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Off-Axis Reflector Astigmatism

Started by pwp818, 02/24/2007 12:41PM
Posted 05/31/2021 11:54PM #10
I have a 6.5” ATS DGM Telescope.

My focuser is square to the tube.  My secondary, required tilting for the laser to hit the center of the primary.  This can be done by shimming of the secondary bracket, or bending the stalk.

One has to be very careful that the secondary does not block the light of the primary, which happens if the secondary bracket is too high.