The 1Ds also fares very well against medium format. Is it sharper than 645? No, not quite, but really very close. When you add in the extremely low noise of the images compared to scanned film, and add in all of the cost and workflow advantages of shooting digital over shooting and scanning film, in my opinion the 1Ds is to be preferred. I'll gladly take the huge reduction in noise (grain) over slightly lower overall resolution any day of the week. Thomas and Chris basically have concurred with this finding after reviewing many sample images that we shot together.