Unihedron Sky Quality Meter with Lens - Narrow Field of View - SQM-L Expl Please note: this is the

Please note: this is the OEM version of the Orion Astrophography Flip Mirror - that is

Unfortunately all it takes is a about a second of the bright white light from a flashlight or a cell phone display to deplete your night vision and have you waiting around to adapt again

CEM40/CEM40EC** (version with 20mm diameter CW shaft)

Explore Scientific lifetime transferable warranty

This sturdy

Unihedron Sky Quality Meter with Lens - Narrow Field of View - SQM-L Expl Please note: this is theUnihedron 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