It packs a 20MP sensor behind an ƒ/1.9 lens with OIS.

And unlike the other phones on here, there's a dedicated camera button to make launching faster and easier.

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Sensor size is measured in fractions, to the larger the number (i.e.

the smaller the denominator), the larger the sensor.

Of our four phones, the Nexus 6P has the largest sensor while the i Phone 6s has the smallest, but they're all fairly close to the same size — just 0.1 inches separate the two.

Pixel size is where sensor size and megapixels meet — it's a measure of the actual size of the actual individual light-sensing pixels on the sensor plate.

We're not professional photographers, and we don't expect you to be either. Smaller-resolution photos might look fine on your phone or computer, but once printed at poster size they might fall apart in quality.

But if you want to get technical with your smartphone, there are phones that'll let you do that. Thankfully, the minimum 12MP sensors we're looking at here have enough detail that an 8x12-inch print would look fantastic, and even a full 24x36-inch poster would look pretty good.

Because we're talking about putting millions of pixels on a plate roughly the size of your pinky finger nail, we measure these in micrometers (μm).

The larger the individual pixel, the more light it collect, and thus the better quality and brighter image it should able to produce.

Technically, yes, both the Galaxy S7 and the Lumia 950 offer the option to shoot with manual controls and spit out RAW image files that are better for editing than the JPGs we know and love.

But, the truth is most people who buy these phones aren't going to bother with manual modes — they're daunting and finicky and RAW files take some time to fully wrap your head around.

So let's do this: it's Apple i Phone 6s Plus versus Huawei Nexus 6P versus Microsoft Lumia 950 versus Samsung Galaxy S7 (otherwise known as the challenger and the new kid on the block).