M17, or the Swan Nebula imaged in HA, OIII, SII and Luminance.
Orion ED80T, ATIK 314L+, Orion Atlas EQ-G
HA, OIII and SII, 600 sec X 12, L 120 Sec X 24, captured with Nebulosity, stacked in DSS and processed in PS CS4 with HA=Red, OIII=Blue and SII=Green. HA and Luminance combined at 50% for L channel.