I am sorry for yet another Carina Neb but it is a good test object. The Moon was full so I had to find something to image well away from it.
Exposures in 3nm NII, 15x1 min, 10x4 min and 7x16 min. Used these three exposure stacks to tone map a HDR.
Full res image 6 MB FoV 3.5 x 3.5 degrees.
http://d1355990.i49.quadrahosting.co...AR_NII_HDR.jpg
The extra detail visible made it a worthwhile exercise.
Bert
Astrograph is an Officina Stellare RH200 which has a focal length of 600mm and is F3, yes F3! Clear aperture is 200mm.
FLI Atlas Focuser.
FLI ten position filter wheel CFW-3-10 with 50mm square filters.
Astrodon E series LRGB and HA, NII, SII and OIII 3nm NB filters. Also a continuum filter 5nm.
Camera is a FLI PL16803 which has a sensor size 36.8 X 36.8 mm.
The FoV of this system is 3.5 X 3.5 degrees.
Mount is a Software Bisque PMX.