M42 Composite with Statistical Filtering

This image is a combination of a prime focus image and a barlowed shot of the core area. A statistical filter that I've been working on was used for all noise reduction and no masks were used during any noise reduction passes.

Object The Orion Nebula Object RA 5:35:16 Dec -5:23:01
Exposure 40 minutes (10 X 4 minutes) for the outer areas and 400 seconds (20 X 20 seconds) for the core
ISO 1600
Camera Canon Rebel XT unmodified DSLR, Canon 60Da used for core data.
Optics Prime focus of a 200mm SkyWatcher f/5 Newtonian reflector with a Televu Paracor for a total focal length of 1150 mm. A 2.5 times barlow was added for the core area.

SCO, St. Croix, Nova Scotia


Calibration, stacking done in Images Plus, noise reduction using statistical filter applied before stretching. An arcsinH stretch was applied keeping the histogram from clipping at the low end. The feature mask  tool was used to split the stars from the image. The nebula layer was stretched and noise reduced again. The red and blues were boosted using additive colour balance and masks. Multi-scale decomposition was used to sharpen the nebula layer and the star layer was recombined with the nebula. The whole process was repeated on an image of the core then
a LMS combine was used to maintain the full detail from both images. The contrast was enhanced using a masked curve. The same statistical filter was used to further noise reduce the image. RL deconvolution was used to sharpen the fine detail.