Originally posted by normhead Less leeway in the exposure, a little less Dynamic Range, a little less control of noise. You're fitting your scene into a slightly smaller window. With my K-5 I could expose for highlights and still be relatively certain I could rescue any shadow detail. I'm a bit less willing to try that with the K-3.
The K-3 has a little less dynamic range but the difference is marginal (there is a significant difference in published scores but that's because the K-5 offers ISO 80; starting from ISO 100, they are very close to each other).
Regarding noise, the K-3 and the K-5 are practically the same with the main deviation potentially being caused by heavier (non-optional) noise reduction in the K-5.
The
DXOMark scores of the K-3 and K-5 are so close to each other that any differences in the results will be imperceptible.
Of course, you have to compare two prints of the same size, or two images scaled to 2MB, e.g., for web display. The per-pixel performance of the K-3 is worse, but that is completely normal for a 24MP sensor when compared to a 16MP sensor. One must not look at 100% views and then deduce that the higher MP camera has worse performance. Per-pixel performance does not matter unless you are trying to print huge images and actually print a K-3 image larger than a K-5 image. But then you are comparing apples to oranges.
And one must not forget that more MP have their advantages as well:
- better resolution.
- more cropping potential.
- finer-grained noise.