Sky Mentor Light Pollution Filter - 2" - TA-301-3 Mirror Diagonals This guarantees you visibly sharp

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

+/- 6° Azimuth PEC: PPEC

Two additional primary factors played into the equation – Eye Relief (and the related large eye lens size) and Ease of Viewing (a combination of long eye relief and control of pupil aberrations)

Field of View:  1

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

Sky Mentor Light Pollution Filter - 2" - TA-301-3 Mirror Diagonals This guarantees you visibly sharpSky 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