| Photograph Information |
Photographer's Comments |
Camera: Canon EOS-300D Rebel
Location: Kariani, Greece
Aperture: f7.5
Shutter: 3360 seconds (total)
Galleries: Sky, Astrophotography
Date Uploaded: Oct 22, 2007
Viewed: 515
Comments: 1
Favorites: 0
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My last effort of processing the data of 2007 (February 28, April 12, Augoust 22) of the great nebula in Orion's Sword.
52 exposures at ISO 800 and 1600(5x5s +18x10s + 4x20s + 7x45s + 6x60s + 4x90s + 3x180s + 2x240s + 1x300s + 2x360s) were transformed from RAW to 16bit TIFF, averaged and stacked. This is necessary for deep sky objects like this due to its excessive dynamic range, while noise is reduced as well.
All the individual frames were taken with the camera mounted at Celestron ED80 f7.5 refractor telescope (prime focus method), while I used Celestron C8 for manually guiding through a red-cross illuminated eyepiece.
There was of course post-processing (levels, curves, median filter, color balance, star rounding, sharpen, crop 53%, 8bit, resize for web) in order to reduce noise and enhance the details of the nebula.
NGC1976 or M42 as it is better known (the dimmer nebula at the left is NGC1977), lies some 1600 light years away from our solar neighborhood. It is the brightest diffuse nebula and a birth place for thousands of new stars. |
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