A few words on Equivalence and comparing systems

Started Apr 2, 2013 | Discussions thread
olliess Senior Member • Posts: 1,349
Re: A few words on Equivalence and comparing systems

texinwien wrote:

olliess wrote:

"Didn't want that light anyway."

It's the sensor not the lens, and JACS is talking about measures of lens performance w/r/t equivalence.

Since the "equivalent" lenses for different sensor sizes are being defined to be different focal lengths, the entrance pupils will necessarily be different sizes to produce the same f-number. So, the extra light collected ends up being baked into the lens specification.

But I'd wager you knew this and were just trying to be witty. Unfortunately, you just ended up sounding obtuse.

Hmm. Okay.

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