Bit of a semantic (and potentially naive) question here really, but I'm writing an article and want to be sure I'm correct.
Can everything that limits the MTF of a lens except the diffraction limit be classified as an abberation? I've found this nice list of aberrations from this question, is the contents of this list (practically) everything that differentiates the crisp image from a very high quality lens from the blurry image of a low-quality one? All other factors such as aperture, focus etc. remaining the same.
Or are there other factors for poor quality lenses not in that list that contribute to the difference, or to a loss of MTF? I don't know for example if the grind/finish quality of the optical elements contributes, or if it's already accounted for with some of the aberrations in the list.