Several months ago I took delivery of the Officina Stellare RH200 F/3. I've not given up on the fabulous FSQ, as this is mostly more about my interest in very fast systems going back to my long exposure Schmidt camera days. After a multitude of fine adjusments to collimation and tip tilt, I got this official first light last night before the latest storm.
http://imageshack.us/a/img577/4026/r...adbetatest.jpg
12 x 600s accumulated exposure time
6nm HA filter bandpass.
SBIG STL 11000
San Jose, California
This image was shot within San Jose city limits among about a million streetlights. The camera is a first gen STL 11000 and so is the 6nm AD Ha filter. Sky transparency was very hazy. Meaning, that much better contrast and detail are possbile from a dark site, and certanly a 3nm high transmission bandpass would isolate finer structures in the ionization curtain behind the Horsehead.
The telescope mechanics benefit greatly with the incorporation of a tip/tilt back plate, as f/3 is unforgiving of any array tilt. In a way this little instrument is paving the road for the AP 12" Riccardi-Honders due later this year.
cheers
jg