Currently I have only cheap Castell O-III (which looks like Astronomik O-III clone). I'll probably try RGB with Baader UHC-S stacked in the weekend if the guiding won't loose stars and wind buffets won't attack the scope
DSI III has ICX285, which is very sensitiv CCD, comparable or better than kodaks in cheaper SBIGs etc.
Bin 2 so 4 pixels merged to 1. Gain was about 87%... and working at 27C
Did someone tried helium narrowband imaging?
It has emission lines in blue and yellow (so 0% LP required),