Iris Nebula (NGC 7023)

clic for 50% size 1946 x 1295 (753 kB)


About this Image

The rather small Iris nebula in the constellation Cepheus is a reflection nebula embedded in extremely faint dark dust.
North is left.

Below you find a crop on the center of the Iris nebula in 100% size.


Technical Details
Optics

105mm TMB refractor with flattener at f/6.5

Mount MK-100 GEM
Camera SBIG STL-11000M at -25C, internal filter wheel
Filters Astronomik LRGB
Date Sep 20 - Oct 10, 2004.
Location Wildon/Austria
Sky Conditions mag 5.5, changing transparency, temperature 10 C,
Exposure LRGB= 160:30:30:30 min (10-minute sub-exposures).
Processing Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus;
Photoshop: unsharp mask for bright areas, blur for dark areas, complex gradient removal, color balance;