Amateur Telescope Making
The 12.5 inch - Birch Mesa Observatory Astrograph II
Uploaded 12/5/17
 The final configuration
            of the 12 inch was a strong thermally inert design with strong
            corner poles and lightweight polycarbonate corrigation panels
            on the sides. The new mount made its appearance, an Astrophysics
            AP1200 which tracked fairly well after a year of fixing its design
            issues. The rear mirror cell is removable and can be stored separately.
            
 

            

            
 

            
Taken a few months ago, this is the configuration
that the 12.5" is currently in. We had the mirror
recoated and the secondary as well.  Optically it is
good, but not quite as good as the 10" which is what 
we use primarly now.

Latest 12.5" f/5 Trifid
Photo / Visual

            
Click
            for Full 1290 x 960 size



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