Originally posted by maleek I am not sure 50 or so megapixels will be enough, not unless it has megapixies (tm) under the hood.
No, seriously though. A Pentax MF body would be awesome, perhaps a few years down the road I might afford one.
I think 50 MP is more than enough, until they bump up sensor size. Keep in mind, for almost anything besides portraits, I end up stopping down at least a stop vs what I would use with 35mm film. Vs APS-C, which I shoot side by side with 645 film, I'm usually 2 stops more closed down-- so unless I have a flat-ish subject, I'll be in the f/8 to f/11 range, frequently a little past that. Instead of having a dead limit of f/11, like I do with APS-C, I have a dead limit at halfway between 16 and 22.
Given that, and diffraction, I think we'd see diminishing returns by pushing past 50 MP in the 44x33 sensor size. In print size (200 DPI, which I have used with my 6.1 MP cameras to get 11x14 prints that have no imperfections without magnification) we could get 30x40 prints that would be perfect to the naked eye with your nose in it. Beyond this, we'll start hitting diffraction limits. You do get better results by oversampling and downrez'ing than the opposite, but when you're near the diffraction limits, it isn't *that* big of a difference.
I am not even sure there's a point to pushing too much past 50MP, even in MF and LF photography. On the rare occasion I do scan my 4x5, I never really go past about a 6000x7500 pixel size, even though judging the negatives with a loupe, I should be scanning at at least 2x this resolution to get all the detail.
I think 50MP is plenty until they increase the sensor size, and I'm not even sure more than 50MP is needed, even with a larger sensor.