Why do cameras need bigger lens than Smartphones

Started 6 months ago | Discussions thread
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Brisn5757 Senior Member • Posts: 2,946
Why do cameras need bigger lens than Smartphones
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My Smartphone takes sharp photos using f2.2 and only has a very small lens, so I was wondering why cameras need larger lens to take the same photos?

If a Smartphone can focus then it must have a very small motor to move either the lens or the sensor.

I can also take photos with my smartphone in low light condition with very little noise and the photo is bright and clearly enough to see everything  yet cameras have a problem with this. In stead of using a torch I can use the monitor on my Smartphone (in camera mode) to see things in very low light conditions.

Ref:
Samsung Galaxy Notebook 3
31mm f2.2 lens
max ISO 1000

Just curious

Brian

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