"Equivalence" demonstrated: Canon 5D and Panasonic GX1

Started Apr 27, 2013 | Discussions thread
KenBalbari
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Re: not too "bright"
In reply to tko, Apr 28, 2013

tko wrote:

Equivalence isn't about exposure. Everyone knows any sensor with the same exposure values has the same BRIGHTNESS. That is the purpose of exposure - to give the same brightness for any camera. The sole reason for it's existence.

Only if the sensitivity of the films or sensors are the same, if you want to be technical.

Of course, in photographic slang, it has become acceptable to include ISO as part of "exposure" (as in the "exposure triangle") in which case it does refer to image brightness.  In that case though, Great Bustard's version of full equivalence then does also produce equal exposure.

It's only when using the technically correct version of "exposure" that he has to say exposure is different.  But image brightness is the same; there is no "visable" difference in exposure if you boost the ISO until image brightness is the same when total light is the same.

[And I know you understood this, but I got the impression some may have been confused by it.]

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