Getting the highest performance from a lens

Started Jan 19, 2013 | Discussions thread
jitteringjr Veteran Member • Posts: 3,570
Re: Getting the highest performance from a lens

CameraCarl wrote:

There is a rule of thumb that lenses are sharpest stopped down two stops from wide open. So if you are pursuing sharpness and don't care about depth of field or shutter speed, this is the way to go unless you start moving into ISO speeds where you get worse image degradation from noise than you will ever gain in sharpness.

Remember with slower lenses like 5.6 on today's 18mp crop cameras, they become diffraction limited long before they get to two stops.

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