Here is an image from a long time ago. During 2007 I used my complete set of narrowband filters to collect a lot of frames of the central region of the heart nebula, and this is my first attempt to combine them in to a tricolour narrowband image. SII is red, Ha is green and OIII is blue. Some further processing needed to flatten the background, but that can wait until I remember how!
Captured in ArtemisCapture, calibrated in ImagetoolsCa, DDP in maxim, thuggery in photoshop.
Exposure Details :
Coma Corrector Ha 21x600s on 200mm @ F5 with ART285
Coma Corrector Ha 8x600s on 200mm @ F5 with ART285
Coma Corrector Ha 13x600s on 200mm @ F5 with ART285
Baader 8nm OIII 11x1200s on 200mm @ F5 with ART285
Astrodon 6nm SII 14x1200s on 200mm @ F5 with ART285
Curdridge Observatory, Southampton,UK