Horsehead and Great Nebula in Orion
Taken by Nico Palermo on February 11, 2015 @
Canebola (Udine), Italy
Click photo for larger image
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Camera Used: Unavailable Unavailable Exposure Time: Unavailable Aperture: Unavailable ISO: Unavailable Date Taken: 2015:02:22 01:12:56 |
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Details:
The picture is a stack of 24x30s (just twelve minutes of exposure time) shots taken with a Nikon D600 DSLR and a Nikkor 70-200mm f2.8 telezoom set at 200mm.
Despite the cut-off of the DSLR filter in the H-alfa region I was able to improve the quality of the image and some details of the Horsehead nebula using a non local mean filter I've implemented in Matlab and which cleverly reduces the image noise with a weighted average of spatially shifted versions of the original stack.
Photographer's website:
No URL provided.
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