[xster]

Ummm that's a really good point. Though numerically, the numbers are probably debatable.

Taking for instance a full-frame Canon 5D II and something like a Huawei P30 Pro on the back of a napkin. A full-frame sensor is 864mm2 and a 1/1.7in sensor is 43mm2. Huawei with a RYYB sensor has an ISO of 409,600 vs 6,400. The phone aperture is /1.6. Realistically, /1.6 glass would be too heavy, so let's call it /2.8.

The ratio would then be 20 (sensor size) * 0.0156 (ISO) * 0.57 (aperture) = 0.178x before AI kicks in for, say, another 75x more exposure time ~= 421x more usable light on the phone.

Based on super unscientific anecdotal experience between the 2 (since the human eye is logarithmic), it seems about right.