#11 (permalink)  
Old 02-10-2012, 12:17 PM
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Join Date: Jan 2012
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Originally Posted by Chri5tran View Post
I've read that this lens is a hit or miss kinda thing. Some people have no problems while others do run into issues.

I was wondering where you bought your lens from and how long ago?

Hopefully my lens, which is being shipped, doesn't have this issue. =/
Yes Christian, it seems there's some kind of lottery going on with this lens

Well I bought it few weeks ago but I'm in Croatia (in South Europe).

But it does seem that this particular problem is global.
Well I recommend you test the lens immediately, it's very easy, as someone said in this thread, in good light, on a tripod, autofocus on some contrasty surface, text is the best from my experience, and then turn off auto-focus and try to manually 'sharpen' it. if you can get better results, autofocus is not working as it should. Then you send it back for calibration or a new lens.
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  #12 (permalink)  
Old 02-10-2012, 12:23 PM
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Join Date: Jan 2012
Posts: 5
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Originally Posted by autofocus View Post
Looks like manual focus has proven to yield somewhat better results. It could indicate a bad copy of the lens that possibly could have been fixed with the micro adjustment option...unfortunately, your camera model does not have that feature
Yes, but I'm gonna take it to the repair shop with my waranty, and let them try to repair it. If they fail I'm gonna have to ask them new lenses until I get the one that works.

I don't want to pay $700 (price in my country) for a piece of gear that doesn't work 70% of the time, as the poster below you noted.

Do you think I should send these images to Sigma directly to ask them for opinion?

Thank you all, again, for assistance.
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