Re: [ATM] 32" Focal ratio

[aplanatic@aol.com]

Hi Scott,
 
What is the largest camera you will be using with the scope?  Are you figuring the mirror or is someone else?  Will you be buying (or making) a focal reducer?  How picky are you about the images at the edge of the field?  Do you plan on doing mosaics?
 
-- Dave 
 
-----Original Message-----
From: polaraligned <polaraligned@optonline.net>
To: atm@atmlist.net
Sent: Mon, 01 Aug 2005 18:37:40 -0400
Subject: [ATM] 32" Focal ratio


Hi, 
I am going to be ordering a 32" mirror for a dedicated imager. The 
optical path is going to be folded with a round flat, and the camera 
will be between the primary and the secondary. I cannot afford RC optics so this, I feel, is my best bet. It will be a scope similar to the ones that Observatory Scope makes. I can go anywhere from f/4.5 to about f/8 without the legnth being an issue. Of course I 
want the widest field possible, but I know there are going to be 
trade offs. I am not sure what a custom coma corrector costs 
but I anticipating needing one to obtain the widest fields possible. 
The $64,000 question is: Should I stick with the longer focal legnths 
or will a corrector make this a non-issue? What would YOU do in my shoes and why?  
Thanks, 
Scott 
 
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