gjman wrote in post #2408827
I have the 28-135 on a 20D and its focal length for
MY INTEDED USE is perfect. Just coz you didn't/could'nt find a use for it does not mean that others won't or can't. The way you framed your response it looks like that the 28-135 is a dud on a APS-C body which its not.
You are totally right. There is not such thing as a perfect lens for everybody. Every person has to think carefully which is his/her best buys. I just wanted to share my experience. The 28-135 is a great lens and the IS is lovable. But Canon made a "28-135" for digitals, and that is the 17-85. Its IS gets you four stops, but the 28-135 gives you only two. In my case I lost many shots because of having a 44mm glass on its widest extreme.
The only point is that you cannot call the 28-135 on a 20D a "walkaround" lens. You are very limited with a 28-135 if you want to do travel photography, architecture photography, environmental portraits, wide landscapes, etc. If you have a look at the lens catalogues for film cameras, you will not find a single 45-200mm lens. I guess photographers would consider absurd to have this type on lens on their cameras. That's what happened to me after two years shooting 17,000 pictures.
Now in the digital era, and with the APS-C sensors you can do as you want. In fact, with a "analog" glass on a APS-C camera you get just the best part of the glass.
But please, again, don't call it a walkaround.