Canon 100-400mm lens focus problem
in [Digital Cameras]
|
Prev: For the LAST TIME...raise your right hand and repeat:
Next: The Canon SX1 IS doesn't have a date stamp! - SOLUTION!
From: Charles on 19 Dec 2009 18:30 "Wally" <Wally(a)luxx.com> wrote in message news:iqfoi5p7vc87905clnjv7m0aacu73edhuk(a)4ax.com... > My Canon 100-400mm lens is 7 days old. This morning while autofocusing > on a bird, it lost focus, started hunting, and then stopped focusing. > The focus was jammed at the minimum focus position. Manual focus > wouldn't work either. > > The zoom was at 400mm, and it was on a 40D camera. > > The situation was remedied by zooming in to less than 350mm. Then it > autofocused again for a moment, but then jammed again in the same > position. Turning the camera on/off makes no difference. > > After about 20 minutes of tinkering with it, the lens resumed normal > operation. But a few hours later it jammed again. > > Anybody else have this problem? Is there a remedy? > > The guy at the store where I bought it said to just keep using it till > it always does it, because it can't be fixed if it is not acting up. > But I think I will return the damn thing and let Canon deal with this > intermittent problem. Do return it as it has dirt in it or is out of spec, mechanically. It is sticking for some reason.
From: SamSez on 20 Dec 2009 18:47
Wally <Wally(a)luxx.com> wrote in news:52vpi59vsp0b1o0d27vdah2j3ph1fd98t0@ 4ax.com: > On Sat, 19 Dec 2009 10:35:57 +0100, "Lucas" <cauwels(a)xs4all.nl> wrote: > >> >>"Wally" <Wally(a)luxx.com> schreef in bericht >>news:iqfoi5p7vc87905clnjv7m0aacu73edhuk(a)4ax.com... >>> My Canon 100-400mm lens is 7 days old. This morning while autofocusing >>> on a bird, it lost focus, started hunting, and then stopped focusing. >>> The focus was jammed at the minimum focus position. Manual focus >>> wouldn't work either. >>> >>> The zoom was at 400mm, and it was on a 40D camera. >>> >>> The situation was remedied by zooming in to less than 350mm. Then it >>> autofocused again for a moment, but then jammed again in the same >>> position. Turning the camera on/off makes no difference. >>> >>> After about 20 minutes of tinkering with it, the lens resumed normal >>> operation. But a few hours later it jammed again. >>> >>> Anybody else have this problem? Is there a remedy? If you bought it from somewhere with a good return policy, I would return it immediately. If you explain that you could not use the full-time manual focus ring -- that it was truly mechanically jammed -- they should have no problem sending you a brand new one -- maybe even cross ship the replacement [with a hold on your credit card]. Sam |