Hi,8k only requires ~35 megapixels. For example check out a Red Weapon Helium 8k Cinema Canera which was used to shoot Guardians of the Galaxy 2. It has about 35.4 megapixels or so.
Not really. It's very easy to calculate. You have to take into account the differnet aspecct ratio.
It goes like this:
So the minimal resultion to have true 8K horizontaly is 8192pixiels. The aspect ratio of a video of this kind is 256/135, so the vertical resolution will be 135*8192/256 = 4320. The need resolution is 35.3 mega pixels. BUT that is with that aspect ratio. It's a camera and the proper aspect ratio is
3/2. (you can divide 36/24 and you will get the same number). The proper calculation is thus :
8192*2/3 ~=5461 then you multiply and get 5461* 8192 =44.736 mega pixels.
Of course you can do 7680 and get a lower number, but it's still above 35mpixels (about 39.3).
I understand that this is a photographic forum, so don't feel bad about the math erros
I hope this help you understand.
Best regards,