A question about ISO at m43 Locked

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Yannis1976
Yannis1976 Veteran Member • Posts: 4,939
A question about ISO at m43

Hi,

if under a certain light condition with an f4 lens I get ISO800 (irrelevant of the sensor), do you know how much would the ISO increase at f5.6 and f6.3?

I am asking this to understand if a Sony RX10 IV at f4 needs an ISO800 at a certain light condition how much would a m5 III with f6.3 lens need? Have in mind that Fuji XT3 needed more than ISO1600 for the same exposure (ISO1600 plus increased exposure by 1.3 in LR).

Thanks

 Yannis1976's gear list:Yannis1976's gear list
Olympus TG-5 Canon G5 X II Fujifilm XF 35mm F1.4 R Fujifilm XF 16-80mm F4
Fujifilm X-T3 Sony RX10 IV
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