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Old Oct 22, 2008, 10:52 AM   #1
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http://www.lensrentals.com/news/2008...the-sigma-saga

To be fair my (now gone) 70-200 2.8 (non dg, non macro) and 120-300 2.8 (again non-dg) never had problems. But I have seen threads from reliable sports and wildlife shooters indicating QC problems.
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Old Oct 22, 2008, 1:34 PM   #2
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This doesn't just affect Canon and Nikon users.

This should be in the General Q&Aforum.
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Old Oct 22, 2008, 1:36 PM   #3
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I put it in Canon, Nikon and Pentax lens forums - they're the most likely users of the lenses. Figured it was best to target an audience doing lens research.
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Old Oct 22, 2008, 7:21 PM   #4
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The same thread has also been posted here:

http://www.nikoncafe.com/vforums/sho...d.php?t=194348

This person seems a little down on Sigma.

I have owned one Sigma lens (100-300mm f/4) amd a Sigma 1.4x TC for about six months now and, so far, no complaints. They both work perfectly.
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Old Oct 22, 2008, 10:13 PM   #5
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FrankD wrote:
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I have owned one Sigma lens (100-300mm f/4) amd a Sigma 1.4x TC for about six months now and, so far, no complaints. They both work perfectly.
The 100-300 f/4 is also an EX series - My 50-500 EX has seen more abuse than most, rolling through the mud, getting wet from my kayak splash and it is surviving quite well thank you

-> The Sigma warranty on the EX glass is also quite a bit longer (4x times) than comparable Canon Pro lenses
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Old Oct 23, 2008, 7:17 AM   #6
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NHL wrote:
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The 100-300 f/4 is also an EX series - My 50-500 EX has seen more abuse than most, rolling through the mud, getting wet from my kayak splash and it is surviving quite well thank you

-> The Sigma warranty on the EX glass is also quite a bit longer (4x times) than comparable Canon Pro lenses
I don't recall if mud wrestling with your Bigma is covered by the warranty! :-)
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Old Oct 23, 2008, 3:25 PM   #7
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FrankD wrote:
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I don't recall if mud wrestling with your Bigma is covered by the warranty! :-)
I got this down to a science actually

The trick is not to worry about spreading the mud when it is still wet (and you'll get it on the camera too with your messy hands) plus you have to take pictures under thoses conditions anyway - I just wait till it dried up at home and then everything just brush off, and with a bit of Windex, it looks just like new :lol:

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Old Oct 23, 2008, 4:52 PM   #8
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I have owned two Sigma lenses a manual focus 35-80mm that came apart in my hands 3 month after I bought it. And an AF 28-200mm that doesn't seem to be very sharp. Maybe I just got a hold of a couple of lemons, but I don't think I'll buy another Sigma. I've had much better luck with Tokina

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Old Oct 23, 2008, 9:24 PM   #9
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A later post contans more detail.

See http://www.lensrentals.com/news/2008...repair-data-10
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Old Oct 27, 2008, 1:54 AM   #10
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Because of its unique position in the market place I tried a 120/300 and found that the back focus issues made it a non starter. I tried a second one to be sure and had the same issues. Googling found that this is a well known problem with the lens and that you are lucky to get a good copy. Keenly priced though it is, it is money wasted if it doesn't work so I bought the 200/400 to supplement the 70/200. A dear alternative but I've never had a problem with a Nikon lens in over 25 years. A friend came motor racing with his brand new 150/500 Sigma and the autofocus lasted a whole two hours before breaking. I remain deeply suspicious of all Sigma quality control and wouldn't recommend them to anybody.
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