Purple ring around subject, Nikon?
I know there's nothing wrong with my camera, but I'm just curious as to the mechanics of why this happened.
Today a took a photo of my mom's peacock. It was sunny with bright white snow as the only background. His neck is a vibrant, brilliant blue and there's a narrow purple band between his neck and the featureless snow in the background. I was using a 30 year old Spiratone 400mm and my Nikon D40. My photo was overexposed somewhat, especially for the background but I still have good detail of the feathers on his neck. He was in such a hurry to get away I didn't get a chance for a second photo with different exposure. Anyone know why this phenomena occurs?
That is called chromatic aberration, or CA for short. It occurs with many lenses in very high contrast shots, especially older lenses that were not designed to be used with digital cameras. You can read more about it here:
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