M1 CRAB NEBULA IN SII / H-a / OIII

(Taurus 5h34m 2200')

Crab nebula SHO

IMAGE INFORMATION
Date:January 28, 2011
Conditions:Windy and a bit hazy (naked eye limiting magnitude ~4)
CCD:FTT1010-M
Optical:Prime focus 25cm Newton, f/D=5.7
Filters:Baader SII, H-alfa and OIII
Exposure:Each color 25x120sec.
Luminance is sum of H-alfa and OIII images
Processing:SII grey scale streched. Intenser parts sharpened