The Earth's atmosphere refracts light of different wavelengths to a different degree, depending on an object's altitude above the horizon, hence declination dependent. I.e., the Earth's atmosphere acts as a prism.
Consequently, objects at the zenith will not have this effect, since the light from that position are perpendicular to the Earth's surface (and atmosphere) at that point.
This image shows the effect of atmospheric dispersion by the lower edge displaying a red tinge and the upper edge a bluish tinge.
The next 3 images show the individual frames after separating the channels using Michael Unsold's venerable ImagesPlus ( http://www.mlunsold.com/ ).
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| Red channel |
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| Green channel |
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| Blue channel |
The image below is a GIF showing the vertical displacement between the individual RGB frames.
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| 3 frame GIF |
Finally, the result of aligning then recombining the individual frames, again, with ImagesPlus.
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| Result of colors split, aligned and recombined |
With compliments to Mike.
For camera conversion services, i.e., having your DSLR "IR Modded" (IR filter removed), visit Life Pixel Camera Conversion Services here
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