I always thought that PF was due to the inability of the lens to properly focus all of the light spectrum at an equal point and as such you get PF ... and as seen in these images, usually has an accompanying green oof fringe as well (see building) ... or sometimes Blue/Yellow is the culprit.
Isn\'t that why $$$ for APO glass. As such, I can\'t see how a filter could possibly correct for this. Maybe (guessing wildly) digital amplifies it a bit because of the Bayer sensor structure, whereas film grain was more \'random\' and could probably hide it a bit more.
May 29, 2011 at 03:38 PM
Previous versions of RustyBug's message #9629715 « Filters cutting down Purple Fringe CA? »
