just got my new 24-120mm vr. It seems to have "vari-focal" problem, that is, when you focus @24mm and then zoom to 120mm, it's out of focus! Is that considered a defect?
#1. "RE: 24-120mm VR vari-focal" | In response to Reply # 0Len Shepherd Nikonian since 09th Mar 2003Thu 13-Nov-03 06:51 AM
>just got my new 24-120mm VR. It seems to have "vari-focal"
>problem, that is, when you focus @24mm and then zoom to
>120mm, it's out of focus! Is that considered a defect?
Congratulations - you are the first person on any site I subscribe to to notice!
Yes it is slightly varifocal between the zoom extremes, but then so are most of the 80-200's and the 70-200 VR.
Going back in time, Olympus is the only manufacturer I have seen claim one of their zooms (the 85-250) held its focus precisely throughout its entire zoom range.
Olympus listed zoom settings where focus was precisely held for some of their other lenses.
Some focus variations at some zoom settings is common with most zooms.
The degree of varifocal is greater on the 24-120 than on any other of the 9 Nikon zooms I have used, but still way below that on say a 24-135 zoom.
Varifocal is only an issue if you zoom during exposure wide open, or use manual focus.
Photography is a bit like archery. A technically better camera, lens or arrow may not hit the target as often as it could if the photographer or archer does not practice enough.