#23A Light Red- The red filters are made from renowned Schott and Hoya optical glass and allow for maximum contrast on viewing planetary and lunar detail; #12 Yellow - The yellow filter improves contrast on Moon craters; on Mars; channels and polar caps become more apparent
#56 Light green - The light green filter is ideal for observing the ice caps on Mars and the yellowish sand storms on the Martian surface; it also improves the contrast of reddish and bluish structures in Jupiter's atmosphere
Variable Grey Polarizing Filter - The variable polarizing filter allows for selective adjustment of brightness; which is useful for terrestrial observation; light transmission of polarizing filters is between 1% and 40%
Premium Image Quality: Premium telescope filter for reducing the brightness of the moon and improving contrast and surface detail; reduces glare and improves definition; this can be useful when viewing the sky in areas where there is light pollution
Standard 1.25 Inch Filter Thread: The 1.25inch Moon and Skyglow Filter is screwed into the eyepiece thread; also; the filter will fit all standard sized 1.25inch eyepieces and accessories; it is threaded on both sides for stacking with other filters