Re: [APML]: Information Overload

["william propert" <umyangtae@worldnet.att.net>]

Dear James,
I was just reviewing some e-mail that I saved in reference to my choice of
scope and mount.  In your note you mentioned the EQ100 AP mount that is 8
years old.  What mount is equivalent to that now from AP.  Would it take the
900 or could I get stable enough for astrophotos with the 600 if I use the
C11?
TIA
Bill
-----Original Message-----
From: James R. Foster <be686@lafn.org>
To: astro-photo@nightsky.com <astro-photo@nightsky.com>
Date: Monday, January 26, 1998 4:16 AM
Subject: Re: [APML]: Information Overload


>
>Dear Bill,
>
>I believe you should worry more in the choice of mount than the telescope.
>Although it is true that the primary mirror of the C-11 is more prone to
>mechanical movement than the optics of a refractor, these movements are
>compensated for when using an off-axis guider.  Make sure that the
equatorial
>mount you purchase is of reliable repute.  Most of the photographers at Mt.
>Pinos have been using either Schaffer or Astrophysics mounts;  these seems
to be
>the most reliable.  I have used a C-11 on a 100-EQ mount for the last 8
years
>and have had no problems with so-called mirror-flop; even when switching
from
>east-of- zenith through zenith to west-of-zenith. You can check out some
>pictures I've taken with my C-11 scope
(http://www.jps.net/jrfcomet/images.htm)
>or an image of my equipment (http://www.jps.net/jrfcomet/tech/c-11set.jpg).
>
>James Foster
>Correspondence e-mail: be686@lafn.org
>URL: http://www.jps.net/jrfcomet/ast.htm
>Los Angeles, California, U.S.A.
>
>william propert wrote:
>
>>
>> To All:
>> Having almost made up my mind to get a CG-11 rather than an AP 5" EDF on
G11
>> mount, I am now afraid of the C-11 due to all the postings about mirror
flop
>> and the necessity of drilling and modifying the OTA.  Seems I might be
>> better to stick with the AP even though I would like the aperture for
>> observing.  I love all types of observing, but deep-sky photography is
the
>> primary concern.  Your ideas and thoughts are needed.
>> Thanks
>> Bill Propert
>
>
>