Orion star trails through spectroscope

Orion star trails through diffraction filter SA100. Spectrum of hot Rigel is different form colder Betelgeuse. Spectrum of M42 Orion Nebula is distinct from contiguous patterns of star spectra. See more about astronomical spectroscopy and stellar classification at http://en.wikipedia.org/wiki/Astronomical_spectroscopy and http://en.wikipedia.org/wiki/Stellar_classification

A - single shot; B - composition of 46 images; Lumix LX3 - SA100 diffraction filter - 60mm lens - ISO400 - f/2.8 - 25 seconds.