A question about ISO at m43 Locked

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


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).


 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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