Feature:1. FUNCTION AND EFFECT: Thread for M42x0.75, suitable for camera T2 bayonet lens, T2 adapter ring to NEX bayonet mirrorless camera2. FLEXIBLE AND ADJUSTABLE: Height control valve can adjust the height of the eyepiece is 67mm to 80mm. The diameter control valve can adjust the eyepiece diameter from 41.5mm to 44.5mm3. SCOPE APPLICATION: Equipped with T2 to NEX adapter ring, suitable for Micro single camera, good for visual photography4. HOLLOW DESIGN: Does not affect the focusing wheel, the two sides do not affect the adjustment of focusing hand wheel5. DURABLE ALUMINUM ALLOY: Simple and practical, easy to install, aluminum alloy material, can be used for a long timeSpecification:Item Type: Lens Mount AdapterMaterial: Aluminum alloyScope: NEX bayonet mirrorless cameraAdjustable Eyepiece Height: Approx. 67 ~ 80mm / 2.64 ~ 3.15inAdjustable Eyepiece Diameter: Approx. 41.5 ~ 44.5mm / 1.63 ~ 1.75in.Package List:1 x Socket1 x Adapter Ring1 x Wrench