Today (6pm Los Angeles time) Sony will announce the new Cine Alta FF camera (early specs here). I am yet not sure if there will be something else.
If reliable rumors is what you are looking for please stop reading here 🙂
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Today I got this completely unverified rumor. I post it as usual in the hope to get some feedback on this. The new source said A7sIII (or A9s) will come soon:
The interesting thing will be that is will house the worlds first full frame RGBW backlit stacked sensor. Giving us around 68% better low light performance over the original a7s sensors. It will also be capable of 4K 4:2:2 10bit color and 4K 60p but only at 8bit 4:2:0 full sensor readout. These are the things I am mostly sure of.
But like I said, it might be completely BS 🙂