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Your new Orion Premium 20-Piece 1.25" Color Planetary Filter Set
will add versatility and viewing pleasure to your astronomy experi-
ence. This set contains 20 color lters and a metal storage case.
Please read these instructions thoroughly for proper use and care
of the lters.
Color Eyepiece Filters
Color lters will enhance your visual and photographic observation of the Moon
and planets, allowing you to see greater contrast between planetary details of dif-
fering colors. Some lters offer additional uses such as enhancing structure detail
in galaxies, reducing unwanted false color from achromatic refractors and terres-
trial observing at dawn or dusk.
How They Work
Planetary surface details and atmospheric phenomena reect sunlight as con-
trasting colors which we see as details on the disc of a planet. A color eyepiece
lter passes (transmits) a specic color of reected light and blocks (reects) their
complementary colors: for example, red. Passing red will reveal detail of a con-
trasting color, blue, in this example. This lightening of similar colors and darkening
of contrasting colors enhances the detail that you see. Color lters do not actually
increase the level of detail, they merely make it easier to see.
Figure 1. Comparison illustration of using lters for planetary observation.
Attaching the Filters
Filters require a 1.25" telescope eyepiece that can accept threaded lters. Any
Orion 1.25" eyepiece will work. Simply thread the lter into the eyepiece barrel until
it is nger tight.
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