Optolong 3nm L-Ultimate Filter - 2" Baader For maximum stability and secure

For maximum stability and secure optical alignment the Celestron SkyMaster 20 x 80 Binoculars features enhanced structural reinforcement to the main binocular body

but without the added weight of the 11" optical tube

until the image is sharp

25" diagonal/eyepiece for visual use

Optolong 3nm L-Ultimate Filter - 2" Baader For maximum stability and secureThe Optolong L Ultimate 3nm dual band filter is designed to drastically reduce the effects of light pollution. The 3nm isolates the nebulae's emissions into H Alpha (red) and OIII (green blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral