Re: [APML] Vixen VC200L Illumination

["Jim Ives" <flyboy9990@earthlink.net>]

Thanks for posting John,  It looks pretty normal.
Jim Ives
----- Original Message -----
From: "John C. Mirtle" <jmirtle@shaw.ca>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Saturday, March 22, 2003 3:00 PM
Subject: [APML] Vixen VC200L Illumination


> List,
>     A few people have been firing me questions about the Vixen VC200L as
> there isn't a lot of good hard info out there. In a nutshell it is kind of
a
> classic cassegrain with an integrated field flattener, with a fixed
primary
> and an external rack and pinion focuser. (8" f9) One question I couldn't
get
> an answer to was how well it lit up a 35mm frame. My G-11 is still
> backordered for it, but I was able to at least attach a camera last night,
> focus to infinity and shoot the twilight sky. I have a full-frame scan
which
> shows how well it lights up the film plane. All I have done is adjusted
the
> levels, I had offset the edge of the frame a bit so that the scan would
get
> right into the corners.
>     There is some mild vignetting, but not too bad for a commercial CAT.
It
> should be very easy to AV images. The scan is here:
> http://members.shaw.ca/spampit/vc200l-2.jpg
>
> John Mirtle
> Calgary, Ab. Canada
>
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