the original picture.