leaf aptus 75S digi back Impressed me the most with its shadow quality (good details, low noise), my main issue with digital...but its still not film. Faster than most backs but still a different way of shooting than the normal mark II, the 54S is .87 fps which is the fastest I believe...an 8 gig card holds about 130 shots- each battery also lasts about 130 shots which is a bear in itself...if you want to get the full speed of shooting you have to use sandisk extreme IV cards. I used it on a blad H2. Those of you familiar with hasselblads will know they are fairly uncomfortable for some to use; leaf is developing its own camera for release in the next 6 months which has an adjustable grip (yay!). I personally like the H2 but think it could be better...focusing back to back between the blad and a mark II was interesting, canons insanely fast and accurate AF system shines so bright...the touch screen is nice, but sooooo slow- especially when chimping or zooming into your shots to see if they are in focus- its like looking at porn on a 14.4 as you stare at the leaf logo. I can't wait for 5 years when everything is fast wireless (tethered = ) Where it really suffers is on the back end, or the assistant/digi techs job...at 39mp the files are huge, and you have to convert them to get them to read in most normal RAW readers. If you are doing some fast paced shooting (is that possible at 1fps?) you are SOL, it takes so long- 130 shots per battery is like...yikes...when you do 2k+ shots a day. Leafs software is nice for simple color touch ups etc but anything serious you need to get it into cs3. You also can't shoot +jpeg which kills for giving clients day of pictures. None of this review is interesting or pertains to anyone on this site? so whych camera is bettar , d50 or d40x? How many borders would you put on your photoz when u post on intraweb?