Autofocus not working. (18-55mm lens)

[marcosochoa]

Hello,

The autofocus on my Canon 18-55mm is malfunctioning and I'm afraid it may be broken.

All the internet research I've done points to issues electronic, but I believe this to be mechanical simply because of the noise it makes. With the lens set to AF, it does nothing, but makes a slight whirring sounds as if the camera is trying to, but can't focus the lens. In MF, turning the focus ring makes soft clicking sounds.

The autofocus works fine on the other lens I have.

The lens has not been dropped. I take really, REALY good care of my stuff!  Any other recommendations or bits of advice are much appreciated!

[Human]

This technique did not work for my Quantaray 28-90mm zoom. I twisted, and pulled as hard as I dared, given the lens' totally plastic construction, but never felt a click. I've got two older Canon bodies, a 3Ti and an SXi, and the lens just makes noise on the T3i, while on the SXi, it will try to autofocus once or twice, sometimes even successfully, before giving up and making noise. Fortunately, I've got four other Canon EF mount lenses that work just fine, so I can drop this one in a drawer and not lose any sleep over it. Sometimes you've just got to say it is what it is and move on.

[kvbarkley]

This fix is only for the Canon lens, other lenses may be made differently. If it works on some cameras, but not others, this was not your problem, anyway.

[Human]

With all due respect, this IS my problem. I am experiencing exactly these symptoms, just with a different lens. I am fully aware that the Quantaray lens in question was made by Sigma and not by Canon, but after reading this thread I felt I had nothing to lose by giving it a try, especially as I had already acquired another lens to replace it . I was merely reporting my results, or lack thereof.  No need to be snippy and unwelcoming.

[kvbarkley]

Sorry, I did not catch that the lens did not work on all the bodies you tried, though it does seem to have different symptoms with different bodies.