Sky Mentor Light Pollution Filter - 2" - TA-301-3 2X Barlows Celestron Starbright XLT Coatings coupled

Celestron Starbright XLT Coatings coupled with Celestron's StarBright XLT coating group on every surface

Cassini''s Division in the rings of Saturn

309 grams (2") Lens Coating: "Phantom Coating" - Baader - Group Multicoated Baader SKU: 2454826

stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera

Distance from Rubber Cup: 15 mm

Sky Mentor Light Pollution Filter - 2" - TA-301-3 2X Barlows Celestron Starbright XLT Coatings coupledSky Mentor Light Pollution Filter 2" The Sky Mentor Light Pollution Filter is a 2" specialty filter that blocks the visual spectrum except for wavelengths between 480 nm and 510 nm. This type of blocking filter is also known as a Nebular or ALP (anti light pollution) or an LPR (Light Pollution Reduction) filter. This particular transmission characteristic allows passage of ionized oxygen and hydrogen lines, but blocks light pollution sky reflectance