Arcturus 2 Inch Color Planetary Filter
# Color telescope filters will enhance your view of the planets and Moon, enabling you to see more detail
# High-grade Schott optical glass is vat-dyed for even color coating, then anti-reflection coated
# Anodized aluminum cells are double-threaded to permit filter stacking
Planetary and lunar observation is almost always improved by the use of color telescope filters. They bring out subtle details by selectively increasing the contrast among markings of different hues, and by reducing "irradiation," the smudging of the boundaries between light and dark regions due primarily to turbulence in the Earth's atmosphere.
With the right color telescope filter, suddenly the indistinct, pale bands of Jupiter resolve into loops and festoons. Delicate markings appear on Saturn's globe, and the Cassini and crepe divisions darken and solidify. Mars' polar caps stand out like tiny pearls, and vague lunar rilles acquire greater depth and contrast. Bad "seeing" becomes acceptable; good seeing becomes superb!
Because many planets have a characteristic color (e.g., Mars is reddish), a color telescope filter will reduce the predominant hues to enhance contrast and uncover hidden surface markings. That's why "the Red Planet" is most effectively enhanced with a green filter!
Made from high-grade Hoya optical glass, Orion color planetary telescope filters are vat-dyed for even color distribution and then fully antireflection coated. The glass is held in an anodized aluminum cell labeled with the appropriate Wratten filter number. The cell is double-threaded to permit threading of the filter into the barrel of an eyepiece as well as the stacking of filters for additional filtration options.