Compatibility] Designed for 4/3 lens for cameras with M4/3 lens, replacement for Olympus E-P1, E-P2, E-PL1, E-PL2, Panasonic G1, G2, G10, GF1, GF2, GF3, etc. [Metal electronic contacts and autofocus function] Makes focusing smoother and faster, and the image clearer, especially for macro photography. [Manual Aperture Control] Convenient for shooting in bright or low light, flexible in adjusting light transmission, providing clear image with higher quality. [1/4 Inch Screw Hole] It can be easily mounted on a tripod, freeing up your hands, making photography less labor-intensive. [Easy to install] With red dot on adapter ring, convenient to install, easy and quick to use; Made of top quality material, sturdy and durable to use. Technical data: Brand: FOTGA Model: OEM4/3 (AF) Black colour Material: metal and plastic; Product size: 6.6 x 6.6 x 2.5 cm / 2.5 x 2.5 x 0.98 inch Product Weight: 58g/2.04oz Package size: 7.2 x 7.2 x 5.5 cm / 2.8 x 2.8 x 2.1 inch Package Weight: 75g/2.64oz