Although they are supposed to be the same optically, if you look closely at the Photodo rating, a big reason why the F scores better is that it tested noticeably sharper wide open. Why, if the optics are the same? Or maybe they aren't?
Joe
"They do mechanically. The inner structure of FA is less prone to focus
shift due to mechanical failure. However, the inner elements of FA also
wrobble a little more and should explain the lower MTF on photodo."
Although they are supposed to be the same optically, if you look closely at the Photodo rating, a big reason why the F scores better is that it tested noticeably sharper wide open. Why, if the optics are the same? Or maybe they aren't?
Although they are supposed to be the same optically, if you look closely at the Photodo rating, a big reason why the F scores better is that it tested noticeably sharper wide open. Why, if the optics are the same? Or maybe they aren't?
