Brand: SharpStar

Askar 2.5" F/3.9 Full Frame Reducer for FRA400 (RFRA400/ASKAR7256RD )

ASKAR7256RD

Brand: SharpStar

Askar 2.5" F/3.9 Full Frame Reducer for FRA400 (RFRA400/ASKAR7256RD )

ASKAR7256RD

Special Order
$336.15 CAD

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Special Order
$336.15 CAD

Easy Payment Options with .

How do I Special Order?
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Product Description

Askar provides a brand-new F/3.9 full frame reducer for FRA400 astrograph, further reducing the focal length and thus shortening the exposure time on its original 400 focal length and f/5.6 focal ratio design basis. The reduction factor is 0.7×, and the reduced focal length is 280mm, which can satisfy most deep-sky astrophotography. The back focus is standard 55mm. The reducer has built-in M48×0.75 thread, allowing for the attachment of 2" filters.

This reducer also works with the FRA500

Customer Reviews

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H
Hector

The optic is performing as expected

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