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Old 31-08-2018, 06:03 AM

Kunama is offline
Join Date: Sep 2012
Posts: 3,588
Originally Posted by Billyboy78 View Post
Very much work in progress, and its not very pretty.

The mirror cell is attached to the frame by threaded rod used for coarse collimation, the secondary will have very fine tpi adjusting screws. The light path is directed down through those large bearings to an eyepiece. The FL of the mirror really determines the sequence of events in construction.

The other pic shows the grinding with a fixed post.
That's better impressive project
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