Focal length 35mm equivalent, but not F-stop?

Started Jul 24, 2014 | Discussions thread
Pixel Pooper Veteran Member • Posts: 3,223
Re: Focal length 35mm equivalent, but not F-stop?

John Sheehy wrote:

f-numbers are ratios of real focal length divided by physical aperture size, and have nothing to do sensor sizes.

If manufacturers used the "35mm equivalent focal lengths" in the ratio, then they'd also have to scale the ISOs also to make exposure triangles work. Do you want that kind of a mess?

I don't think anyone is talking about changing the way exposure is calculated, just the way specs are advertised.

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