robin_astro

Yep, that should work in principle, attached to the telescope in place of the eyepiece,  for bright stars.  I began my jouney in to astronomical spectroscopy and the development of the Star Analyser

http://www.patonhawksley.co.uk/staranalyser.html

 in much the same way back in 2002

http://www.threehillsobservatory.co.uk/astro/spectra_1.htm

(first light)

You will need to remove the webcam lens and space the grating around 25-30mm away from the camera sensor to give a decent length spectrum and to explore into the IR, remove the IR block filter

Good Luck!

Robin

www.threehillsobservatory.co.uk