RedCat 51 backfocus measurement tool for ZWO ASI 6200 MM/MC Pro
Description
This is a tool to measure the backfocus distance of a ZWO ASI6200 MM/MC Pro camera attached to a Williams Optics RedCat 51. The backfocus distance is the distance of the focal plane to the back side of the telescope. In case a filter wheel and an off-axis guider are installed as well, measuring of the backfocus distance is difficult due to the geometry involved. This tool fits to the geometry of the ASI6200 and is not blocked by the filter wheel and off-axis guider.
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