Light gathering in M43 vs FF

Started 6 months ago | Discussions thread
Peng Bian
Forum MemberPosts: 82
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Re: Light gathering in M43 vs FF
In reply to s_grins, 6 months ago

s_grins wrote:

What is your understanding of light gathering?

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I’m surprised how much Wikipedia contributes to the forum.
http://g1.img-dpreview.com/20AE148C45244CBE9FB1585EDA32B1C1.jpg

Not sure how to put it, I guess luminosity? Basically, with the two setups, assume one is exposed correctly to get a nicely lit image, the other will have the same.

Promit wrote:

The amount of light gathered is 4X on the FF sensor in this case, which will lead to a two stop idealized improvement (the ISO 200 on FF will look like an ISO 50 m4/3 shot, all else equal). The exposure will be the same for both cameras.

This is exactly what I wanted to get clarity on, but I think if you mean light gathered is 4X, then you should mean ISO 50 on FF and ISO 200 on M43?

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