M42 The Great Nebula in Orion taken through emission line filters

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R=Halpha

G= OIII

B= Hbeta

Ha: 12 x 30 sec (Cust Sci 3nm Ha filter)

OIII: 10 x 30 sec (Cust Sci 3nm OIII filter)

Hb: 14 x 30 sec (Cust Sci 3nm Hb filter)

Click image to enlarge

R= Halpha

G= OIII

B= Hbeta + 60% * OIII (stretched to 16 bit)

Ha: 12 x 30 sec (Cust Sci 3nm Ha filter)

OIII: 10 x 30 sec (Cust Sci 3nm OIII filter)

Hb: 14 x 30 sec (Cust Sci 3nm Hb filter)

Click image to enlarge

R= Halpha + Hbeta (stretched to 16 bit)

G= OIII

B= OIII

Ha: 12 x 30 sec (Cust Sci 3nm Ha filter)

OIII: 10 x 30 sec (Cust Sci 3nm OIII filter)

Hb: 14 x 30 sec (Cust Sci 3nm Hb filter)

 

 

Click image to enlarge

Ha only

Ha: 12 x 30 sec (Cust Sci 3nm Ha filter)

Click image to enlarge

OIII only

OIII: 10 x 30 sec (Cust Sci 3nm OIII filter)

Click image to enlarge

Hbeta only

Hb: 14 x 30 sec (Cust Sci 3nm Hb filter)

Images taken on October 5, 2002 at Coyote Lake County Park, Gilroy, California

Imaging Scope: C14 @ f/11 (F=3910mm)

Imaging Camera: FLI IMG1024S @-25C

Tracking Scope: TV101 with Televue 2X Big Barlow (F=1080mm)

Tracking Camera: SBIG ST7E @-10C

AP1200GTO Mount

FLI CFW1 filter wheel with Custom Scientific Narrowband (3nm) Hydrogen Alpha, Oxygen III and Hydrogen Beta filters

Optec TCF-S focuser

Maxim DL 3.0.7 used for image capture and image calibration, FocusMax used for focusing, Sigma beta 10 used for darks, flats, image stacking, Photoshop 7.0 used for color combine/touchups.

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