Using Small Apertures

This might be of interest to the scientist types.I'm posting it here 'cause it seems to be diffraction related--(to me),but but move it or can it as you see fit.-


http://www.newscientist.com/article...ses-give-perfect-vision-for-any-eyesight.html

Diffraction is good to understand, but remember that it is just one thing to consider when crafting your pictures. Most good lenses are of sufficient technical quality to be used at any marked aperture while producing prints that would be acceptable to most people. In many cases, depth of field or exposure time is a larger concern than absolute sharpness.