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Thread: USM check..

  1. #1

    Default USM check..

    guys how do u know if my USM is faulty? how do i check?

  2. #2
    Senior Member Kit's Avatar
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    Default Re: USM check..

    erm..... when your lens don't focus anymore?

  3. #3
    Member
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    Default Re: USM check..

    Quote Originally Posted by Kit View Post
    erm..... when your lens don't focus anymore?
    lol... ya..

    USM is the motor for AF. if it dosent even move and focus while u try to use AF then its faulty.
    EOS 6D | GH4 | LX100 | HERO4

  4. #4

    Default Re: USM check..

    Quote Originally Posted by Fragnatic View Post
    lol... ya..

    USM is the motor for AF. if it dosent even move and focus while u try to use AF then its faulty.
    ok..i see...i try to foucs yes can ..but seem slow when focus in normal room light...in bright place or aim @ light it will focus relaly fast..is it normal?

  5. #5

    Default Re: USM check..

    Quote Originally Posted by antonnius View Post
    ok..i see...i try to foucs yes can ..but seem slow when focus in normal room light...in bright place or aim @ light it will focus relaly fast..is it normal?
    Depends on the exact lens. Some canon lenses really do hunt a bit more in low light.
    Alpha

  6. #6
    Member
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    Default Re: USM check..

    Quote Originally Posted by antonnius View Post
    ok..i see...i try to foucs yes can ..but seem slow when focus in normal room light...in bright place or aim @ light it will focus relaly fast..is it normal?
    hmm... in normal room light at night might be considered dim as well.
    speed of AF also depends on the camera body as well. what body are u using?
    EOS 6D | GH4 | LX100 | HERO4

  7. #7

    Default Re: USM check..

    Quote Originally Posted by Fragnatic View Post
    hmm... in normal room light at night might be considered dim as well.
    speed of AF also depends on the camera body as well. what body are u using?


    350D hehe

  8. #8

    Default Re: USM check..

    Quote Originally Posted by Rashkae View Post
    Depends on the exact lens. Some canon lenses really do hunt a bit more in low light.
    i see dat super interesting
    something new for me

  9. #9

    Default Re: USM check..

    is it worth to repari USM if spoilt?

  10. #10

    Default Re: USM check..

    Quote Originally Posted by antonnius View Post
    guys how do u know if my USM is faulty? how do i check?
    If you have a friend with the same body / lens combination, check to see if the other camera also behaves the same. If it is, then nothing to worry about. If not, swap his lens with yours. If your camera body and friend's lens is okay, then your lens is the problem. If your friend's camera and your lens is okay, then maybe there is something wrong with your camera body.

  11. #11

    Default Re: USM check..

    Quote Originally Posted by antonnius View Post
    ok..i see...i try to foucs yes can ..but seem slow when focus in normal room light...in bright place or aim @ light it will focus relaly fast..is it normal?
    all cameras will take longer to focus at low light. sometimes its a particular lens that will be slower because of design.

  12. #12

    Default Re: USM check..

    ok buddy thanks everyone

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