Lens question

Discussion in 'Photography Equipment & Products' started by thebeatles, Dec 11, 2009.

  1. thebeatles

    thebeatles TPF Noob!

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    I recently purchased an 85mm 1.8 USM Canon lens for my soon to arrive T1i. When I took it out of the package and looked it over, I noticed that the focus ring turned both ways without stopping, even with the AF switch enabled. Since I am brand new to DSLRs and lenses I was concerned that something was wrong with the lens (as my other lens I just received, a sigma, was the exact oppisite.) So I called B&H QC and the fellow I spoke with told me: "there is no doubt in my mind that it is broken or dysfunctional, send it back." So I sent the lens back and when the new lens came, it had the exact same "issue." So I called B&H and talked to another "camera tech," who told me that this was "completely normal" and that this was a "feature of all USM lenses". I am not sure what to beleive now :lol: So was the first employee correct, or the second?

    Thanks :thumbup:
     
  2. KmH

    KmH Helping photographers learn to fish Supporting Member

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    The second. Nikon lenses do the same thing.

    It's a feature that makes it virtually impossible to manually abuse the focusing mechanism.

    I wonder, did you read the users manual that came with the lens?
     
  3. Josh66

    Josh66 Been spending a lot of time on here!

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    Yup, that's USM. Even without USM, the ring will spin endlessly in either direction - it just won't actually do anything with the lens on AF.
     
  4. thebeatles

    thebeatles TPF Noob!

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    Thanks folks :blushing: I should have read the manual before I called B&H. The first fellow that said it was broken confirmed my false, ignorant fears :lol: I guess I just thought it was strange to receive two conflicting stories from that place. Thanks for putting me at ease and answering my questions. Next time I will read the manual :blushing:
     
  5. Josh66

    Josh66 Been spending a lot of time on here!

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    Just goes to further show that a lot of times salesmen don't know anything except how to make sales... I am a little surprised to hear that B&H is no different than anyone else in that respect though. I guess my expectations were higher for them.
     

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