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What is a "diffraction limit"?
I've seen the term used, but what is a "diffraction limit", when should I worry about it, and what undesirable effects are a result of it ?
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Is it better to shoot at diffraction limited aperture or sharpest lens aperture?
In the old cameras like Nikon D80 with 10 Megapixel pixel count. The diffraction limited aperture is F/13 but its known that lenses are generally sharpest at the F/8 so it's a no brainer to shoot at F/...
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