M42 in Orion Imaged in N-II, H-alpha, and O-III

Dates: Sept 16 & 18, 2009, Oct 2, 2009, Nov 8 & 21, 2009
Instrument: Takahashi E180 @ f5
Camera: SBIG ST11K
Guiding: Takahashi FS-78 @ f8 using ST-L Remote
Mount: AstroPhysics AP900 Mount
Exposure: N-II: (Used for Red Channel)
160 Min - 8 X 20 Minutes
18 Min - 9 X 2 Minutes
285 Sec - 19 X 15 Seconds
H-alpha : (Used for Green Channel)
60 Min - 3 X 20 Minutes
22 Min - 11 X 2 Minutes
195 Sec - 13 X 15 Seconds
Oxygen-III: (Used for Blue Channel)
40 Min - 2 X 20 Minutes
28 Min - 14 X 2 Minutes
180 Sec - 12 X 15 Seconds
Filters: ASTRODON H-Alpha, NII and OIII Filters
Capture Software: MaxIM DL
Processed in Images Plus, Picture Window Pro and Photoshop CS
Images for each channel layered in Photoshop to retain core detail
then RGB combined in Images Plus.
Location: My Dark Sky Site in Highland County, Ohio