1 x Astroscope. So the FRA series is among the few versatile and quality astrophotographic devices in the current astronomy market. - The FRA400 quintuplet astrograph has adopted modern optical design with a retractable dew shield, a 3" rack-and-gear-based high-precision reducer containing a 360-degree rotator, M68×1 thread, a 2" adapter ring and a 1.25" visual adapter.
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