M48X0.75 Extension Tube Adapter Ring 50mm F Astronomical Eyepiece Extended Focus
Description:

Material: Metal - Aluminum
Flange distance: 50mm
Total length: 54mm
External thread depth: 4mm
Internal thread depth: 7mm
Inner diameter: 45mm
Outer diameter: 2 inches (about 50.8mm)
Thread specification: M48 * 0.75mm
Matting thread: Yes
Color: Black
Net weight: 56g
Package:
Extended focus ring * 1