Optical engineering is something that we take for granted these days, with almost every smartphone packing its very own camera for our convenience. But if you take a look at the delicate structure inside a mobile camera module, you may appreciate the technology more every time you snap a shot. Like this cut-out diagram of the Nokia Lumia 1020's camera, for instance: you can see how the six lens elements and other tiny parts are tightly packed together above the 41-megapixel sensor. The elements are actually a combination of five plastic lenses plus one glass lens, with the reason being a taller module would've been made if all the lenses were made of glass.
And to enable optical image stabilization, ball bearings are used to counteract hand movement -- there's one near the bottom right corner of the above image. Luckily, the module is also designed to withstand normal drops, so neither the bearings nor lenses would fall out of place unless you try really hard. One more shot after the break to compare sensor sizes.
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