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Re: [APML] New SBIG Cameras
Yes, the NABG cameras have a higher QE, because the anti-blooming gate covers about a third of each pixel. I _almost_ had an opportunity to use an ST-8i in Australia last November but the weather was cloudy for three of our four nights and we were too tired on the other from jet lag and beer/wine to do any serious work. The i cameras don't have an autoguiding chip like the other SBIG cameras do, so you have to limit yourself to short exposures, use a separate autoguider (ST-4, STV), or use a mount with low enough periodic error to not require guiding (Paramount ME).
I bought an ST-10XME a few months ago and have been learning to use it, after a bumpy start (bad connection between camera and filter wheel, bad imaging chip which had to be replaced, wrong type of autoguider cable supplied with the camera). I only recently figured out the problem with my autoguider cable, so I was limited to one-minute exposures with my Vixen 102-ED on my G-11. You can still get good results with short exposures by adding or Sigma-combining them.
Alson
----- Original Message -----
From: "Jerry Lodriguss" <jerry@astropix.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, April 08, 2003 10:46 PM
Subject: Re: [APML] New SBIG Cameras
> Hi Alson,
>
> So the NABG cameras have higher quantum efficiency?
>
> Do you know anything about using the the ST7i camera for astro work?
>
> Jerry
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