Sky Mentor Light Pollution Filter - 2" - TA-301-3 Mirror Diagonals some wide-field eyepieces with fields

some wide-field eyepieces with fields of 82 degrees failed to deliver the same viewing experience as others with similar fields

It can be used for astronomy

This guarantees you visibly sharp stars across some of the largest CCD chips available today

Svbony UV/IR Cut Filter - 1

Sky Mentor Light Pollution Filter - 2" - TA-301-3 Mirror Diagonals some wide-field eyepieces with fieldsSky 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