Bought for my Pentax K10D, this card is fast enough to shooting in burst or braketting MODE RAW (the highest resolution and the heaviest weight file)! But it only slightly DNG With 8 GB volume RAW files is no longer a problem at all but after six months of use and more than a thousand pictures I had a problem deleting files between two shots: this card supports fragmentation at all and I lost some RAW shots. In contrast with smart recovery PC I could get my Jpeg. So caution, do not delete files during the voyage and reformat the card on PC after transfer. Check often replay during shooting and avoid using it for critical applications. So I see my notes down!