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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
9 kg Viewfinder 6x30 or 7x50
corrects field curvature and preserves accurate star colour — resulting in tight star profiles across the field
EFW2*5 or FW2*7 body
native 16-bit ADC
significantly improving contrast
Askar 91F APO Refractor (91 mm f/5.6 Flat-Field) – Dark Clear Skies Helmet Camera 9 kg Viewfinder 6x30 orAskar 91F Flat Field APO Astrograph The Askar 91F is a powerful 91 mm f 5. 6 flat field apochromatic refractor designed for deep sky astrophotography. With its FRA series Petzval optical design, the 91F delivers a native flat field and pinpoint stars across APS C and full frame sensors without needing an additional field flattener. Key features Aperture: 91 mm APO optics with ED glass. Focal length: 500 mm at f 5. 6 balanced between wide field and
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