Camera sensors cover much more surface than smartphone ones.
Your average smartphone sensor covers about half the surface of a mini-SIM card. The best camera sensors cover half the size of a credit card.
That makes a huge difference in how much light the camera sensor can pick up, and there’s also the fact that camera sensors usually offers a wider ISO range (the sensitivity to light). Bigger sensors cost significantly more to manufacture, but being more complex, they capture more light and more of its details.
When it comes to form factor, your smartphone is a Swiss knife of different devices. It often gives you the “*lite*” experience of those devices.
* Typing on a physical keyboard beats an on-screen keyboard that is smaller than your palm.
* Watching movies on a wide screen beats your pocket size display.
Similarly, taking photos with a smartphone doesn’t give you the same control that a prosumer or professional camera does.
Yes, the smartphone makes up for it by heavily relying on software, and by having different angle lenses. But a camera with interchangeable lenses opens up possibilities that you don’t have with a smartphone.
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