"Equivalence" demonstrated: Canon 5D and Panasonic GX1

Started Apr 27, 2013 | Discussions thread
Lee Jay Forum Pro • Posts: 52,481
Re: You say, "An f-stop is an f-stop...

Hen3ry wrote:

The primary effect of focal length is viewing angle and perspective.

Changing focal length doesn't change perspective.  Only changing shooting location does.

Total light on the sensor? In practical terms, what nonsense.

In practical terms, that's what dictates signal-to-noise ratio, so it's only nonsense if you don't care about how much detail and noise is in your images.

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