More megapixels don't help if the rest of the camera system aren't up to it. However more pixels can be extremely useful if you maintain image quality. Note that this implies that pixels don't directly impact image quality, however in the long run you are far better off having the extra pixels to work with.
[...]the ability of a camera to resolve detail is very important. This is as much an issue of optics as it is sensor technology. However the more quality information you have to work with the better your pictures and the greater your flexibility with post processing.
I never said more megapixels can't ever be beneficial - sure they can, and and I welcome them if the rest of the camera is up to snuff... but really, how many manufacturers make optics and processing that actually keep pace with their sensor resolution? Most don't. Apple has been pretty good about this, but as I said before, don't take ANYTHING for granted.
Larger cameras and there for larger optics do not assure you of higher quality. The fact of the matter is the larger the optics the harder it is to control aberrations and other issues that impact rendered images.
Bigger sensors can capture more light but that is only part of the equation. You still need a lens system that can resolve properly to take advantage of the sensors resolution.
The lack of depth of field is a problem at the extreme short focal lengths of common digital cameras.
Of course size is not an assurance of quality, and you need a whole system that can resolve an image in its entirety - that's a given. There are plenty of crappy big cameras out there as well as small ones. ...but a good larger format camera is far better than a good smaler format one. There's a reason pro photographers use full-size CCDs and CMOS sensors instead of micro four thirds.
Also, the larger the optics, the EASIER it is to control aberrations - a speck of dust on a medium format lens vs a speck of dusk on your iphone lens. Which camera has more of its image-acquiring apparatus covered by the same sized speck?
Baloney, some of the best eyes out there are on birds.
Glad you brought that up. Here's a picture of an Osprey skull.
Here's a picture of a horse skull.
Horses are so much larger that their eyes are about the size of an osprey's head, but look how much of an osprey's head is taken up by its eye orbits - they're about as big as they can be on that little head. Clearly, size matters. If you doubt that, especially for low-light,
ask an owl.
What is notable is that Apple has been able to avoid that marketing nonsense as they have dramatically improved the iPhones camera. Pixel count is a factor in those improvements, Apple just puts equal weight on other factors when integrating a camera. Call it balanced engineering if you will. As long as they continue to improve over all performance increasing pixels counts is a win.
Actually manufactures are continual linty improving what a small sensor can do. You angst is mis placed as Apple has improved the camera with every iPhone release, and likely will continue to do so. Also contrary to your statement Apple is directly selling the image quality of the iPhone as it has been highlighted many times in marketing materials.
In any event there is lots of upside potential in cell phone camera sensor technology. Very soon we should be seeing sensors built around quantipum dot technologies or other advancements that could easily double low light performance. Other technologies are also being developed to improve cell phone cameras. I suspect that your bigger is better bias isn't based on sound evaluation of the current state of the hardware nor where tech is going.
Think about this, if bigger was indeed better then how is that Apple has improved the camera in every iPhone release?
Sure, Apple has been pretty good about improving camera quality - but I'm not so sure the 4S is a better camera than the 4, in spite of a better lens and more megapixels. Also note that the iPhone's camera has remained about the same size. We should also know that Apple isn't afraid to take a different direction with things. I hope that they will use technology like this as motivation to improve the entire camera - but we really have no idea if they actually will.
My "bigger is better" philosophy with cameras comes from physics, and years of photographic experience and education.
