M42 Extension Tube Kit

Description

A set of four M42×0.75mm (T2) extension tubes in lengths of 5mm, 10mm, 15mm, and 20mm. These can be used individually or stacked in any combination to achieve precise back-focus spacing in your imaging train — from 5mm up to 50mm in 5mm increments.

Machined from anodized black aluminum with M42 male and female threads on each end. Use them between your camera adapter, field flattener, off-axis guider, filter wheel, or other T2-threaded components to dial in the exact back-focus distance required by your optical system. Correct spacing is critical for flat, well-corrected images across the entire sensor.