Re: [APML] New SBIG Cameras

["Alson Wong" <alsonwong@earthlink.net>]

----- Original Message ----- 
From: "Jerry Lodriguss" <jerry@astropix.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, April 08, 2003 11:22 PM
Subject: Re: [APML] New SBIG Cameras


> Hi Alson,
> 
> So the only difference between the ST7 and the ST7i is that there is no 
> guiding chip? Everything else is the same?

Yes.

> I know it's parallel instead of USB, but what else would one have to worry 
> about?
> 
> Does the class 2 sensor make any difference?

My camera has a class 2 chip, which is standard for the ST-10. The ST-7 and ST-7i come with a Class 1 chip standard; the newer Class 2 chips no longer have column defects so as long as you take enough dark frames you should be able to get good results. Check SBIG's Web site for detailed information:

http://www.sbig.com/sbwhtmls/FAQpage.htm#class
http://www.sbig.com/sbwhtmls/indust.htm

If you're thinking of seriously pursuing CCD imaging, I'd also recommend a goto mount and an automated focuser. I have a Gemini for my G-11 and a Robofocus for both my Vixen 102-ED and my C-9.25.



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