Re: [APML] Guiding (was M101)

["Greg Hartke" <ghartke@adelphia.net>]

Hi, Steve,

Ouch. I knew the ST-4 pixels weren't square but I thought they were only 
slightly larger than those of the STV.

I will say this: I have to think that a 60 mm f/10 guidescope (assuming you 
use a 2x barlow) has the potential to guide for you with no trouble at all. 
Keep in mind, of course, that when you add extra elements, you add to the 
possibility of differential flexure.

Good luck!

Regards,

Greg

----- Original Message ----- 
From: "Steve Lindsey" <stevelindsey@earthlink.net>
To: <astro-photo@seds.org>
Sent: Wednesday, May 04, 2005 7:08 PM
Subject: Re: [APML] Guiding (was M101)


> Thanks for framing and asking the question Greg.  I'd like to hear the 
> answer.  I make matters worse I think the ST4 pixel size is about twice 
> what you're using below for calculations so I doubt the answer will favor 
> that low of a fl guidescope.  Would love such a light weight set up but 
> can't justify the expense of an STV.  Maybe it would work with the ST4 and 
> a doubler on the BORG?
>
> Steve 

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