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A7RII and A7SII
This makes it easy to adjust the rotation of the focuser with minimal observing or imaging interruption
optical length <50mm
46 arcsec Limiting Mag
Simply remove the standard diagonal from the telescope’s focuser or visual back
Askar 0.7X Full Frame Reducer for FRA400C Refractor - FRA400C-RED Explore Scientific OTA A7RII and A7SIIThis triplet reducer is specifically designed for the Askar FRA400C, and will reduce the overall focal length to 280mm and the focal ratio to f 3. 9. Adding the reducer to the FRA400C will still allow full frame imaging and the back focus is a standard 55mm. The shorter focal ratio (from f 5. 6 to f 3. 9) enables the telescope to achieve a wider field of view and faster exposure times, making it ideal for capturing large nebulae, star clusters, as
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