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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 23 Aug 2011 (Tuesday) 12:07
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USM vs HSM

 
ar10
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Aug 23, 2011 12:07 |  #1

So apples to apples, assuming both lenses are calibrated correctly - are there any major differences between HSM and USM? Is the AF just as fast and accurate? I'm trying to decide between the Canon 17-55 and Sigma 17-50.. wondering if the $500 is worth it seems IQ similar and build is even better on the Sigma.




  
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bucket772
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Aug 23, 2011 12:18 |  #2

HSM and USM are the same thing. One manufacturer calls it one thing and one calles it another. Sigma calls thiers OS.

Correct me if I am wrong...



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jackerin
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Aug 23, 2011 13:18 |  #3

bucket772 wrote in post #12985204 (external link)
HSM and USM are the same thing. One manufacturer calls it one thing and one calles it another. Sigma calls thiers OS.

Correct me if I am wrong...

AF:
USM (Ultra-sonic motor) = Canon, HSM (Hyper-sonic motor) = Sigma, USD (Ultra-sonic drive) = Tamron.

Stabilization:
IS = Canon, OS = Sigma, VC = Tamron.


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tkbslc
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Aug 23, 2011 13:25 |  #4

And as always there are big differenes even within lineups. Some Canon USM lenses seem markedly peppier and smooth than others. Same with Sigma. (Tamron only has one USD lens so far, so hard to say there)


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Mark-B
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Aug 23, 2011 13:28 |  #5

I have Canon lenses with USM and Sigma lenses with HSM. The Canon lenses are a little faster, but you have to compare them directly to notice a difference. I've never found myself thinking that any of my HSM lenses were focusing too slowly when using them under normal shooting conditions.


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bucket772
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Aug 23, 2011 13:35 |  #6

jackerin wrote in post #12985581 (external link)
AF:
USM (Ultra-sonic motor) = Canon, HSM (Hyper-sonic motor) = Sigma, USD (Ultra-sonic drive) = Tamron.

Stabilization:
IS = Canon, OS = Sigma, VC = Tamron.

I realized my error after I hit send. Here in the east we just had a mild earthquake. I was a little distracted. Thanks for pointing my error out



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pulsar123
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Aug 23, 2011 13:36 |  #7

AF speed doesn't just depend on the type of the motor, but also on how much glass it has to move, and how far. I am sure the weight of the glass to move, and the travel distance are not identical in the two lenses in question (Canon 17-55 and Sigma 17-50).

I haven't owned the Canon, only the Sigma. For me, it focuses fast enough (much better than my previous zoom, Tamron 17-50).


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J_O_S_H_U_A
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Aug 24, 2011 08:34 |  #8

I have used both Sigmas HSM and Canon's USM and noth are very good, but Canon's seems to be a tiny bit faster, but much quieter. I was dissapointed with HSM at all, specially with the price difference.


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ceegee
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Aug 24, 2011 09:00 |  #9

I've tried Sigma's HSM and Canon's USM, and honestly, in everyday shooting conditions, you're not going to notice any difference. Both are terrific.


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msowsun
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Aug 24, 2011 20:27 |  #10

Just like Canon makes Ring Type USM and Micro Motor USM, Sigma also makes TWO types of HSM. If you have a Sigma lens with a rotating focus ring and no focus distance window (Sigma 17-50, 17-70, etc) it is not the equal of Canon's Ring Type USM. (lacks FTM for example)(also slightly slower and noiser)

Other Sigma's like the 30mm, 50mm, 50-150mm, 70-200mm, etc., do have an excellent version of HSM and it is pretty much equal to Canon's USM.

I have no experience with Tamron's USD, so I can't comment.


Mike Sowsun / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 100-400 II / EF 1.4x II
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msowsun
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Aug 24, 2011 20:35 |  #11

Here are some videos so you can see and hear the difference:

Sigma 17-50 HSM

http://www.youtube.com …osmrXBFm8&featu​re=related (external link)

http://www.youtube.com​/watch?v=F14IXyqs8jw&N​R=1 (external link)


VS....


Canon 17-55 USM:

http://www.youtube.com​/watch?v=VKxCzOYGWyU (external link)

http://www.youtube.com​/watch?v=IBlzJx9h2TA (external link)


Mike Sowsun / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 100-400 II / EF 1.4x II
Full Current and Previously Owned Gear List over 40 years Flickr Photostream (external link)

  
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USM vs HSM
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