RE: [APML] Varimagnifier for Om-1

[Alen Koebel <alen_koebel@yahoo.ca>]

Speaking of the Varimagnifinder (which I think is the
correct spelling), does anyone know of anything
similar in the way of a clip-on right angle viewer for
SLRs such as the OM-1 that does NOT magnify the image?
I'm looking for something that will make near-zenith
shots with my barn-door mount easier to compose (the
mount itself gets in the way!).

(My apologies if this message appears twice on APML.)

-----Original Message-----
From: Matt BenDaniel [mailto:matt@starmatt.com]
Sent: Friday, November 15, 2002 10:50 AM
To: astro-photo@seds.org
Subject: Re: [APML] Varimagnifier for Om-1


Steve,

I tried a Varimagnifier on an OM-1 for a few  months
and was never happy with it. It has a restricted
aperture and makes star images very dim. It did not
help me focus. As you may know, if an image is even
slightly out of focus, the detrimental effect is
large. I would recommend some other kind of loupe for
your viewfinder. Or better yet, a knife edge focuser
is IMO the supremely accurate method for focusing film
cameras. Hutech sells KEFs. http://www.hutech.com.
Also http://www.stellar-international.com/.

Here's a couple articles:
http://www.aa6g.org/Astronomy/Articles/knife_edge.html
http://www.astropix.com/HTML/I_ASTROP/FOCUS/FOCUS07.HTM

Matt

At 10:15 AM 11/15/2002 -0500, Steve.Holak@bcitpa.com
wrote:
>Pardon if this is OT, but does anyone know a source
to find a Varimagnifier
>for an OM-1  I just purchased?  I've tried search
engines, but mostly get
>discussion threads on magnifier FOV and personal web
sites describing
>equipment setup, but no resalers or classified
listings.  Are they that
>rare anymore?
>
>TIA
>
>
>Steve Holak
>Senior Software Architect
>
>Brokerage Concepts IS Dept.
>610-491-4879

--
Matt BenDaniel
matt@starmatt.com
http://starmatt.com


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