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