Feature: 1. FUNCTION AND EFFECT: Thread for M42x0.75, suitable for camera T2 bayonet lens, T2 adapter ring to NEX bayonet mirrorless camera 2. 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 44.5mm 3. SCOPE APPLICATION: Equipped with T2 to NEX adapter ring, suitable for Micro single camera, good for visual photography 4. HOLLOW DESIGN: Does not affect the focusing wheel, the two sides do not affect the adjustment of focusing hand wheel 5. DURABLE ALUMINUM ALLOY: Simple and practical, easy to install, aluminum alloy material, can be used for a long time Specification: Item Type: Lens Mount Adapter Material: Aluminum alloy Scope: NEX bayonet mirrorless camera Adjustable Eyepiece Height: Approx. 67 ~ 80mm / 2.64 ~ 3.15in Adjustable Eyepiece Diameter: Approx. 41.5 ~ 44.5mm / 1.63 ~ 1.75in. Package List: 1 x Socket1 x Adapter Ring1 x Wrench