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Re: Re[6]: [ATM] Chromatic effects visibility

Richard,

> There's some spot plots (splots?) here :
>
> http://www.cncservo.co.uk/RC16_320.JPG    ; 320nm near UV
> http://www.cncservo.co.uk/RC16_480.JPG    ; 480nm F line BLUE
> http://www.cncservo.co.uk/RC16_546.JPG    ; 546.1nm d line GREEN
> http://www.cncservo.co.uk/RC16_644.JPG    ; 643.8 C line RED
> http://www.cncservo.co.uk/RC16_FdC.JPG    ; RGB combined
> http://www.cncservo.co.uk/RC16_1200.JPG   ; 1.2um IR

That really looks impressive. I assume it is flat-field performance 
(Petzvals are similar to both, telescope and corrector, and astigmatism 
seems to be effectively cancelled). Being so effective and easy to make, 
these correctors should be accompanying every RC telescope.

Vlad 


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