Askar’s f/3.9 Full Frame Reducer for the 108 mm FRA600 Quintuplet Astrograph!
This reducer from Askar pushes the performance of the FRA600 even further. With a 0.7x reducing factor this full-frame reducer shortens the FRA600 108 mm Quintuplet APO Astrograph’s focal length from 600 mm down to 420 mm, allowing you to fit more in frame!
Purpose Built for Faster, Full-Frame, Imaging
This reducer has been designed specifically for the FRA600, packing in four elements to maximize capabilities of the big aperture Flat-Field Refractor Astrograph offering from Askar. This reducer makes the already spry f/5.6 FRA600 even faster, dropping the focal ratio down to f/3.9 while still providing full-frame coverage!
Designed with One Scope in Mind
This Askar f/3.9 Full Frame Reducer was made just for the FRA600 108 mm Quintuplet APO Astrograph. Rest easy in the knowledge that this reducer is purpose built to bring the most out of your telescope!
More Performance, Without Full Frame Compromise
Focal reducers shrink your image circle as a side-effect of how they work, it’s just physics. However with this reducer you don’t have to worry about losing some of your image, as Askar has packed in all the f/3.9 Full Frame Focal Reducer’s extra performance while still maintaining flat-field full frame coverage.
Easy Installation
As this focal reducer is purpose built for the FRA600, it should come as no surprise that installation has been made easy. Simply thread the reducer onto the M90 x 1 mm connection on the back of the FRA600, install your camera at the industry standard 55 mm backfocus distance, and go!
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