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Amazon.com: SolarLite Filter for Telescope, fits ETX90, C-90, Questar 3.5, Wm. Optics ZS80II ED, Orion OBS. 70 & Astroview 90, Orion Explorer 90 : Electronics
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Questar 3.5" Duplex, Broadband coatings, Zerodur mirror, factory installed Powerguide III | Astronomics.com
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I always go back to the best small telescope in the world..the Questar 3.5 - Questar Forum - Cloudy Nights
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