Re: [ATM] 8" F/4.2 progress

[Dale Eason <atmpob@yahoo.com>]

I tried it.  It was not easy to make the mask for a
16" nor was it easy to create and setup the artificial
star and align everything.  Needed a camera that you
could remove the lens if I remember right and
adjusting for correct lighting conditions was tedius
for my setup.

I gave up and and built the Bath interferometer.

Dale Eason

--- Michael Peck <mpeck1@ix.netcom.com> wrote:

> 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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> 



	
		
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