Just got this on eb..... It has a field of view of 195 degrees into an image circle of 8.5 mm. The GstarEX has a diagonal of 8mm so should get about 150x114 degree FOV. Tell me it was too good to pass up!
http://cgi.ebay.com.au/ws/eBayISAPI....B:EOIBSA:AU:31
I hope to use it for meteor shower images. Could also be used for 'whole' sky monitoring. Note no tracking needed.
Bert