High speed CF cards, i use these exclusively. Circuit City has them for $64.99 before $15 mail in rebate (only 1 per household but $65 ain't bad for these anyway). great cards for 5 or 6 mpix digicams. i get 80 shots per card in RAW plus small jpg or about 73 in RAW plus medium jpg (i think). will get about 135 large, least compression jpgs on a 10d or digirebel.