I really like the small housing. Good for inexpensive waiter eyepieces, but also good for higher quality Plössl eyepieces. A better option could be selected for most PowerSeeker telescopes with 80mm and smaller lenses. The 15mm waiter lens has good eye relief, but it's very difficult to keep your eyes in the right position and the edges are slightly blurred. The 9mm waiter is of better quality and has no eye position problem, but the eye relief is small; without glasses and still had to fold down the eyecups to use it. Separately purchased a 12mm pleated blind, which completely changes the clarity of the picture. (For eyeglass wearers, I would recommend a 15mm lens for proper pupillary relief.) Filters don't work well for most purposes; The smaller lenses (80mm or less) of some PowerSeeker series don't let in enough light to allow the use of filters unless your target is a full moon. Celestron seems to have opted for quantity rather than general use, which might motivate someone to buy more filters from them in the future. The moon filter appears to have a green tint and also transmits 18% of the light; The best moon filter would probably be a 25% ND filter for these small scopes. #80A Blue Planetary Filter - 29% transmission. For telescopes with apertures from 6 inches. 80A should be replaced with #82A: Cyan - 73% transmission. This filter is very light in color and works well for almost all planetary and lunar observations as it does not reduce the apparent brightness of the object but slightly increases the contrast. A good filter choice for small telescopes with 3" to 4" apertures. Red planetary filter #25 - 14% transmission. Best suited for apertures of 8" or larger. Powerseeker range. Look for deep yellow/amber color #15 with 66% light transmission - much better for creating contrast when observing the moon and planets. #15 shows Martian surface features and polar ice caps. Used on Jupiter and Saturn, obscures blue atmospheric currents for better visibility. Kellner's eyepieces do not give a good view of Jupiter and Saturn - they are difficult to focus. 9mm Kellner eyepieces work well on the Moon. Plossl is the best range of eyepieces for observing planets The filters provided work best with a full moon and not for planetary use in the PowerSeeker range In the 80mm eyepiece PowerSeeker f5 Skip this set and buy the 3 recommended Filters (if equipped. PowerSeeker scopes) along with a 15mm super flat and a 6mm "R"ed Line" or "Gold Line" Oku lar. And why didn't they install the CLS filter? Available here on Revain.
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