What is equivalence good for?

Started Jul 25, 2014 | Discussions thread
Just another Canon shooter
Just another Canon shooter Veteran Member • Posts: 4,691
Re: What is equivalence good for?

olliess wrote:

Just another Canon shooter wrote:

...the answer is as simple as that: just multiply three numbers (F-stop, FL and ISO) by the crop factor.

I think multiplying the ISO by the crop factor would actually be equivalent to a "screwup," but I don't want to derail this fascinating and original conversation. So please carry on.

It would be a screwup if you don't.

GB does not want to include it because he does not want to be criticized on the basis that different sensors have different noise characteristics. Recent sensors have remarkably close QE, so this is not a more important problem than, saying that different lenses with the same f-stop differ by their t-stops.

 Just another Canon shooter's gear list:Just another Canon shooter's gear list
Canon EOS 5D Mark II Canon EF 15mm f/2.8 Fisheye Canon EF 35mm F1.4L USM Canon EF 50mm f/1.2L USM Canon EF 135mm F2L USM +4 more
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