Sensor sizes and f stops

Started 9 months ago | Discussions thread
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starlight110
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Sensor sizes and f stops
9 months ago

Hi, I know that in digital cameras, the bigger the sensor size the less noise and thus better light sensitivity, but I wonder if there´s a way to directly correlate sensor size and fstop, like doubling the sensor size from 1/1,8 to 1/3,6 would correlate to one fstop. I have an old low end A630 camera which has a 1/1,8 sensor size and performs average in low light, I want to buy a new more expensive camera but nowadays they make them all with 1/2,3 sensors and it would be weird to spend more money to buy a camera which performs (only from the sensor size factor) worse in low light. Would 1/1,8 to 1/2,3 size woiuld be much difference?

Thanks for the answers

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