RE: [APML] 35 mm Camera & Focuser

["Serge Theberge" <serge.theberge@wti.on.ca>]

John,

I have contacted Herm off-line and he tried everything, including moving the
primary mirror forward.  He told me that he switched back to guidescopes and
finally solved the flexure problem by using an old Meade 80mm f11 all metal
refractor as guidescope coupled with the ST4 autoguider. I found a Vixen 80M
f11 scope for $300CDN including the mounting rings, and he agreed that it
should be perfect for the job.  So both he and you agree that I should drop
the OAG idea altogether for the R200SS and simply get the guidescope.

Thanks again for your help.

Serge

> -----Original Message-----
> From: astro-photo-bounces@seds.org 
> [mailto:astro-photo-bounces@seds.org] On Behalf Of John C. Mirtle
> Sent: Tuesday, December 02, 2003 9:21 PM
> To: Discussion of Film Astrophotography
> Subject: Re: [APML] 35 mm Camera & Focuser
> 
> 
> Serge,
>     The Lumicon AOG probably won't work for you. As I 
> understand it, the flattener screws into the direct wide 
> adapter, with your cameras' T-ring on the other side. The 
> direct wide adapter then threads onto the top of the 60mm 
> focuser. The Lumicon OAG is 2" OD - it just doesn't fit 
> anywhere. If you could make it fit, it adds 7/8" height. When 
> your R200 turns up, put everything together and see how far 
> out the camera is above the focuser. If you have 7/8" or 
> more, then you might be able to do something. I have a 
> picture of the 60mm Vixen OAG at 
> http://members.shaw.ca/jmirtle/files/vixenOAG.jpg . Not a 
> great picture, but it looks to be fairly thick.
>     You don't need all that much of a guidescope for an 8" 
> f4. I found an old picture of Herm and his Vixen at 
> http://home.att.net/~hermperez1/ready_to_start.htm - looks 
> like an 80mm f5 on top....
> 
> John Mirtle
> Calgary, Ab. Canada
> 
> ----- Original Message ----- 
> From: "Serge Theberge" <serge.theberge@wti.on.ca>
> To: "'Discussion of Film Astrophotography'" <astro-photo@seds.org>
> Sent: Monday, December 01, 2003 9:38 PM
> Subject: RE: [APML] 35 mm Camera & Focuser
> 
> 
> > John/Bill/George,
> >
> > Could the Vixen or Lumicon OAG be tweaked somehow instead 
> of changing 
> > the scope configuration? It would be nice if I could do off-axis 
> > guiding with this new scope that I still haven't received yet 
> > (although they are promising that it will arrive by sleigh 
> before the 
> > end of December!)
> >
> > Serge
> 
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> 


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