Shocking insight: AF is not a closed feedback loop!

Started Jul 18, 2003 | Discussions thread
DavidP Forum Pro • Posts: 29,088
does anybody concur?

I'll have to admit I didn't quite follow your "why f/1.4 is worse than f/4 max aperture" when it comes to AF accuracy.

Did anybody else (Jason?) follow and agree with what he said in that other thread?

I certainly feel like I can MANUALLY focus better with a f/1.4 lens stopped down to f/4 than just using an f/4 lens wide-open.

Mishkin2 wrote:

It's a typical recommendation coming from pros to use fast primes
and shoot available light without flash. Available light forces one
to open up the lens and misfocusing (within the spec!) can bring a
lot of disappointment to newbies who heard about primes being
incredibly sharp.

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