Re: [APML] Vignetting in the Astro-Physics 130EDT with Telecompressor

[Aplanatic@aol.com]

Hi Joe,

> Excellent analysis.  I wish telescope manufactures provided this sort of 
>  analysis.  Does each curve represent the vignetting from a given 
>  restriction if there were no other restrictions in the light path?  Is 
>  it possible to generate a curve showing the vignetting due to all of the 
>  restrictions?

If Jerry doesn't mind, perhaps I should field this question.

Yes, each curve represents the vignetting for that aperture when no other 
aperture is present.  When all three apertures are in the optical path the 
transmission profile is the minimum of the three individual curves.  

-Dave-
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