Originally Posted by Bazza

Just to add, that is why you should look at the card speed when buying.A slow card will have an affect on the number of continuous photos in a burst the camera will take as the buffer fills up. I am happy with Sandisk Extreme 111 which is the minium speed I would use.

On memory cards it worth thinking about how many photos you are going to take. If using raw only, the number of pictures is greatly deminished, I would suggest nothing smaller than a 4 gig card.

Now the question do you go out and buy a card with a large memory capacity (16 gig+) or not, personally I would rather buy several 2 or 4 gig cards than one massive memory card for the simple reason apart from should one get damaged, on a long shoot there may well be different subjects taken. So different cards can be used for this purpose.
Bazza