This is a bit noisy attempt at getting more filamentary detail in the crab, by shooting the luminosity exposure with the red filter. This it is a "RRGB" exposure. I think more can be had in the future by increasing the number of luminosity frames. One of the two close stars in the middle is the supernova progenitor.
Instrument: 12.5" f/5 Newtonian CCD Camera: SBIG237 Exposure: L=40mins with Red, R=10m, G=7m, B=12m (Binned 2x2) Filters: RGB Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing 7/10, Transparency 6/10 Temperature: 25 F