Re: evolving fast.
Yes, Robert, both produce digital images. That's why we need a portable PC and that's why I was concerned about freezing temperatures a few weeks ago. However, some guys in the french astronomy webcam BBS were wondering how long a USB cable could be (between the webcam and the PC) before loss of too much data.
The CCD's are expensive but their costs are shrinking, apparently (after having being stable for years); CCD's do marvelous pictures, true enough. The problem is: my ETX90 ; it's very light, far too lightweighted to withstand the mass of a CCD camera.
Raoul