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Celestron color filters are mounted in black anodized aluminum cells with the Kodak Wratten Series Number individually engraved, and come available in 4 assorted kits packed in plastic cases. 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 a lower 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.
The effectiveness of the filters depends on several factors, including: the aperture and focal length of the telescope, the magnification being used, and seeing conditions.
But do your research on eyepiece size. These did not fit our Celestron 80mm spotting scope? Perhaps I missed fine print, but my initial buying scan indicated they'd work. Read morePublished 28 days ago by UrbanMonique
I'm no expert, but these fit the bill for me! Helps immensely with the Neximage 5 MP imager. I also bought the complete set later, but these did the trick until I could.Published 23 months ago by W. E. Weems
My son-in-law is just getting into astrology and the moon, as they just moved to a condo on the 38th floor. He is super excited to try this out.;Published 23 months ago by Nancy
My first time to see thru filters so i can judge the resuts yet but i do know quality seems very good and nice and smooth inserting the threads. Read morePublished on June 25, 2012 by BIG MAC