Unihedron Sky Quality Meter with Lens - Narrow Field of View - SQM-L Expl 25" eyepiece holder (also called

25" eyepiece holder (also called visual back) that can be attached to (screwed onto) a male M48 thread

This sturdy

Explore Scientific lifetime transferable warranty

A long eye relief is especially important for eyeglass wearers because it allows them to enjoy the full field of view

The "Sky Quality Meter" measures the brightness of the night sky in magnitudes per square arcsecond

Unihedron Sky Quality Meter with Lens - Narrow Field of View - SQM-L Expl 25" eyepiece holder (also calledUnihedron Sky Quality Meter with Lens Narrow Field of View SQM L We are an Australian authorised distributor of Unihedron products. An affordable meter for measuring sky brightness for astronomers! The "Sky Quality Meter" measures the brightness of the night sky in magnitudes per square arcsecond. Designed by Dr. Doug Welch and Anthony Tekatch, the Unihedron Sky Quality Meter offers unprecedented sensitivity in a handheld meter. Uses: Find out how