Jeanette,
The 0.05 might be to little sensitivity which would be further cut down by FL of the Lens and the Bayer matrix on the sensor. Usually the 0.05 rating is only archived with a very fast lens. Myastroshop have a new NTSC version of the GSTARX which is relatively cheap. From a software point of view for this type of camera a good one is Astovideo which can do frame integration if the camera is not able to do so. And provide extra integration time for camera's that can only to a few seconds worth of integration on board. You can get it here but you do have to pay for it, 25euro. But last i checked you can try before you buy.
http://www.coaa.co.uk/astrovideo.htm
A good place to look and ask are the Videoastro yahoo group, I found the users quick and fast to reply to my questions.
http://tech.groups.yahoo.com/group/videoastro/
Also Cloudynights have a new section just for Videoastronomy users. Many users have started there own live video channels that broadcast to the internet.
http://www.cloudynights.com/ubbthrea...at/0/Board/VAA
Regards
Fahim