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Interesting. Looks like a photoshop job of a PhaseOne IQ back.
Sony is so far ahead of the curve that one could hardly call the 50mp sensor "old" tech, even though it's around two years old now. Nothing comes close in terms of low noise and high dynamic range, so if they do make something even better (improved revision ala D810), it would simply stay class-leading even amongst the top sensors.Sony wouldn't even consider using this old sensor now. If, which they won't, came out with a medium format camera it would be a current generation chip...
I'll believe this one (along with a Fuji MF) when I see it. Sony MF rumors have been swirling around at least ever since their 50mp CMOS chip hit the market over two years ago, and Sony was probably playing around with that chip internally long before then. Sony obviously has the tech to build essentially an A7Rii with the 50mp sensor (or even FF 100mp) if they wanted to, and if they've been paying attention to criticism of the X1D, there's definitely a market for a mirrorless MF camera with a focal plane shutter and IBIS (unless for some technical reason A7Rii tech can't be applied to MF). I hope my skepticism is unwarranted and we do see Sony (and Fuji) enter the MF market soon though. If Sony does enter the MF market, I'd expect it to be with a sensor other than the current 50mp 33x44 because I'm not sure there's enough of a difference between the 42mp BSI sensor on the A7Rii and the 50mp 33x44 MF sensor to warrant an entire new product line from Sony...especially given the immense popularity of the A7 series.
But the larger mass could be handled by larger gears?The mass of the IBIS for a MF chip will be too much for the small gears to handle imo.
Interesting. I always assumed it would involve some kind of gyro with various mechanisms moving the sensor. I wonder how the piezo electric system does 5 axis movement.There are no gears in IBIS systems.
Sony uses a piezo-electric system: the sensor "crawls" on a bed of friction cells, a system originally developed by Minolta. Pentax uses coils on the side of the sensor. I am not sure what Olympus uses, but certainly not "gears". I think Olympus also uses a piezo-electric system.
The problem when scaling up these system is mainly power consumption. The necessary forces scale with the mass of the sensor system (sensor + bed), which roughly scales with the surface area. More power means both more battery drain and more heat.
The systems to move a sensor around are available actually: they are used in multishot systems. But power is less of a problem in a multishot system, they are only moved 4 or 16 times and do not need to follow random movements.
They need some gyros/accelerometers as sensors, this is what they use:Interesting. I always assumed it would involve some kind of gyro with various mechanisms moving the sensor. I wonder how the piezo electric system does 5 axis movement.
https://en.wikipedia.org/wiki/Vibrating_structure_gyroscope#MEMS_gyroscopes
http://www.memsjournal.com/2011/01/motion-sensing-in-the-iphone-4-mems-gyroscope.html
http://www.sonyinsider.com/2009/12/17/the-technology-behind-sony-alpha-dslrs-steadyshot-inside/