Features 1、THREADED M42X0.75: M42 thread T mount adapter tube thread M42x0.75, suitable for camera T2 mount lens, T2 adapter ring to SLR camera. 2、ADJUSTABLE HEIGHT DIAMETER: Camera adapter mount tube can adjust the height of the eyepiece 67‑80mm, can adjust the diameter of the eyepiece 41.5‑44.5mm. 3、HOLLOW DESIGN: T camera adapter mount tube is hollow design, does not affect the focus wheel, both sides do not affect the adjustment of the focus hand wheel. 4、SCOPE OF APPLICATION: T mount spotting scope camera adapter tube is suitable for bird watching lens SLR camera, which helps visual photography. 5、ALUMINUM ALLOY: Spotting scope camera adapter is made of aluminum alloy for long term use. Simple and practical, easy to install. Specification Item Type: T Mount Spotting Scope Camera Adapter Tube Material: Aluminum Alloy Thread: Male Thread: M42x0.75mm/0.03in Scope Of Application: Bird Watching Mirror SLR, Micro Single Camera Height Adjustment Valve: Adjustable Eyepiece Height: 67-80mm / 2.6-3.1in Diameter Adjustment Valve: You Can Adjust the Diameter of the Eyepiece from 41.5-44.5mm / 1.6-1.8in Package List 1 x T Mount Spotting Scope Camera Adapter Tube 1 x Adaptor Ring