It works like a dream when you know what your doing...
Thanks for the help guys!
Here's my first attempt at a spectrum of Eta Carina with the C11, SA100 grism and ST8i.
Its very noisy - the result of too little exposure I feel. This is one shot, and as my camera is ABG I didn't push it too hard to try to keep it linear (more work to do there to find the limit
).
This 16 bit processing business is pretty new to me so, its baby steps ATM. Any tips gratefully accepted!
This spectrum is a different shape to what I'm used to with the DMK. I think this is more realistic. The Ha line is so strong the DMK can't handle it linearly I think and still get any other detail.
Al.