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the basis of my argument is about 18,000 shots taken with my D800 over the last 6 months or so. The detail is stunning, certainly at a level the d3 or d4 cant get near to.
ive shot landscapes, weddings, motorsport and birds at all apertures and shutter speeds (here in the uk, we are often at high iso and low shutter speeds) and ive not seen any adverse problems. Landscapes at f18, f20 are as detailed, as sharp and free of diffraction issues as ones at f8 - f11.
Using your hypothesis, a 90 megapixel medium format digital back would be almost useless at all apertures and shutter speeds and we all know this isnt true.
The D800 is the first DSLR that can actually get close, and even surpass some, medium format digital backs in quality and thats a fact that has been proven.
The D4 isnt much better than the D3s, the increased resolution is a non issue and iso might actually be a tad worse.
If you dont agree, then thats fine, i can only go on my own findings.
First of all, thanks for responding. Secondly--fantastic images in your photostream!
I agree that firsthand experience trumps measurements and technical reviews. Pictures speak for themselves after all. Unfortunately, tech-speak is the most I have do go on since I don't have any experience with a camera of more than 12MP.
I also don't have much of an informed opinion on MF formats, analog or digital, where I have absolutely no experience, but that may be comparing apples to oranges considing it's a different "optical scenario."
Without my own experience to go on, I can't avoid but be hesitant to believe that it wouldn't be more technically challenging to wring the highest performance out of a 36MP SLR versus a 12MP model. Downsampled to comparable screen resolutions, sure, the point is moot and the higher res SLR will probably demonstrate greater performance overall.
Still, in the cases where I'm "getting away" with marginally slow shutter speeds, it seems natural to imagine that a higher resolving sensor has a greater chance to illustrate the shortcomings of my technique. Naturally though, my greatest shortcomings have nothing to do with the camera's limitations!
Within the experience I do have, sharpness issues are rare when I apply due diligence. In most cases, it appears that the lens is projecting an image on the sensor that exceeds its resolving capability, so if my future experience is similar to yours, that's a rather exciting prospect!
thanks for the comment about my photostream, much appreciated.
and thanks for your reply, i hope you dont think i was just trying to be argumentative, it wasnt my intention.