01/03/19What's the difference between Variable Polarizing filter, the Neutral Density Moon filter, and the Moon filter?
11/29/18Why can't I see anything in my telescope when I have the Moon centered in the crosshairs of my finderscope?
05/14/18Smartphone Adapter Tips
11/28/17I accidentally took apart my Celestron 20mm erect image eyepiece. How do I put it back together?
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