I've added a considerable amount of data to the RH-200 view of the Horsehead. This is a 100% resolution crop from the STL1100, representing about 1/4 of of the entire field - I like this composition but also good to show full res capability of this little instrument at 9um pixels.
Data:
Officina Stellare RH200 f/3 Riccardi-Honders
STL11000
6nm Ha filter
35 x 600s total exposure time.
Non linear curves and levels only in PS - I only spent about 45 minutes working the data.
Star Spike sofware
San Jose, California
Comments:
This instrument can benefit from longer exposures in narrowband. 20 minutes in a rural location would be quite spectacular for signal gathering. This really needs more urban light pollution blocking. 3nm might be best here.
I am finding this instrument to be quite stable with temperature changes. Absolutly no focus shift.
No differential flexure in a test 40 minute sub from the city using the STI guider assembly.
Need smaller pixels!!!
http://img26.imageshack.us/img26/681...dnewcroppe.jpg
and here is a 50% resolution of the entire field. Curves adjusted a bit to show the extent of the nebulae
http://img812.imageshack.us/img812/8...dnew50perc.jpg