Originally posted by garywakeling is the 75 2.8 really a big step up from the others or just folklore
Well, we have to consider two things here.
The 75mm F4.5 lens is perfect, almost no distrotion, hell of a sharp lens, the only downside is the F4.5
The 75mm F2.8 AL is: smaller somehow, lighter, equally sharp (always consider age and sample variation) and is F2.8
It has a bit distortion though. When you know that the AL is going vor $1000 and more, then you can simply say, contrasted to the existing F4.5 version, this price is not justyfiable. The lens is good, but in the end of the day a lens is only a tool and most jobs can be done with much simpler lenses.
So I can not tell you it is bad, nor can I say it is an automatic legend. It simply is a good lens and there are less around then people looking for them. The rest ist the market