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Click to view the Different types of Guide Star Mirror
60240, F4 double helix Guide Star mirror Diameter: 60MM Focal length: 240MM Double helix focusing stroke: 10MM After the free stretch: 20MM With guiding bracket, 800G With one pair of six-point guide star ring Finder Interface board a dovetail Currently on the market compatible with popular guide star CCD security focus, QHY5II, QHY generation, STI, DMK, ZWO, SG4 like.