Mirrorless vs DSLR

[Kayaker72]

Besides cost reasons I guess I always assumed the real long term goal for mirrorless was to get to an electronic shutter. Then as video gets to the point of extremely high frame rates, then you could pull frames (grab frames) at any instant of the action. What if you could produce high res 200 (or more) frames a second and you could pull any one of the frames. Or even high speed video capabilty with super slow-moving mo or each frame can be pulled out for a photo. Aren't we getting close to that senarrio?

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Took this as a chance to look at rolling vs global electronic shutters. Concepts I was generally aware of, but had never really looked into. I found this on Cinema 5D. While my recent math skilz might not be up to standard, I would still interpret the 25 ms to be 1/40th of a second. So, the Canon 5DC has a rolling shutter speed equivalent to 1/40th of a second. The fastest reported by cinema 5d is the Arri Alexa at 6 ms or ~1/160th of a second shutter speed. And these are for 2k-4k video, not 50 MP (so the number of rows that need to be read would be much higher for still photography which would require even longer read times).

So, rolling shutters are still a long ways away from the performance of a mechanical shutter.

Of course, the next option would be a global shutter. Reading up on that a bit:

1. Very expensive
2. Requires a lot more on-sensor circuitry that cuts down on pixel area. Microlenses has helped the light gathering ability but, in addition to cost, noise/circuitry/heat/and just managing all that data at once seem to be issues.

Then, of course, is memory. I already think the 5Ds(R) ISO range was limited for no other reason than bandwidth. But say you design around the 100 MP files that are maximum there (keep the math easy for me ...and designing around a max is usually a good idea). 5 fps is 500 MB/sec, 14 fps is 1,400 MB/sec.....So, say we have a 256 GB card, it could be filled up in ~3 min at 14 fps. 200 fps...256 GB card filled in 13 secs.

I am really not trying to be so negative about mirrorless. It is just one of those topics that I see so many people talking about with a lot of passion and I just look at and think "meh".....makes me feel like I am getting old.


BTW...some links I was reading on electronic shutters...if interested:
http://www.red.com/learn/red-101/global-rolling-shutter
http://caspegroup.com/How%20an%20ele...S%20camera.pdf
http://www.juzaphoto.com/article.php...tronic_shutter
http://dvxuser.com/jason/CMOS-CCD/