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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 11 Feb 2012 (Saturday) 10:00
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New Sigma 17-50 OS HSM question

 
DKStrat
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Feb 11, 2012 10:00 |  #1

Got my Sigma in the mail yesterday. So far I really impressed with this lense. Coming from using a tamron 28-75, I think that the sigma is a better lense for crop camera. However, I have noticed a kindof grinding noise with the autofocus when its trying to lock focus. Is this normal? It seems pretty dang sharp on the long end at 2.8 but I've noticed that its pretty soft on the wide end at 2.8. So far I like like it. I think I'm gona miss the extra reach of the 28-75 but I purchased an canon 85mm 1.8 for the long end.

Keith


Canon 60d, Sigma 17-50 OS HSM, Canon 85mm 1.8, 2 430exii's, 420ex, ST-E2, lightstands, umbrellas and other misc stuff.... man this is an expensive hobby!

  
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silvrg35
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Feb 11, 2012 11:54 |  #2

Grinding noises are not normal. My friend bought a 30mm 1.4 with similar noises and returned it for replacement.




  
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Amamba
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Feb 11, 2012 12:32 |  #3

Not normal. Mine is noticeably quieter than my Tamron was.


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StructuredAmazing
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Feb 11, 2012 14:00 |  #4

DKStrat wrote in post #13867973 (external link)
Got my Sigma in the mail yesterday. So far I really impressed with this lense. Coming from using a tamron 28-75, I think that the sigma is a better lense for crop camera. However, I have noticed a kindof grinding noise with the autofocus when its trying to lock focus. Is this normal? It seems pretty dang sharp on the long end at 2.8 but I've noticed that its pretty soft on the wide end at 2.8. So far I like like it. I think I'm gona miss the extra reach of the 28-75 but I purchased an canon 85mm 1.8 for the long end.
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Keith

grinding noise isn';t normal.
i'd return it if i were you/.


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DiMAn0684
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Feb 11, 2012 14:34 as a reply to  @ StructuredAmazing's post |  #5

going to agree with posters above. My copy is quiet.


Canon 5D MkII | Canon 16-35mm f/4 | Canon 50mm f/1.8 STM | Canon 24-105mm f/4 | Tamron 70-300mm VC | Canon 430EX II | Benro A2682TB1

  
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DKStrat
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Feb 12, 2012 20:15 as a reply to  @ DiMAn0684's post |  #6

Yeah I took a bunch of pictures of it today and It looks like its missing focus pretty bad. It seems intermitten so I guess I'm gona have to give B&H a call tomorrow. Dang I really didn't feel like playing the Sigma lottery. Other than the autofocus grinding/missfocus issues it seems like good glass. Maybe my next copy will be better.


Canon 60d, Sigma 17-50 OS HSM, Canon 85mm 1.8, 2 430exii's, 420ex, ST-E2, lightstands, umbrellas and other misc stuff.... man this is an expensive hobby!

  
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BuckyN8
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Feb 12, 2012 22:01 |  #7

I would return it. Mine is very quiet.




  
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John ­ from ­ PA
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Feb 12, 2012 22:30 |  #8

Make sure you don't have your hand on the focus ring "fighting" the lens doing its own thing.




  
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New Sigma 17-50 OS HSM question
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