Hi All,
My 12-35 lens does have the click click noise when zooming in stills mode. If you look at the front of the lens and zoom, you can actually see a ring closing as you zoom and this is what i suspect is making the noise.
It doesn't make this noise if in active movie mode and zooming.
Cheers. At least we know it seems quite normal.
Although there seems to be a range on the loudness of the sound or the hearing of our members.
Some felt it is quite faint, some think it quite audible..