GH4 OT 4K: iPhone 4K from tiny sensor??

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wwjd

Well-known member
OT here: has anybody asked the question of how APPLE is getting 4K video out of a tiny 1/3" sized sensor? (I don't have one so my inch is a guess) Isn't that kind of crazy?
 
wwjd said:
OT here: has anybody asked the question of how APPLE is getting 4K video out of a tiny 1/3" sized sensor? (I don't have one so my inch is a guess) Isn't that kind of crazy?
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Same way GoPro does, and the same way the HC-X1000 and other comparable camcorders do... with hyper-tiny pixels.
 
gopro seems like 2-3 times the size -maybe jsut a big lens. so if they can do it, then Panny could fit 8k in M43 size maybe?
 
size per photosite makes a massive impact on quality and sensitivity. The more pixels you cram into the same amount of space the more of a negative impact it has on the final image. People already complain that the m43 cameras are not very good in low light. If you cram 8k into a m43 sensor you will basically have the sensitivity of a 2/3" video camera. Not horrible by any means but a big move in the wrong direction for m43. Sure it would be 8k video but it would be a massive sacrifice in terms of low light performance.

The iPhone 4k video is impressive for what it is but have you ever tried it indoors in even moderately low light? It rapidly falls apart into pixel mush.
 
Smartphone sensors have moved way beyond "mere" 4K. I believe the latest Sony designs have 23 MPX, which is almost three times as many as needed for the 4:2:0 UHD (8.3 MPX). They also use various technologies to get the sensitivity up - from the Back Side Illumination to Clear Pixels, etc. Often, due to the sheer size and thus profit potential of the smartphone market, their sensors will actually introduce the new technology before it graduates to the consumer photo-video gear.

Of course, at other times, the technology is first developed for the high end pro or even military uses - I think that was the case with the Dalsa chip - and then slowly is eased into the lower priced products.
 
wwjd said:
OT here: has anybody asked the question of how APPLE is getting 4K video out of a tiny 1/3" sized sensor? (I don't have one so my inch is a guess) Isn't that kind of crazy?
Click to expand...

I've been getting 4K video on my Android phone for almost two years! When I replaced my last LG G Flex with a Samsung S6 edge+, I still had 4K and it will do in a pinch. Problem is, form factor and the quality in anything else but bright sunlight.
 
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