I though era of "more megapixel = better picture" is gone, but apparently not.
All that matters in technical quality of cameras is dynamic range. That is related to sensor size, more specific to pixel size that has ability to absorb light. It is simple physics.
I would agree with you, but read about what they’re actually doing with this camera.
They’re actually binning the pixels back down to the same resolution as before and only using the extra size to enhance sharpness and dynamic range. You only actually get higher resolution if you shoot raw.
why not just have larger photodiode to increase dynamic range? can't see how using more photodiode would equal more dynamic range or better noise levels? never seen a sony,canon etc get less noisy and better dynamic range as they add more mega pixels..
The iPhone is using a quad-bayer filter. Most of the time, it is behaving as a 12MP camera with error correcting photodiodes.
Compared to a normal 12MP camera, the 48MP one will collect slightly less light due to there being more gaps, but the bet is that the increased noise from that is less than the noise reduction from the pixel-binning.
Every photodiode has three others around it with the same colour. If they’re all similar, the sensor will average them, and if one of them is way off, it’ll throw that one away and average the rest.
This is better than doing noise reduction on either a 12MP, or a standard 48MP sensor because the space between comparable diodes is reduced, making it less likely to falsely treat small things like stars as noise.
As a bonus, if the user zooms in on a really sunny day, the 48MP might actually be worth using directly.
But your eyeballs are still better than cameras, or at least what we see is better than an image taken of the same thing. Maybe it makes sense that we have not hit the absolute limits. Although these cameras are smaller than you eyeballs. Might not make sense to compare digital cameras to eyeballs yet.
All that matters in technical quality of cameras is dynamic range. That is related to sensor size, more specific to pixel size that has ability to absorb light. It is simple physics.
Those who need camera sensor quality should check this charts: https://www.photonstophotos.net/Charts/PDR.htm