To: atm{at}shore.net
From: MLThiebaux 
Reply-To: MLThiebaux 


>
>I made a 1.6" minor axis diagonal that had smooth
>.25 wave convexity and no TDE in 650nm and used it in a 9.6"f/7.4 newtonian.
> With  this diagonal, the scope tested with obvious astigmatism in a star
> test at 309x. I also performed a star test by fixing the diagonal at a 45
> deg, angle in front of a stopped down 6" newtonian and saw the same amount
>of oval deformation at 360x.
>
...
>Dan Chaffee
>

What is the diagonal-to-image-plane distance in the 9.6" newtonian?

Martial Thiebaux
Rawdon Hills, Nova Scotia

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