How to fix Nikon lens

How to fix Nikon lens

Low Chroma I read a test that found higher than normal amounts of CA in this 18 55mm nikon lens at some apertures, but I don't see it. My standard test is to shoot bare tree limbs on bright sunny days & look for purple fringing, especially at the edges.

I'm not seeing anywhere near the level of fringing shown in some of their test shots.If anything, I'd call it "low" I read elsewhere that one of Nikon lens goals in adding the aspherical element to this lens was to reduce CA, so I'm thinking maybe the lens tested in photozon.de was just a bad apple.
Image Shake control works. I can't attest to how often it provides a full 4 stops worth of shake reduction, but I can see a very clear result when using it.

Fast accurate focusing. One of the reasons I purchased this lens was because I was dissatisfied with the performance of my (more expensive) Sigma 17-35 EX (the newer model), which while sharp, is just too slow and inaccurate a focuser for close work in action sports. The new Nikon lens solved that problem.
Compact, light weight & unobtrusive. Not much bigger than a normal lens.

Barrel Distortion at 18 55mm nikon lens While not exsessive for an inexpensive lens, this is one area where you will see benefit from spending hundreds of dollars for a much more expensive Nikon lens or buying a fixed focal length lens. In most real world situations, it wasn't all that noticeable.

I could usually correct for it in Photo shop, but this is not a lens for critical architectural work etc. I have taken hundreds of photos with this lens and barrel distortion has only called attention to itself a few times. I suspect this is one price paid for the very compact design.

Not very fast. Another area where an "L" has an edge. At F3.5 28mm equivalent and F5.6 85mm this lens is relatively slow compared to a pro lens. This effects stopping the action in low light. OH, you will have to spend hundreds more to get a usable top speed of F 2.8 and that is only one stop faster at 28mm equiv. I think both this 18 55mm nikon lens sharpness and the IS system mitigate this.

It took me a while to learn that I could shoot wide open at all focal lengths without having the outer third of the image turn to mush.That's pretty amazing for a zoom at this price. You don't have a stop or two you almost never use because it is too soft. And the IS system works well in low light, though that doesn't figure in in stopping the action.