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#1
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Canon 100-400mm lens focus problem
"Wally" schreef in bericht ... 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. Wally Did you try setting the AF-select switch to 6,5m and beyond? |
#2
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Canon 100-400mm lens focus problem
On Sat, 19 Dec 2009 10:35:57 +0100, "Lucas" wrote:
"Wally" schreef in bericht .. . 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. Wally Did you try setting the AF-select switch to 6,5m and beyond? No, because the subjects were usually closer than 6.5m. Wally |
#3
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Canon 100-400mm lens focus problem
"Wally" wrote in message ... On Sat, 19 Dec 2009 10:35:57 +0100, "Lucas" wrote: "Wally" schreef in bericht . .. 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. Wally Did you try setting the AF-select switch to 6,5m and beyond? No, because the subjects were usually closer than 6.5m. Wally, I think the minimum distance to focus with that lens is 6m Marcel |
#4
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Canon 100-400mm lens focus problem
On Sat, 19 Dec 2009 13:17:25 -0500, "celcius"
wrote: Wally, I think the minimum distance to focus with that lens is 6m Marcel Now why would you think a thing like that? It's 1.8m. Wally |
#5
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Canon 100-400mm lens focus problem
"Wally" wrote in message ... On Sat, 19 Dec 2009 13:17:25 -0500, "celcius" wrote: Wally, I think the minimum distance to focus with that lens is 6m Marcel Now why would you think a thing like that? It's 1.8m. Wally, Sorry, Wally I must have been elsewhere ;-( I tried my lens today and it works fine. However, A few weeks ago, I was out taking photos and the same thing happened to me. I was trying to take a shot at 200m or so, and I couldn't focus. I shut the camera off (5D Mark II) and it was working again. Take care, Marcel |
#6
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Canon 100-400mm lens focus problem
Wally wrote in news:52vpi59vsp0b1o0d27vdah2j3ph1fd98t0@
4ax.com: On Sat, 19 Dec 2009 10:35:57 +0100, "Lucas" wrote: "Wally" schreef in bericht . .. 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 |
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