A few words on Equivalence and comparing systems

Started Apr 2, 2013 | Discussions thread
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olliess Senior Member • Posts: 1,069
Re: A few words on Equivalence and comparing systems

Macx wrote:

If I really had my way, I would use a logarithmic scale for the stops.

That's what the clicky stops are for (or used to be for, in case your chosen system no longer has them). If you take f/1.4 as the baseline aperture (for instance), then the f-stops happen at 1, 2, 3, ..., * (log 1.4).  

So I would say that Av shouldn't be more than 6.

The numerical f/stops, which you can read off the camera, are useful for some other things, e.g., manual flash exposures.

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tko
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