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"text": "Older pre-2008 Celestron 9
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but you always know what you are getting with Astrodon Narrowband filters - the best performance in the market - guaranteed
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Where is it made
Lumicon 2" diameter × 1" length — Drop-In Eyepiece Extension Tube Counterweight "text": "Older pre-2008 Celestron 9Lumicon 2" Drop In Extension Adds 1" of back focus so your eyepiece or camera can reach sharp focus. The Lumicon 2" diameter 1" length Drop In Eyepiece Extension Tube drops into a 2" focuser or diagonal and accepts a 2" eyepiece on top, pushing the eyepiece back by roughly 1". The larger 2" clear aperture suits wide field eyepieces and large sensor imaging, where it reduces vignetting compared with a 1. 25" light path. Specifications Barrel diameter
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