Features: 1. Made of good-quality aluminum alloy with black coating treatment, colorfast, durable and corrosion-resistant. 2. Double structure of inner ring and outer ring. Three screws are used to fix the relative position of inner and outer ring, which can easily adjust the camera angle. 3. Support 1.25 inch eyepiece diameter telescope to fit for Olympus M4 or 3 camera body. 4. Connect cameras to some certain types of microscope. 5. Lightweight, small size and portable. Specifications: Model: T2-M4 or 3 Material: Aluminium Alloy Color: Black Eyepiece Diamter: 1.25 inches Mount: for M4 or 3 mount Thread: M42 x 0.75 mm Compatible Cameras: for Olympus EP1 EP2 EPL1 camera Packing List: 1 x Adapter Ring for M4 or 3 Mount Camera 1 x 1.25 inch Inside Thread Mount Bracket 1 x Wrench Notes: Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. 1,Made of good-quality aluminum alloy with black coating treatment, colorfast, durable and corrosion-resistant. 2,Double structure of inner ring and outer ring. Three screws are used to fix the relative position of inner and outer ring, which can easily adjust the camera angle. 3,Support 1.25 inch eyepiece diameter telescope to fit for Olympus M4 or 3 camera body. 4,Connect cameras to some certain types of microscope. 5,Lightweight, small size and portable.