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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 05 Nov 2009 (Thursday) 13:55
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Sigma 30 focus noise

 
shooter ­ mcgavin
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Nov 05, 2009 13:55 |  #1

When my sigma 30 is pointed up or down, past about 45deg there is a noticeable low squeaking noise. This happens whether using af or mf. I've heard of others having this issue, but does anyone know of a solution? Thanks!




  
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tkbslc
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Nov 05, 2009 13:57 |  #2

shooter mcgavin wrote in post #8961078 (external link)
When my sigma 30 is pointed up or down, past about 45deg there is a noticeable low squeaking noise. This happens whether using af or mf. I've heard of others having this issue, but does anyone know of a solution? Thanks!

Mine occasionaly makes what could be described as a squeak sometimes when focusing. I have never pinned it down to certain AF angles, but it seems to still be accurate and fast so I didn't worry about. I just figured it is the sounds of the "Hypersonic" in HSM. :lol:


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ImRaptor
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Nov 05, 2009 15:14 |  #3

Mine has a slight squeak when focused at MFD, but it doesn't seem to have any effect on the AF performance.
It's pretty slight though as if it's not dead silent I can't hear it.


http://imraptor.devian​tart.com/ (external link)
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shooter ­ mcgavin
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Nov 05, 2009 20:34 |  #4

Thanks for the replies. This squeak is definitely more than "slight". Since it happens whether I use AF or MF, I'm guessing that maybe the focus mechanism is too tight or is dying. It sure sounds that way. I just bought it off of ebay, so I think I should be able to get a full refund, since the buyer described it as "like new", "in perfect working order", and "with no problems at all".




  
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Chez ­ Wimpy
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Nov 05, 2009 22:31 |  #5

Mine has had that sound (at +/-45degree) since the beginning... 10k pictures and over four years later, it still works fine. "If it ain't broke" yada yada...


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SnapLocally.com
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Nov 05, 2009 22:35 |  #6

I bought mine used and had similar thoughts at first. But it performs well, and cost 1/3 what the alternative cost at 90% of the performance. Color me pleased.


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shooter ­ mcgavin
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Nov 06, 2009 14:31 |  #7

Well that's good to hear that the sound doesn't necessarily mean the focus is going bad. I'm not too concerned about the noise itself, but more that what could be causing it could lead to further problems down the road. I love the lens, so I'm still debating whether or not to return it.




  
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ImRaptor
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Nov 06, 2009 15:40 |  #8

Tried mine a bit more out of curiosity, and it really is only present when I've tilted the camera on an angle.


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Sigma 30 focus noise
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