The upcoming Sony Alpha a7S III is rumored to be announced in Spring of 2017 next year. According to latest rumors, Sony Alpha a7S III will have an RGBW sensor. RGBW sensor means much brightness and less noise than current RGB sensor on a7S II.
The RGBW sensor, it will add to both sensitivity and brightness. Essentially what they’re doing is including a hard luminance-detecting element. This is good, much more accurate than taking the average from the RGB elements, and should in fact make low-light photography significantly better.
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