50200 Double Spiral Star Searching Mirror Integrated Set with Star Bracket

50200, F4 Double Helix Guide Mirror
Caliber: 50MM
Focal length: 200MM
Double helix focusing, stroke: 10MM
Free extension: 20MM
With star guide bracket, 580G
Main mirror only: 450G
Equipped with a pair of six point guiding star rings
One star seeking interface dove tail board