f/1.8 on m4/3, ASP-C, FF; are they the same?

Started Nov 1, 2010 | Discussions thread
SLOtographer
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Re: f/1.8 on m4/3, ASP-C, FF; are they the same?
In reply to Peiasdf, Nov 1, 2010

For exposure f values are the same (up to measurement error) across systems. There are those on the boards who confuse exposure, DOF, and IQ/Noise/total light gathered. If it were the case that f values changed with sensor size, then compact cameras would all be f/20 or f/30 and they'd need high ISO to take daylight photos.

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