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That's at a 16:9 video ratio though. There are no phone camera sensors out there with a 16:9 ratio. That would be useless for taking still photographs. Most DS
by jychang 5y ago
That's at a 16:9 video ratio though. There are no phone camera sensors out there with a 16:9 ratio. That would be useless for taking still photographs.
Most DSLR/mirrorless cameras have a 3:2 ratio, whereas smartphone cameras tend to have a 4:3 ratio.
If you want to make a smartphone camera sensor that can do 3840 pixels across that can shoot 4k, the 4:3 sensor would need to be 2880 pixels tall. So 3840*2880 = 11.1MP would be the bare minimum size for a smartphone camera that can shoot 4K.
In practice you'd want something larger than that, so you can do DCI 4K (which is a bit higher resolution) and do things like gyroscopically assisted electronic image stabilization (which benefits from a few extra pixels around the border). The iPhone can probably implement video stabilization that rivals GoPro's HyperSmooth stabilization.