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Apparent Field of View (Mfg Specified)
ED102 Carbon Fiber f/7 Air Spaced Triplet with HOYA FCD100 optics and Integrated Dew Shield
Eliminates over 90% of the distortion inherent in conventional one-sided planispheres
Lock screw on the side for you to adjust the tension of the holder to eliminate gap
Explore Scientific 2x Focal Extender Barlow 1.25" Flattener Apparent Field of View (MfgA good Focal Extender adds some real versatility to your telescope accessory line up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender to increase
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