Feature: 1. Applicable Model: This adapter cylinder thread M42x0.75 is suitable for T2 mount lens of camera, and T2 adapter ring is applicable to for Pentax K series SLR camera. 2. Height and Diameter Adjusting 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. Hollow Design: This T mount spotting scope camera adapter tubee adopts hollow design, which does not affect the focusing wheel and the adjustment of the focusing hand wheel on both sides. 4. Applicable Scenes: This adapter tube and T ring is suitable for birdwatching spotting scope and SLR camera, which is helpful for visual photography. 5. Easy to Install: This photographic accessory is simple, practical and easy to install, made of aluminum alloy and can be used for a long time. Specification: Item Type: T Mount Spotting Scope Camera Adapter Tube and T Ring Material: Aluminum Alloy Color: As Pictures Shown Weight: Approx. 186g / 6.6oz Thread: Male Thread: M42 x 0.75mm Application: Bird Watching Binoculars, SLR Camera. Package List: 1 x Adapter Tube 1 x Adapter Ring 1 x Wrench