Re: [APML] R200SS flattener question

["Bobby Middleton" <bobm@koyote.com>]

John I've done this setup on a homebuilt 8" f/4.25. I used it above a
lumicon CC and Lumicon 2" OAG in hopes of improving vignetting.
It won't fit a 2" focuser and it needs the 60mm direct wide adaptor IIRC. I
used an AP 2.7" newt focuser with a machined adaptor to fit it to my setup.
Everything worked well but I used a 2.7" OAG. That put the guidestar waaaay
off-axis. It had to be at exact focus for the st-4 to guide and the
guidestar was basically a seagull except at critical focus. I consider
myself lucky to have gotten it to work. But it's very do-able; especially if
the guy is going the seperate guidescope direction.........then all he'll
have to worry about is flexure.
Bobby Middleton


----- Original Message -----
From: "John C. Mirtle" <spampit@shaw.ca>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Sunday, November 23, 2003 2:41 PM
Subject: [APML] R200SS flattener question


> A quick question for the       guru's out there.... A friend of mine is
> curious about the R200SS field flattener, and is wondering if it can work
> with another Newtonian. All the literature out there seems to indicate
that
> you need a direct-wide adapter to make it fit on a scope, but what is not
> clear are diameter of the pieces. Will the flattener fit inside a 2"
> focuser, or is it 60mm like many of the       accessories? If it does fit
a
> 2" hole, will it thread onto a standard T-ring? Thanks!
>
> John Mirtle
> Calgary, Ab. Canada
>
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> Astro-Photo@seds.org
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