Re: [APML] Field flatness with f/8 refractor

["Chris Cook" <ccjd@ix.netcom.com>]

If it's flat across the 35mm frame, then there's no need.  If it ain't
broke, don't fix it. :-)
You could use the Tak f/6 FR to get the faster f/ratio if you want.
I use the FS102 with the Tak FR to shoot at the faster f/6.

Chris

----------------------------------
Chris Cook
Astronomical & Nightscape Photography
www.abmedia.com/astro

-----Original Message-----
From: Phillip Jones <starfest@comcast.net>
To: Discussion of Film Astrophotography <astro-photo@seds.org>
Date: Sunday, December 14, 2003 11:57 PM
Subject: [APML] Field flatness with f/8 refractor


>In my brief experience with film imaging using a 128mm f/8 refractor
>(FS-128), I haven't seen any issues with field flatness on 35mm film. I do
>own a Borg field flattener, but have not used it. Question is this:  should
>I be using it?
>
>Thanks,
>-Phil
>
>
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