Webcam spectroscopy set-up. The Star Analyser is a simple ***** on grating that can be used like any astroimaging filter! This is shown along with an additional spacer to allow for an optimal grating to ccd distance. See the discussion "basic spectroscopy set-up" under Spectroscopy in the forum. The camera used here is a high frame rate Skynyx (lumenera) camera with a long exposure option.