Sky Mentor Light Pollution Filter - 2" - TA-301-3 2X Barlows superior StarBright XLT coatings

superior StarBright XLT coatings

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

Explore Scientific U-Mount with Tripod for Large Binoculars

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

Sky Mentor Light Pollution Filter - 2" - TA-301-3 2X Barlows superior StarBright XLT coatingsSky 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