Diffraction error

Started Jul 27, 2012 | Discussions thread
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fireplace33
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Diffraction error
Jul 27, 2012

Hi
Can someone explain diffraction error in a nutshell?

I know it is supposed to start to become obvious at smaller aperture settings , let’s say a higher number than F16.

What exactly is it that you see? Does the image just become slightly softer or is it a different type of artifact that becomes visible?

Does it depend on pixel density ?

If yes, would that mean that 2 different DX cameras, one with say 12M pixels and one with 24M pixels, that the error would start at different F numbers, for the same lens?

Does diffraction error also depend on the focal length in any way?

Is it also a design influenced “feature” where the lens designer can make it more or less ,at the cost of other features?

Many Thanks

 fireplace33's gear list:fireplace33's gear list
Canon PowerShot G15 Nikon D90 Nikon D7100 Nikon AF-S DX Nikkor 35mm f/1.8G Nikon AF-S DX Nikkor 18-200mm f/3.5-5.6G ED VR II +10 more
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