I have the Canon 18-55mm lens. When I zoom out from 55mm to 18mm, the lens works fine until 22mm, where it seems to be stuck and you must then use a bit more force. I saw in many sites that this is common for the 18-55 lens. Has anyone had the same problem, and can it be avoided or resolved in any way?
Ok, I verified this on my own version of that lens from my old xTi. That's normal behavior. The lens goes between macro and standard zoom. If you notice, when you put the lens at 55 it is a long way out, then as you move to 24, it slowly pulls back up against the body of the lens. Then from 24 to 18, it pushes back out again. Thing is, it does this a) over a much shorter distance and b) with a different set of lens elements to shift to the macro side of the lens.
You are moving more material further with less rotation, so it is harder to move. Don't worry about it unless it gets hard enough that you feel like you are going to do damage.