What is equivalence good for?

Started Jul 25, 2014 | Discussions thread
Great Bustard Forum Pro • Posts: 42,256
Re: what is F-Stop good for?

mostlyboringphotog wrote:

bobn2 wrote:

mostlyboringphotog wrote:

tko wrote:

What is F-stop good for? What is EV good for? What is shutter speed and aperture good for? Heck, just point and shoot, the camera does the rest.

Amazing how many people fight learning the simplest things about their hobby. Either you understand your craft, or you don't One things for sure, the people that argue and deny it tend to submit the fewest photos . . .

Also learn some history of the craft

It's amazing how little many equivalence deniers do know about the history of the craft. I've seen statements like 'we've had ISO for 150 years' and similar.

What exactly are "equivalence deniers" are denying?

Depends on the individual denier. Some deny the DOFs are the same for equivalent apertures. Some deny the same total amount of light falls on the sensor. Most all think that noise comes from the ISO setting, and deny the same total amount of light and sensor efficiency results in the same noise.

I've been called that "equivalence deniers" but I do not deny that same f-stop will give different DoF/Diff/Total Light on a different sensor size. And I do not deny that there are different f-stops on each different sensor size that will give the same DoF/Diff/Total light. Does anyone?

Yes, some do.

I object only that a given lens/cam should not be described as having "equivalent aperture" on a different sensor size and I have been presenting my case as to why I think that.

Indeed. For some reason, you seem to think that photos with different shutter speeds should be called "equivalent".

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