I'd like to know from anyone who has experience with both of these fine FD zooms which one delivers better image quality. I have used my 35-105 fairly extensively, and have always been happy with its versatility and resolution, but even though I also have a 28-85, I haven't used it enough to determine how its IQ compares with that of the 35-105. I know that the 28-85 is one of the last FD lenses that was made, and, while it's build quality is inferior to that of the other zoom, it has an stellar optical reputation. I would like to sell one of these lenses, keeping the one with better IQ. Obviously, their range is different, so I'm only interested in hearing about their comparative IQ.