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8–20mm continuous zoom eyepiece for planetary and deep-sky observing
Power and control are provided via a single USB Type-B cable
High-contrast visual observing with minimal chromatic aberration
it is ideal for lunar observing
Askar 131F Flat Field quadruple Astrograph 1.5mm spacer 8–20mm continuous zoom eyepiece forSelf flattened quadruplet Astrograph which can be used for visual observing and astrophotography. The Askar 131F is a large aperture telescope designed for astronomy enthusiasts, featuring a 131mm aperture, 983mm focal length, and a native F7. 5 focal ratio. It employs a quadruplet optical lens design with three elements in the front and one in the rear, including one piece of ED glass to effectively suppress chromatic aberration. The lens tube
