In article <32f94f94.15415586@news.one.net>, scarleton@cintech-cti.com says...

>food for thought: if you are hand holding and shooting a portrait with a
>80-200/f2.8 (set at 100mm) at 1/125 @ f/2.8 or a 105/f2.5 at 1/125 @ f/2.8, I
>am willing to bet that the 105 will deliever a sharper image then the zoom. >Not because of quality of the glass, but the size of the lens. The 105/f2.5 >is much lighter then the zoom and will be much easier to hand hold at slower >shutter speeds. This might apply to you, but I find myself shooting without >enough light very often and this is a very important factor to me...

Hmmm, I find the reverse...
The mass and lenght of the big f2.8 zoom slow my "jiggles", and I get
sharper photos at given (too) slowish speeds with it compared with
lighter/smaller lenses (though they are FAR more pleasant to use!).
'Course, that depends on how long I've been holding the lens up,
ready to shoot...;-)
Hope This Helps