Brian Stirling
Diamond Member
1/2.6" vs 1/3.06" sensor and and F2.0 vs F2.2 aperture should be an improvement as well.
A physically larger sensor will help offset the higher resolution and will actually make for larger photosites so it should be less noisy. f/2.0 versus f/2.2 may help a little in low light conditions but in most cases the lens will be stopped down to limit light and provide greater DOF.
The real problem is that diffraction limiting makes these higher resolution sensors pointless given the blurring effect that's unavoidable when shooting at higher f/#'s. My 36MP Nikon D800E DSLR with full frame sensor begins to see diffraction above about f/4 but isn't much to worry about until above f/7 or so. However, with these much smaller cell phone sensors the point where diffraction starts to become a problem is at much lower f/#'s.
The sensor in the Note 4 is more than 10X smaller than my D800E and with a bit less than half the pixels the sensor area per pixel is 4.5X smaller. The linear size is less than half as much so the effects of diffraction are going to show up at much lower f/#'s.
The bottom line here is that we are already well beyond the practical limit for resolution in cell phones and increasing the resolution, in addition to making noise problems worse, doesn't improve actual detail capture because Physics is a bitch and diffraction blurs the image.
Brian