Rosette Nebula HaOIIIRGB QHY5L-II-M + 550D

[Jannis]

Just about a year ago i captured 1 hour 54 min of Ha data on this target with the QHY5L-II Mono and an Olympus 135mm F/3.5 lens, but only managed to capture a single 2 min OIII exposure. Never the less it was just enough to create a bi-color image.

Last weekend i managed to capture 10x 600 sec exposures with the 550D and the Explorer 200. I felt the unmodded 550D didn't give enough "punch" to it, so i thought i might as well try to blend in some data from my previous bi-color image, even though the resolution difference would be rather huge. More data would probably be good, and preferably a wider FOV, but it still turned out better then i thought and i'm quite happy with it.

RGB: 10x 600 sec ISO 800, Canon 550D, Explorer 200 PDS
Ha: 57x 120 sec, QHY5L-II-M, Olympus 135mm F/3.5
OIII: 1x 120 sec, QHY5L-II-M, Olympus 135mm F/3.5