Description: This electronic lens adapter is specially designed for existing 4/3 four thirds lens to micro 4/3 cameras for Olympus Pen/Panasonic Lumix. With electronic pins, it permits auto focusing. Compatible with cameras for Olympus MMF-1 MMF-2 MMF-3. Replace for Panasonic DMW-MA1 Lumix G Four Thirds DSLR lens mount adapter. High-technics treatment on the contact pins, permitting perfect signal transmitting between lens and camera. Comes with front & rear caps for protecting and 1/4" tripod mount hole. Specification: Front mount: for 4/3 Mount Rear mount: for Micro 4/3 Mount Item Size: approx. 6x6x3.5cm/2.4x2.4x1.4inch Item Weight: 58g Material: Plastic Camera: for Micro 4/3 Mount Camera Lens: for OM 4/3 Mount Lens Suitable for: Four Thirds 4/3 Lens Micro Four Thirds (MFT,M4/3) Mount Camera Such as: Olympus M4/3 PEN E-PL1, E-PL1s, E-PL2, E-PL3, E-P2, E-P3, E-M, OM-D, E-M5, E-M10 Panasonic Lumix DMC-G1, G2, G3, G10, GX1, GH1, GH2, GF1, GF2, GF3, GF5, GH4, Panasonic AG-AF100 Mirrorless Digital Cameras Pocket Cinema Camera (BMPCC) Package Includes: 1Piece 4/3-M4/3 Lens Mount Adapter Ring Note: It not available for Manual Focus Camera and Lens. It's need the camera lens has auto focus function.