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Re: [ATM] Is There a Difference

Richard wrote:

>Hi James,
>
>Thought you may like another reference curve for your mirror
>performance graph. This is a 150mm F/8 Ritchey Cretien with two
>element corrector, and with 'perfect' optics. Nice to see just
>how good it can get, eh? :)
>
>Off Axis deg.   Strehl
>
>
>...
>0.30    0.99992249
>0.40    0.99892977
>0.50    0.99439048
>  
>

Amazing! 99 and 44/100 percent pure!
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