I have a Sandisk 1Gb standard CF card and a Lexar 40x 1Gb CF card. I've just been testing the relative performance before buying another card, and have found them to be virtually identical.
I was testing by firing a full series of 5 shots to fill the buffer, and then timing how long untill I could take the next shot. In each case it was about 10 seconds. My immediate reaction is that the *istD can't handle cards faster than standard. Other alternatives are that Sandisk cards are inherently faster than Lexar, although I'd expect to see some difference giving the different ratings, or that the whole 40x/66x/80x/etc thing is a big con. Anyone else tested different cards in the *istD? Nick
