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5mm eye relief and twist-up eyecups for comfortable viewing
which include step-by-step instructions for modeling
The autobiography of Mike Weasner describes his journey through the Universe that began in southern Indiana
The L-Pro filter has a very low transmission loss for celestial objects with a uniform spectrum and is therefore very effective in suppressing light pollution sources
two-lens ED refractors or even achromatic lenses
Counterweight Set for Truss Tube Telescope DOB solar eclipse 5mm eye relief and twist-upThis set of counterweights attaches to the rear of the primary mirror box with included nut and washer. Simply remove the rubber stopper and insert shaft through and attach with nut and washer. Includes 2 2. 5 lb counterweights.
