The Trapezium is seen at the center of M42. Gadgets: Sigma Telephoto lens 150-500mm at 500mm FL, with two EOSs, EOS Rebel XSI and T3, both modded, 0.5,2,4,8 minute exposures (4~8 frames each) at ISO1600 with XSI and Orion SkyGlow filter and, 2 min. x 25 frames at ISO3200 with EOS Rebel T3 with IDAS LPF P2 Note 8 minutes frames were discarded due to drift. The processing was not easy due to the difference in the transmission spectra between the Orion and the IDAS filters.
2013-3-2 7:08 
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