See it better!
If you're planning to use your telescope for lunar and planetary observation, you'll need filters. Eyepiece filters are an invaluable aid, reducing glare and light scatter, increasing contrast through selective filtration, increasing definition and resolution, reducing irradiation, and lessening eye fatigue.
Celestron's filters are made of high-quality, solid-plane, parallel glass with excellent homogeneity. They're anti-reflection coated to prevent glaring and ghosting. All also are threaded to fit 1.25-inch eyepieces, and offer a full 26mm clear aperture.
Celestron filters are mounted in black anodized aluminum cells with the Kodak Wratten series number individually engraved. The cells of each filter are double-threaded, so they can be stacked (piggybacked) in various combinations. This allows you to create different color combinations and transmission characteristics, or to have the same color characteristic, but with lower light transmission. When stacking color filters, the effective transmission of the combination you create is equal to the product of the spectral transmission of each of the filters used.
Celestron filters come with a plastic case for safe storage.
4-piece filter kit includes:
Light Red, 25% light transmission
Moon - Improves lunar features. Jupiter - Useful for studying bluer clouds. Mars - Ideal for observations of the polar ice caps and surface features. Sharpens boundaries of yellow dust clouds. Reduces light from blue and green areas that darkens maria, oases and canal markings. Mercury - Improves observations at twilight, when the planet is near the horizon. During daylight, reduces terrestrial sky brightness to enhance surface features. Saturn - Useful for studying blue clouds. Venus - Reduces terrestrial sky brightness during daytime observations. Occasionally reveals deformations of the terminator. Comets - Improves definition of cometary dust tails.
Blue, 17% light transmission
Moon - Enhances surface detail. Jupiter - Enhances boundaries between the reddish belts and adjacent bright zones. Useful for viewing the Great Red Spot. Mars - Very useful during the violet clearing. Helpful in studying surface features, polar caps. Mercury - Improves observation of dusky surface markings at twilight, when the planet is near the horizon. Saturn - Enhances low-contrast features between belts and zones. Venus - Increases contrast of dark shadings in upper clouds. Comets - Brings out the best definition in cometary gas tails.
Green, 24% light transmission
Moon - Enhances surface features. Jupiter - Increases visibility of the Great Red Spot. Useful for observing low-contrast hues of blue and red in the atmosphere. Mars - Increases contrast of polar caps, low clouds and yellowish dust storms. Venus - Useful for cloud-pattern studies. Reduces brightness of blue sky during daylight observations. Saturn - Enhances white atmospheric features. Comets - Useful for observing brighter comets.
96-Neutral density, 50% light transmission - 0.3 density
Moon - Excellent for reducing irradiation, glare and subject brightness. Colors are unaltered, as light is transmitted uniformly over entire spectrum. Planets - Stacking in combination with color filters lowers transmission but retains true color balance for specific applications. Reduces glare on brighter planets and minimizes irradiation. Binary Stars - Helpful in splitting binary stars, because it reduces glare and diffraction effects around the brighter star of the pair.
Shoot the planets with the Celestron NexImage Solar System Imager
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Celestron |
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Filters
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