lbrandt79 wrote:
Not trying to be flippant but I rarely fill up a card in a day, actually once at an air show but that because I forgot to format it before I went and it was about half full, I used to carry more than one card but do not anymore as my compact flash will give me about 1500 jpegs on my 50 D.
Also, those SD cards are not very heavy :)
I always carry extra cards not because I might fill one up but I would never want to be stuck in a scenario where the card screwed up and I would be left with no card to shoot lol! I always have a camera bag with me so it is not a problem to have extra gear....even if I am hiking I have a back pack.