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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 25 Jun 2014 (Wednesday) 14:48
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sigma 70-200 2.8 os Noise

 
Jaejin0417
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Jun 25, 2014 14:48 |  #1

Just got my sigma 70-200 2.8 os. Iq is a lot better than most claim. However, sometimes when af and Os engages, it sort of makes a clunking sound. Is this normal? It's not super loud, but noticeable.


Canon 70D
Sigma 70-200 2.8 OS
Canon 24-70 2.8L

  
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GeoKras1989
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Jun 25, 2014 16:18 |  #2
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Mine makes a noticeable plasticky thunk when the OS engages. It does it again when the OS dis-engages, about two seconds after you let off the AF button. I've had it over two years, it has always done that. Seems normal to me. Lens works fine.

I agree with about the IQ; this lens is quite good.


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Jaejin0417
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Jun 25, 2014 16:50 |  #3

Okay, glad to know that's it's pretty normal. Does your af make gear noises when using continuous focus? Seems like I've been spoiled with Canon IS and USM


Canon 70D
Sigma 70-200 2.8 OS
Canon 24-70 2.8L

  
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joeblack2022
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Jun 25, 2014 17:05 |  #4

If you do a search for noise and IS on the forum, it has been reported as normal on a wide variety of lenses.


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GeoKras1989
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Jun 25, 2014 21:36 |  #5
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The gear noise thing got my attention, so I checked out my Sigma. I do get a high-pitched gear-y type noise during AI-Servo. It is so quiet, though. I couldn't hear it in room with normal conversation going on. It is noisier than my USM lens, for sure. Bothersome? Hardly. I really don't think someone sitting next to me in church would hear it.


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Jaejin0417
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Jun 26, 2014 13:46 |  #6

Anyone else notice poor af lock when going from far distance to close?


Canon 70D
Sigma 70-200 2.8 OS
Canon 24-70 2.8L

  
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GeoKras1989
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Jun 26, 2014 13:57 |  #7
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Jaejin0417 wrote in post #16995999 (external link)
Anyone else notice poor af lock when going from far distance to close?

One Shot or AI Servo, or both?

I just tried mine in both modes with the center point of a 6D.
One Shot: Infinity to 8 feet in bright sunshine, instantaneous and accurate. Infinity to 8 feet (indoors) instantaneous and accurate.
AI Servo: Infinity to 8 feet in bright sunshine, subject in focus before I could possibly be ready to press the shutter. Didn't try it indoors.

I've never had a Canon 70-200 IS, so I have nothing to compare this too. My Sigma does what I need it to do, nicely.


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Jaejin0417
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Jun 26, 2014 14:19 |  #8

Maybe wasn't enough lighting, but sort of doubt. Was using one shot. Wish I had another copy of the same lens to compare it to!


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Sigma 70-200 2.8 OS
Canon 24-70 2.8L

  
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GeoKras1989
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Jun 26, 2014 15:44 |  #9
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It seems we are the only two who will admit using this lens. Everyone else has upgraded to Canon or Tamron!


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Jaejin0417
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Jun 27, 2014 00:43 |  #10

Haha I'm liking the iq of the lens so far, so I guess not much need to to to Tamron or Canon. Ignorance is bliss ;D


Canon 70D
Sigma 70-200 2.8 OS
Canon 24-70 2.8L

  
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joeblack2022
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Jun 27, 2014 10:28 |  #11

GeoKras1989 wrote in post #16996199 (external link)
It seems we are the only two who will admit using this lens. Everyone else has upgraded to Canon or Tamron!

Mmm, no.

https://photography-on-the.net/forum/showthre​ad.php?t=915516


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Jaejin0417
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Jun 28, 2014 22:55 |  #12

Geokras, I'm having trouble, well the lens is, focusing from minimum focus to somewhere near 12ft. About 50%.. Doesn't even attempt to focus half the time. Outdoors, good lighting. I'm using 40d.. Could that be a problem? Focuses 24-105 fine


Canon 70D
Sigma 70-200 2.8 OS
Canon 24-70 2.8L

  
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GeoKras1989
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Jun 28, 2014 23:26 |  #13
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Under what conditions is it performing that poorly? Center-point only? One-shot AF on a stationary target? Good light? Fast enough shutter.

When I do my part, my Sigma 70-200 OS has never let me down. One-shot or AI-servo - doesn't matter. The only time mine has choked is in AI-servo with the target coming straight at me at 60+ mph, when the targets get too close.

I did some searching and the only AF problem I can find with this lens is when people expect it to be PARFOCAL. The Sigma 70-200mm f/2.8 OS HSM is NOT parfocal. If you change the zoom, you have to refocus. This is not unusual; most zooms behave that way. If you are getting OOF shots, while doing your part, my guess is the lens is due for trip to Sigma for evaluation/repair. Be certain that you are doing your part, first.


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Jaejin0417
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Jun 28, 2014 23:50 |  #14

Tried with both one shot and continuous, both stationary and moving target. Good light, was outdoors, maintaining about 1/500.
Tried center point and outer focus points as well.. Strange..


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Canon 24-70 2.8L

  
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GeoKras1989
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Jun 29, 2014 05:18 |  #15
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Strange? Broken? Maybe time for a trip to Sigma?


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sigma 70-200 2.8 os Noise
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