[ATM] Looking for sources for diagonal mirrors

[vorblesnak@peak.org]

The math on the 16 inch seems to suggest a 3.24 inch diagonal to a 3.5
inch diagonal ..

11.5 inches from diagonal to the focus. 16 inch diameter of the primary,
55.5 inch focal length.  11.5 x 16 / 55.5 = 184 / 55.5 = 3.31 inches.  20
percent of the primary diameter is 16 / 5 = 3.2 inches.  I figure a 3.5
inch diagonal would be good, common size, cover the sweet spot .. can't
find one.  I would like a thin one if possible.

No pictures yet, but I am working on it.  I did set it up with a three
inch diagonal I had.  No astro virewing, clouds, but I did look at
terrestrial objects.  It looked pretty good.

David Davis
Toledo, OR

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