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Silly question by a noob

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Ok I know this is not the best way to present myself in a forum for professionals users. BUT since i got stuck in DSLR film making for about a year now, i want to clear my mind about some strange ideas of mine.
So let's suppose that Mr Canon wants to create a new camera just to record videos at 2k(~ 2 Mp) 24p in raw format. Can he eliminate the mirror parts, reduce the number of pixels, make them bigger filling the 36*24 sensor size? Will he maintain the same shallow DOF, low light capabilities, s/n ratio(about this one I guess not because, from what I know, its about pixels number) and so on?
Thank you in advance, please go easy with insults! ;)

They could do that. Bigger pixel means less noise, DOF would be the same. But, they won't do that for a DSLR. They might put a sensor like this in a dedicated video camera that support changing lens. 


If I would be Mr Canon I would really have a huge discussion internally (and with costly advisors...) how to separate the pure video products from the pure photo dito.

I personnaly don't think they expected so many pros/semipros to start using 5DII for pure video.

Sure the DSLR will still have video capabilities, but I would go for a pure video camera with changable lenses that does not (or even should not) look like a DSLR.

dr croubie:
a) you have 21MP in a FF sensor, and put 9 (or so) of them together into one 'video pixel' across the whole sensor.
b) you just make a 2MP FF sensor.
All things being equal (like using the same technology, gapless microlenses etc), and using the same lens, you get exactly the same DOF, Noise, Sensitivity etc. (maybe a bit less power draw? if so maybe a bit less noise from self-heating?

If you eliminate the mirror, take out the shutter (ie remove stills capability) then it'll be cheaper too. But then you've just made a dslr-shaped video camera...

Smart thing for canon (or anyone) to do in bringing out a dedicated interchangeable-lens video camera is to make it either use their dslr-mount (like EF-mount), or make an adaptor so that you can mount dslr lenses on the new video camera.
And there's only one real interchangeable video lens-mount, Arri PL, and that's got a long enough flange distance that you can mount it on almost any new-mount video camera to come...

There's a few issues... first, as dr crouble mentioned, it would still be the same size sensor and regardless how much pixels it has, costs wont be any cheaper to produce and you wont have the superior resolution of 21mp (for lets say 4k video comes out, etc... It's much easier for Mr Canon (not that he will) but to throw in a patch or firmware to record that size vs recreating the sensor (again). 

Secondly, the bigger pixels, the less noise is sorta a myth... With that thinking, the 10D/20D should have less noise than the 7D, but the 10D got noise past iso 200... (But in it's defense it was actually very close to film tolerances and most photographers using it had a film background so we didn't think anything of it).  Plus, with the smaller pixels you have finer resolution hence you can SEE the noise easier whereas the noise on lower resolution cameras would have to be big enough to take up the majority of said pixel to show, and with those cameras it didn't take much. 

Now with that out of the way, they definitely can put together a barebones no frills super video camera dslr but they would have to make it at a price point (full frame) and cheap enough to produce where it would be profitable and where they are comfortable that it would have enough of a demand to warrant it.  Dont forget struggles including jello cam/rolling shutter, frame rates, buffer and recording limitations, sound options, etc... I couldn't see that kinda camera until they get those dslr quirks sorted out.  If they're going to invest in creating a camera they dont want any of these issues to ruin the camera. 


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