Camera specs: what is it that really matters?
The iPhone 6 features an 8-megapixel main camera. That's less than the 13-megapixel shooter on the LG G3, less than the 16-megapixel cameras on the Samsung Galaxy S5 and Galaxy Note 4, and it's much less than the 20-megapixel cameras on Sony's Xperia Z3 and earlier flagships. Does this make the iPhone 6 an inferior camera? Some may shout out a confident 'yes' - in the general case, having less megapixels translates into less fine detail into images, but detail is just one aspect of an image, and arguably, one of the less important ones (unless we're speaking about landscape images that professional photographers capture and use for gigantic prints). If you want a proof, just look at our camera comparisons and polls where the 20-megapixel Xperia Z3 consistently loses to cameras with much less megapixels.
It's important to understand that Apple is not just saving money by not including a camera with a higher megapixel count, but - just like with its decision to use a dual-core chip rather than fall for the octa-core trend - the 8-megapixel resolution of the iSight camera is a conscious and rational decision. Camera theory is a complicated matter, but one generally accepted rule is that pixel size does matter in many occasions. Apple makes a point that its camera features 'large 1.5-micron pixels', and that's an important distinction from all the rest smartphone makers that use much smaller, 1.1-micron pixels (save for HTC at the moment). There are some physical limitations related to pixel size, and most importantly when a camera packs a lot of pixels on a small sensor it becomes very susceptible to the negative effects of diffraction. We have also seen cameras with high megapixel count generally perform less than ideal in low-light.
The takeaway from all this is not that 8 megapixels of resolution is the end-all be-all of smartphone cameras, but that looking at resolution tells you very little about the actual quality of the images that has much more to do with the way the camera exposes, captures colors, the easy of use so that a skilled photographer can frame and shoot quickly, and not miss the magic of the moment that great photos are all about.
It's important to understand that Apple is not just saving money by not including a camera with a higher megapixel count, but - just like with its decision to use a dual-core chip rather than fall for the octa-core trend - the 8-megapixel resolution of the iSight camera is a conscious and rational decision. Camera theory is a complicated matter, but one generally accepted rule is that pixel size does matter in many occasions. Apple makes a point that its camera features 'large 1.5-micron pixels', and that's an important distinction from all the rest smartphone makers that use much smaller, 1.1-micron pixels (save for HTC at the moment). There are some physical limitations related to pixel size, and most importantly when a camera packs a lot of pixels on a small sensor it becomes very susceptible to the negative effects of diffraction. We have also seen cameras with high megapixel count generally perform less than ideal in low-light.
The takeaway from all this is not that 8 megapixels of resolution is the end-all be-all of smartphone cameras, but that looking at resolution tells you very little about the actual quality of the images that has much more to do with the way the camera exposes, captures colors, the easy of use so that a skilled photographer can frame and shoot quickly, and not miss the magic of the moment that great photos are all about.
