Feature: 1. Application: This adapter tube thread M42 x 0.75 is suitable for T2 mount lens of camera, and T2 adapter ring to mirrorless camera. 2. Height, Diameter Adjustable Valve: The height of eyepiece can be adjusted from 67mm to 80mm. The diameter of eyepiece can be adjusted from 41.5mm to 44.5mm. 3. Scope of Application: Equipped with T2 for EOSM adapter ring, suitable for mirror less camera, which is helpful for visual photography. 4. Aluminum Alloy Material: Made of premium aluminum alloy material, this adapter tube is strong and sturdy, rust and corrosion resistant, ensuring a long life span. 5. Hollow Design: The hollow design of the adapter tube does not affect the focusing wheel, and the adjustment of the focusing handwheel is not affected on both sides. Specification: Item Type: Lens Mount Adapter Ring Material: Aluminum Alloy Scope of Application: For EOSM bayonet mirrorless camera Thread: M42 x 0.75. Package List: 1 x Sleeve1 x Adapter Tube 1 x Wrench