Hi Ken,
I've just been getting back into spectroscopy after a break, and the images I got were through my 66mm APO with the mono DSI3 attached. The Hydrogen lines showed up really well, with a pixel spacing of 8.7A/px. I took some images of Fomalhaut (A3v) and the Hydrogen lines down to delta + possibly epsilon shwoed up fairly clearly.
I've attached one of the images below.
My issue came about when I tried to process a spectra of delta scorpii, and when corrected with the IR I worked out from Fomalhaut, the processed curve was not a good match for the reference curve.
My other issue has been remembering how to normalise the corrected spectrum, I could never quite work that out!!
Mark