1Durable Material: Mount part is made of aluminum alloy metal material, high quality workmanship, strong and durable. 210mm+16mm+21mm Extension Tube: Composed of 10mm, 16mm and 21mm single adapter ring. Three adapter ring can be used alone or in combination. After mounting, the shortest focusing distance of the lens can be reduced to achieve a local macro effect. 3Easy to Use: Close shot adapter ring is installed between the camera and the lens, with electronic contacts, supports auto focus, is easy to install and remove, and can be quickly locked. 4Micro Lens Shooting: Close shot adapter ring is an effective accessory for macro photography, allowing you to easily take close up shots of small objects such as insects and flowers. Enables you to convert almost any lens into micro lens at very little cost while maintaining its original optical quality. 5Compatible Cameras: Suitable for Olympus M4/3 mount cameras, such as: fit for Olympus EPM1 EPM2 EPL1EPL2 EPL3 EPL5 EPL6 EPL7 EPL8 EP1 EP2 EP3 EP5 EP6 EM1 EM5 EM10 E M10II EM10III. Fit for Lumix G1 G2 G3 G5 G6 G7 G8 G80 G85 GF1 GF2 GF3 GF5 GF6 GF7 GF8 GF9 GX1 GX7 GX8 GM1 GM5 GM10 GH1 GH2 GH3 GH4 GH.