A friend of mine has captured some great lightning shots but in some of his pictures there are green lightning artifacts, or "ghost" strikes while all the rest of his pictures were quite normal. The entire group of pictures were taken within a two or three hour period during a rather normal monsoon storm in Albuquerque, New Mexico.
We were wondering if someone can help us figure out whether there is such a thing as green lightning phenomena, or is it a problem with his camera like a lens flare, or something else. He is using a Canon Rebel XTi with standard Canon lenses.
Thanks for any help you can provide.
Here are links to the pictures: