I have had the zooms 28-135 IS, 70-300 DO, 17-40/4, 10-22 and the
kit lens. The 17-40 has the smoothest and lightest zoom, build
quality is better than the others, except for maybe the DO. The DO,
as it is kinda heavy (for its size) had the zoom ring smooth, but
heavy. The 10-22 is very similar to the 17-40, design and all. Zoom
action is pretty much the same too. The 28-135, as you say,
compared to the 17-40 has the zoom harsh and a bit heavier. The kit
lens's build quality is on a par with Lego.
So from that experience (not much, I know) I'd guess that the
17-55's build quality is equal or superior than the 10-22 (and
maybe the 17-40). But peope who have it should be able to advise
you better, since the 17-55 is faster and heavier. I'd think
something more like the 24-105.
I'm missing my right arm just below the elbow. When not using a
camera bracket I hold the camera in the palm of my hand at the base
where it connects with the len. The lens is cradled between my
thumb and index finger.
There are 2 things that make the L lens better for me in this
situation - placement and smoothness of the zoom. The placement
allows me to use my thumb to adjust the zoom and smoothness
compensates for the akwardness of the position.
I suppose the placement may be more important than the smoothness
but if it moves easily I can reach with the nub of my right arm to
zoom in and out.
I'm sure this is hard to picture but this is a fairly critical item
to my enjoyment of photography and is why I seldom use the 28-135
that I own. If I could grasp the zoom ring like everyone else,
this wouldn't particularly matter.
Hope that helps.
Louis
It turns... left and right. Smoother than cheapo lenses, not as
smooth as my 70-200 2.8L IS. Who cares?
I've never turned that 17-55 zoom ring and thought 'aw, what a
piece of garbage lens'.
Guess I'm just more interested in actually shooting a picture than
how much creamy animal fat my lens reminds me of. LOL.
I have a 28-135 that I hate to use because the zoom ring is
"sticky." It does not have the smooth action of my 17-40.
The EF-S 17-55 looks just like the 28-135 although I've not had a
chance to handle one (the local camera store can't seem to keep
them in stock).
Is it reasonable to expect the 17-55 zoom ring to operate the same
as the 28-135?
Thanks!
Louis