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Re: [APML] OT: Hartmann Mask

Nicola - there is a good explanation in Robert Reeves' book.
Stuart
http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/
Flesherton, Ontario, Canada

----- Original Message ----- 
From: <centaurus_a@virgilio.it>
To: <astro-photo@seds.org>
Sent: Monday, July 05, 2004 4:50 AM
Subject: [APML] OT: Hartmann Mask


Hello All,

I'm very bad at do-it-yourself things but, is there anyone or you knwo any
link on how to build a solid hartmann mask? The one I did once was made
by cartoon and outside in the night it became floppy....:-(
And..which is the best shape to dig for the mask?

regards,
Nicola

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