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Filters for telescopes

Telescope filters for all sorts of sky observations

Below you will find a complete overview of all available filters and their various functions. Filters make sure contrasts are observed with more clarity. What is more, a great number of observations can only be done in this way! When you are going to observe Mars, for example, you can use a yellow filter in order to get a good view of the clouds. For the polar caps you use a green filter, and so on.
Please find the manual below.

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Polar filter (nr. 3)

For increasing contrast between lunar features of varying brightness.
Increases contrast between surfaces of varying planetary transmissions
Enriches blue heavens with a deeper shade of blue.
Removes surface reflections
Reduces atmospheric haze.

Yellow filter (nr. 12)

Moon: for increasing contrasts between lunar characteristics under various light conditions.
Venus: to be able to view the contrast of the thick Venus cloud under good light conditions.
Mars: for increasing contrast of the polar caps, frozen areas and low-hanging clouds.
Jupiter: for darkening atmospheric currents.

Orange filter (nr. 21)

Moon: for increasing contrasts in the lunar landscape
Mercury: to reduce the brightness of the observation during daytime observations.
Venus: to reduce the brightness of the observation during daytime observations.
Mars: to improve contrast of the polar caps, frost areas and low-hanging clouds
Jupiter: to be better able to observe the belt structure.
Saturn: to have a better look at the atmospheric bands.

Red filter (nr. 23A)

Moon: (somewhat useful) for increasing contrast of lunar features.
Mercury: to improve observations when Mercury is in the twilight zone (when the planet is close to the horizon).
Venus: to reduce brightness when observing during the daytime.
Mars: to improve contrast of the polar caps, frost areas and ochre deserts.
Jupiter: (very useful) to be able to observe blue-tinted cloud formations.
Saturn: to be able to establish the blue-tinted cloud formations.

Green filter (nr. 56)

Moon: to increase contrast between lunar features in various light conditions.
Venus: to view the cloud patterns.
Mars: to increase contrast of the polar caps and to be able to observe frost.
Jupiter: to enhance visibility of the big red spot.
Saturn: to be better able to observe the white elements in the atmosphere.

Light blue filter (nr. 82A)

Moon: to increase contrast between lunar surfaces.
Jupiter: enhances the boundaries between the red belts and the adjacent bright zones.
Mars: useful during violet clearing and when studying surface characteristics of polar caps.
Saturn: improves low contrast details of cloud formations.

Light yellow filter (nr. 8)

Moon: to improve contrast and to reduce irradiation between lunar characteristics (suitable for telescopes under 127mm).
Venus: (slightly useful) for revealing low-contrast banding in Venus’s thick clouds.
Mars: to darken blue and green maria, oases and channel demarcation. In addition, orange desert areas are highlighted.
Jupiter: (somewhat useful) for darkening currents in blue tints and improving details in small orange-red features in the belts.
Saturn: (slightly useful) for darkening currents containing low-blue tones
Neptune and Uranus: (somewhat useful) for improving very subtle dark features (suitable for telescopes of 250mm and bigger).
Comets: to bring out highlights in yellowish comet dust tails and to improve the contrast of comets.

Yellow-green filter (nr. 11)

Moon: to increase contrast between lunar features (suitable for telescopes under 127mm)
Mars: to increase the contrast of polar icecaps, frost areas, low-hanging clouds and dust storms in the deserts. This filter also highlights boundaries of yellow dust storms.
Saturn and Jupiter: contrasts blue and red features.
Neptune and Uranus: (slightly useful) for improving very subtle dusky features (for scopes of 250mm and bigger).
Comets: to bring highlights in yellowish comet dust tails to the fore and to improve the contrast of comet heads.
78% transmission

Violet filter (nr. 47)

Mercury: (somewhat useful) for improving observations of rarely visible vague surface features (suitable for scopes of 200mm and bigger).
Venus: to improve contrast of faint dark shadows of the upper cloud sheet.
Mars: to detect high clouds and mist above the polar icecaps (suitable for telescopes of 200mm and bigger).
Jupiter: to enhance boundaries between the reddish belts and the adjacent bright zones in the upper atmosphere.
Saturn: to enhance the ring structure (for telescopes of 200mm and bigger)
Comets: for observing brighter comets (suitable for telescopes of 200mm and bigger).
3% transmission