There is point to go up in megapixel, as long as the optics can produce the high res, for just one reason: large(r) print
Just say for a 14" x 11" print with 300dpi, effectively, we need at least 4200 x 3300 = 13.44 MP pixel, in totally ideal case. However, owing to the Baylor arrangement of the sensor, actually, the effective resolution in lines (not line pairs) is just around 2400 lines per picture height (i.e., vertically) for the best measured value under the best settings/condition, for the results of many reviews/tests I have inspected.
So, as the K20D has a pixel count of 3104 x 4672, the efficiency is just about 0.77. Hence, if we need to reproduce a true 4200 x 3300 effective resolution for just such a 12R printout, we need a DSLR of effective pixel count of 5455 x 4286 = 23.38 MP!
A 23.38 MP DSLR is just enough for a printout of 300 dpi for a 12R photo! If we want to have 600 dpi or to print beyond 14 x 11, we need more!
Of course, one can say we can keep the viewing distance to be far away enough, but then a 12R photo is not that large indeed so that we can have a closer look (or not just too far away to see the difference), can't we?
Nonetheless, to put even more pixels packed in an APS-C size small format sensor is just crazy, as Samsung has not yet resolved
the ever hottest APS-C sensor (issue) used in the K20D!
Originally posted by mr.voigtlander Maybe they just shot the thing on film and scanned it in!
The obsession with megapixels amuses me when with film you can easily get almost as many megapixels as you want. Want an upgrade? Buy a better scanner, or get a new film.
Yesterday I scanned some film and got 9000 x 6000 pixels @ 300 dpi. So put film in your hands and you can go 54 MP.... I could go higher, but no point
I'm more interested is what other features a pro camera may bring. Until then I'll stay with the the good ol' way.
cheers,