Re: [ATM] 8" F/4.2 progress

[Michael Peck <mpeck1@ix.netcom.com>]

At 11:07 10/27/05, Richard wrote:
>Hi Mike,
>
>Thursday, October 27, 2005, 4:32:16 PM, you wrote:
>
>ML> Foucault probably gives the best balance of info of all three
>ML> qualities for a beginning mirror maker - at least that's what I think.
>
>Others would argue that a simple mask and a digital camera or
>webcam, and Jim Burrows excellent Hartmann program is both easier
>and more accurate...
>

With all respect to Jim, what empirical evidence exists to support 
that argument? How many people besides Jim Burrows have even tried it?

Now if I were going to argue for a "simple" test methodology of more 
or less known accuracy I'd suggest building a Bath interferometer. 
That's not the most practical idea for a one-off project, but it's 
certainly doable by any reasonably dedicated ATM.

Mike Peck


_________________

Michael Peck
email mpeck1@ix.netcom.com
Wildlife photoblog! http://wildlife-pix.com
Amateur telescope making http://home.earthlink.net/~mlpeck54/astro/astro.html 

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