Solomark 2 Inch 42mm Telescope / Camera Adapter- Lets You Attach a T-ring Equipped Dslr or SLR Camera Directly to Your Telescope. 2 Inch camera adapter lets you attach a T-ring equipped DSLR or SLR camera directly to your telescope. Useful for either prime-focus or eyepiece-projection photography with refractors or reflector telescopes. Slides into 2jnch telescope focuser or 1.25inch focuser with step-down adapter Suitable for eyepiece projection with an eyepiece smaller than 2inch in diameter ,Made of high grade alloy, not plastics Fully metal construction