While going through the basement, putting-away the Christmas decorations, I found an elliptical flat I've had for years, with a 9-inch minor axis. I've thought about using it for an 8" telescope mounted like the 9" Harvard refractor on the "Gerrish" mount. In this type of mount, the optical axis is co-axial with the polar axis and different declinations are observed with a flat mirror in front of the telescope. The telescope is pointed "down", or facing the south celestial pole. This means that, if using a refractor or Cassegrain, the eyepiece remains in a fixed position. It can be on the inside of a heated building, with the flat on the exterior. Only the flat needs to rotate in RA to keep an object centered, but typically the entire optical train is made to rotate with the flat, to make some engineering details a tad easier. Either way works fine. DSC's make finding objects relatively easy, since an optical finder would be quite a complication on this design. Has anyone built such a design? I've seen it in S&T over the years but never a locally made version. S&T even had a 16" Newtonian version featured about 20 years ago, IIRC.
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Chuck Hards