Bsmooth wrote in post #18573532
I keep seeing this over and over, and its not just Canon. More Mfg just keep piling on more pixels in there sensors instead of giving us fewer better quality pixels.
I think Sony and Fuji may be heading in the right directions along with a few from Nikon (D500 comes to mind).
Canon has a great system of lenses and bodies, but in the end there only as good as the sensors in there cameras, and it seems to me there lagging right now.
Yes the 5DIV is a great camera, and the sensor is very good, but it just hasn't gotten down to there crop sensor cameras.
Any benefit of larger pixels for lower high-ISO noise per unit of sensor area is temporary and has no ultimate value. The fact is, the prototype of the sensor that counts photons and has no added camera noise has 1.1 micron pixels, which would make for a FF sensor of about 715MP. Today's cell phone sensors have less high-ISO read noise per unit of sensor area than older 12MP FF cameras. Someone will come out with a 24, 28, or 30MP DX camera with less noise than the D500; it's inevitable.
I'm hoping for both pixel density and low high-ISO read noise to happen together in my next cameras; not a reduction in pixel density to get a temporary, slightly lower noise. It would have to be a *huge* reduction in high-ISO (pre-gain) read noise to make me swing to lower pixel density, and that would be special-purpose; not general-purpose.
A lot of what you ascribe to pixel quality potential at various sizes probably has more to do with temporary technological issues with bandwidth and video scaling, and budget levels for electronics in cameras depending on the projected sale price. When I examine the black frame read noise of my compact sensor cameras of a few years back, it looks more like array readout slop dominates the noise more, as opposed to pixel-derived noise, compared to my more expensive FF and APS-C cameras.
Any temporary benefit to big pixels at high ISOs is really just a house of cards, ready to fall. Pixels will only be big to reduce file size and bandwidth, in the future.