The Lumicon LF2110 2" Polarizing Filter is the best all-purpose lunar and planetary filter. It cuts glare and increases contrast on the moon and planets. In addition to polarizing the light, the Lumicon Polarizing Filter reduces its intensity by a factor of about 3. It may be double-stacked with Lumicon color filters for use on bright planets. It is also useful for daylight observation of land, sea and nature. Fits 2" eyepieces.
Lumicon Polarizing Filters are made from renowned Schott and Hoya optical glass and allow for maximum contrast on viewing planetary and lunar detail. Individually precision ground, highly polished with maximum light transmission coatings on both sides, these filters are 100% guaranteed for life.
Clear aperture = 43.75mm (1.72"); Weight = 0.5oz.; Filters feature standard male and female 2" astronomy filter threads (M48x0.75) on either side and can be stacked; Total length of filter cell (including threads) = 10mm (0.39")
Manufacturer part number: LF2110