Re: [APML] Presbyopia and Fine Focus

["Bradley" <bhope@thorngarden.net>]

Hi, Jim;

You can still use a knife-edge for focusing a DSLR, and STI <
http://www.stellar-international.com/ > has them. You could get one for your
film camera..then just get the adapters for the DSLR when you get it. The
biggest advantage I see with this over the Hutech, is with the addition of a
rotatable, collimatable prism and eyepiece (which enlarges the image) making
it much easier to use.

Just something to consider.

Bradley

Thorn Garden Observatory
http://astronomy.thorngarden.net

----- Original Message ----- 
From: "Jim Vineyard" <deepskyphotos@hotmail.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Monday, July 25, 2005 11:18 AM
Subject: [APML] Presbyopia and Fine Focus


>   The real answer is to get a Hutech knife-edge but I'm thinking twice now
> about further investment in film equipment.  My general plan is to shoot
> film for the rest of this year (at least) and then probably switch to a
new
> modified DSLR.

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