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Askar F3.9 Full Frame Reducer for Askar FRA400 and Askar FRA500
ASK_RD4-500
339,00 €
Brutto
Askar F3.9 Full Frame Reducer for Askar FRA400 and Askar FRA500 telescopes.
This reducer converts the basic F ratio of F5.6 to a very fast F3.9 for Askar FRA400 and FRA500 telescopes
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Askar F3.9 Full Frame Reducer for Askar FRA400 and Askar FRA500 telescopes
Askar provides a brand-new F3.9 full frame reducer for FRA400 and FRA 500 astrograph, further reducing the focal length and thus shortening the exposure time on its original 400 and 500 mm focal length and f/5.6 focal ratio design basis. The reduction factor is 0.7×, which can satisfy most deep-sky astrophotography. The back focus is standard 55mm. The reducer has built-in M48×0.75 thread, easy for the attachment of 2" filters.
- Correction Optics Type
- Focal Reducer*~Field Flattener
Askar, based in China, specializes in producing innovative telescopes and astrophotography equipment, appealing to a wide range of astronomers. Their focus on compact and portable designs increases accessibility for users aiming to explore astronomy more comfortably.
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