NGC 1491 in Perseus
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Scope: C8  f/5 Location: Blair Valley, Anza Borrego Desert, CA   10 Dec. 2004  Camera: ToUcam SC3

Exposure: 6 x 150  sec and 10 x 75 sec and 12 x 25 sec Luminance Exposure with IR  Block filter. 6 x300 sec H-Alpha Exposure  9 x 60 sec RGB Exposures

Processing: Images were captured in K3CCDTools 2. Aligned/stacked in Registax and saved as FITS. Luminance and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart. The Nebulosity was extracted from HA and then combined with the 75 sec IR  for Luminance in Photoshop - The 25 sec IR was used to minimize some star bloating; the 150 sec IR exposure provided data on dimmer stars for star magnitude depth.  Luminance and Color FITS were combined in Photoshop with Luminance Layering. Color balancing and final touches in Photoshop. SGBNR (PixInsight LE) was used to smooth background noise on  Luminance channel as well as the final result. Image was resized to 800 x 600.

This image was taken at a dark site - the H-Alpha exposure provided some nebula detail and contrast but was almost not needed given the full visible range exposures. This was a guided image.  Horizontal FOV is 16'

 

 

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All images and content remain the property of Jim Thommes - copyright 2003, 2006

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