Originally posted by biz-engineer If manufacturers would keep the pace of apsc upgrades of 5 years ago, we would now have apsc camera with 100Mpixels and 50 frames per second.
I've read a couple of papers that claimed APS_c didn't increase resolution after about 50 MP (16 MP in the red spectrum). theoretically. In this case, because of the full size of the receptor sites is less than the size of the actual receptor, it's likely you can't actually get very close to those theoretical limits. APS-c is pretty much optimized for red, yellow and green at 24 MP. Only blue can add resolution beyond that point.
That's a really good reason to go FF 36 MP as opposed to APS-c 28 MP. And also why after 36 MP FF it's good idea to look at 51 MP MF if you need more resolution. I'm sure when Nikon went 42 MP on the D850 they were paying attention to max. resolutions at various spectrums of light and how far they could go while mainitaining a unified composite image with varying degrees of resolution in the different spectrums. It also explains why no one has matched the 51 MP of their FF camera several years later.
The K-3 was delayed 6 months while they worked out the cross talk and other issues with APS-c 24mm, and the accelerator chip is almost certainly the end result of those issues and needing to get them under control, even at 24 MP.
Looking at some of the test shots from the Canon 51 MP, it looks like Canon just plowed ahead ignoring those issues, the same way for years they just ploughed ahead with industry worst dynamic range. They aren't known to be the company most concerned about producing cutting edge image quality. Their focus has been on how you take a picture, not how good it is after you do.