Quote:
Originally Posted by Nikolas
Lens wide open, unless top notch super expensive, will perform much better stopped down.
As a photographer it's a common thing to stop down a lens in order to achieve a sharper image. (also adds depth of field)
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Totally agree, it works much better at F/9 than F/4 but I still don't see how it helps with focus except by increasing the critical focus zone. Doesn't actually effect focus, just makes it easier to achieve by increasing the depot of field.