AF fine tune and focus shift for fast lenses

Started Sep 12, 2016 | Discussions thread
Leonard Shepherd
Leonard Shepherd Forum Pro • Posts: 20,890
Re: AF fine tune and focus shift for fast lenses

Marianne Oelund wrote:

They just think everything is brighter with a faster lens, but that's not how it works.

Commenting only on viewfinder brightness and depth of field if you have a 1.8 or 1.4 lens you can compare what happens to viewfinder brightness and dof by using dof preview at various apertures.

As a guide there is no increase viewfinder brightness or narrower dof in the viewfinder, wider than about f2.8 on high end DX, f2.5 on high end FX and f2.2 on the later film bodies.

You can see the narrower dof at f1.4 using liveview.

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Leonard Shepherd
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