Quote (chantal7 @ Sat, Mar 21 2009, 12:05pm)
Nahhh....! You did some 15 second exposures in your other pics, right? Remember? Set it at 15 seconds, then if your camera lets you, change the ISO to the lowest number

Set it down, and while it's lightning, you'll get more than one bolt in the pic, if it strikes within 15 seconds xD.
hmm well I don't think it would work out very good if the thunderstorm happens during the day, correct me if I am wrong but using 15s exposure in broad day light would probably be too much.
Let's hope he will be lucky and get that thunderstorm in the evening :D. Hey! Btw I think that Sigma lens of yours would be perfect for shooting lightning pics because of it's much wider field of view.