Re: [APML] Hartmann Mask

["John C. Mirtle" <spampit@shaw.ca>]

Teo,
    You can easily use a mask as well. I have a web page showing how to do
this, just do it without the filters in my example.

http://members.shaw.ca/jmirtle/ha.htm

John Mirtle
Calgary, Ab. Canada

----- Original Message ----- 
From: "Teo Mattas" <t_mattas@hotmail.com>
To: <Astro-Photo@seds.org>
Sent: Monday, January 05, 2004 7:45 AM
Subject: [APML] Hartmann Mask


> Hello group, greetings from Greece!
>
> I have a Zenit SLR camera and a 250mm f/3.5 lens.My problem is that I
can't
> find every time the true infinite focus with absolute accuracy.Will a
> Hartmann Mask solve my problem?I can't ''trust'' my eyes because I have
> astigmatism and wear eyeglasses.What should I do??
>
>
>
>                            Teo
>
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