The information is kept pretty secret. Gordon Laing wrote in his review:“The G7 X Mark III's 20MP 1"-type sensor uses a Stacked CMOS design which, up until now, has only been found on Sony cameras.”
Canon PowerShot G7 X III review: the compact camera that lets you broadcast to the world
The PowerShot G7 X Mark III doesn't stray from the formula that made its predecessors well-liked, at least on the outside. Its feature set, however, has been greatly improved, with live YouTube streaming being the highlight.www.dpreview.com
"The sensor is probably the same as Sony’s older RX100 IV which means the G7X III may gain 4k and extra speed but sadly not the phase-detect AF introduced on the later RX100 Mark V which means the autofocus is less confident than the latest Sonys"
Canon PowerShot G7X III review | Cameralabs
www.cameralabs.com
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