RichA
New member
I figure someone must have one somewhere? You grind a lens, keep aberrations under control. Coma, astigmatism, spherical aberration and to a lesser extent, distortion and aperture shape must all play a part in the representation of out of focus areas. But has anyone linked specific corrections to what we see? Broadly, what produces the best bokeh, a highly corrected lens, or a poorly correct one?