Hi my Canon EFS 17-85mm lens has had the zoom stuck at the 17mm position now for three or four years, the lens still took photos OK, which was all well and good for wide angle or macro shots. I had enquired quite a while ago about having it fixed by Canon, but the estimated price was a bit high, although not as high as a new lens. So today I went for broke and decided to have a bit of a look inside, so off came the front lens, but nothing was to be seen. Next came off the front part of the zoom tube and the zooming ring, but still nothing to see. So next the lens mount had to come off along with part of the body.
So now I was heading for scary territory, so should I quit now before I mess it up altogether, but no, I just couldn't resist the challenge and made a cup of tea and had a little study of what to do next. The printed circuit board just had to come out of the way, which revelled a few more screws to undo.

Five of these screws released the next piece of plastic, but there was still nothing to see, so I took the back lens off, which was held on by the three black screws with a drop of glue sticking them to the tube that held the lens.

This still didn't show any cause for the jam up, so after a good long study, the last three screws were removed and this released the whole zooming mechanism from the body. I had to handle the mechanism with a bit of caution, as it had a lens in both ends that I did not want to remove.

Finally it was revelled that the screw that can be seen in the photo above, is one of three, which had all came loose, once these were retighten, the zooming mechanism work just as it should. When I was satisfied that all was OK, I cleaned round these three screws and put a spot of hot glue on them and waited for them to cool down and trimmed off the excess glue with a surgical knife and proceeded to reassemble the whole of the lens.
Regards Nick.
Edited By Nicholas Farr on 29/08/2016 20:43:56