Patrick, The magnitude reach of any sensor is also limited by the signal strength in terms of light gathering as measured in radiance (Watts per sq meter per steradian). There are 12.57 steradians in a sphere, 6.27 steradians in half sphere dome and 3.18 steradians in a 90 deg TFOV. As you increase the TFOV from 90 to 180 degrees, the signal per square meter of your camera chip is halved. This may inherently cap the telescopic limiting magnitude of any all-sky camera to very bright objects regardless of the state-of-art of CCD chips. The expensive discontinued SBIG All Sky Meteor cam quoted a TLM of mag 4. http://www.sbig.com/products/allsky.htm (with sample output images) It used an "ST-402ME mated to a 2.6 mm focal length F/1.6 CS- mount lens" yielding a TFOV of 90 x 140 degrees. http://www.sbig.com/products/402_new.htm - Kurt