Equivalence: exact vs practical

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sportyaccordy Forum Pro • Posts: 12,686
Equivalence: exact vs practical

*dons flame suit*

I think by now we all understand the concept of equivalence. If you don't.... God has blessed you. Be thankful

Anyway for the unfortunate souls who know, we all understand how to create the *exact* same photograph on various formats. But how much does that matter?

Say you are taking a photo of a landscape in bright daylight... fast shutter speeds and still-ish subjects, wide angle lens, deep DOF. For all intents and purposes, if you stop down past ~F/4 or so, the DOF is infinite. All that really changes is the hyperfocal distance. For all practical purposes, has the picture changed?

Similarly, in low light with high ISOs, noise is going to muddy up any distinctions on what is or isn't in critical focus. So again, at the same F-stop, practically speaking, what's the difference?

I just think in many cases the claimed depth of field tradeoff for larger formats is overblown.

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Sometimes I take pictures with my gear- https://www.flickr.com/photos/41601371@N00/

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