Orion Color Four Filter Set for 1.25-Inch Eyepieces: Planetary and lunar observation is almost always improved by the use of color filters. (YRGB) 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 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 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!

About Each Filter:

#15 Deep Yellow Planetary Filter:

red and orange features on Saturn, Jupiter, and Mars
contrast of lunar features
low-contrast cloud detail on Venus

#25 Red Planetary Filter :

Martian surface details in large scopes
bluish cloud regions on Jupiter and Saturn
contrast of Mercury against blue sky
cloud definition on Venus

#58 Green Planetary Filter:

contrast of blue and red structures on Jupiter (including Red Spot)
melt lines around Martian polar ice caps
Saturn's cloud belts

#80A Medium Blue Planetary Filter:

details in Jupiter's cloud belts and Red Spot
high clouds and polar caps on Mars
lunar surface details
Venus cloud features

Orion color planetary filters are the absolute best available. Made from high-grade Schott optical glass, each is vat-dyed for even color distribution and then fully anti-reflection 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.

This set includes four 1.25-inch filters:

#15 Deep Yellow Planetary Filter

#25 Red Planetary Filter

#58 Green Planetary Filter

#80A Medium Blue Planetary Filter

1.25-Inch Filter: #15 Deep Yellow Planetary Filter
1.25-Inch Filter: #25 Red Planetary Filter
1.25-Inch Filter: #58 Green Planetary Filter
1.25-Inch Filter: #80A Medium Blue Planetary Filter

Beginner Telescope Filters

Orion Basic Color Telescope Filter Set - 1.25" Round Mounted