A&P Wait, do Canon DSLR bodies have an internal focus motor built in?

Discussion in 'Lifestyle' started by tenxia, May 8, 2008.

  1. tenxia

    tenxia OT Supporter

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    http://photo.net/equipment/canon/

    I shoot Nikon. Hope you Canon users can enlighten me.
     
  2. OneTwo

    OneTwo me>you OT Supporter

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    "USM is "ultrasonic motor". All Canon EOS-system lenses have built-in focus motors. There is no motor in the body as is the case with Nikon, for example."
     
  3. nine

    nine OT Supporter

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    thats why nikon MF lenses work on new bodies, and why canon users had to get new lenses when they went AF.

    nikon decided to keep things easier for their existing customers, canon decided to go with the better system even though it meant existing customers would have to get all new lenses.

    it's also why there was a shift to canon for a lot of sports photographers, as in body AF was much slower than in lens AF.
     
  4. nastyboy132

    nastyboy132 New Member

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    it's because canon shooters aren't all broke because we make money with our stuff. unlike the ni*** hobbyists. :p
     
  5. Dwight Schrute

    Dwight Schrute New Member

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    :rolleyes:
     
  6. tenxia

    tenxia OT Supporter

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    So almost all Canon EF and EF-S lenses have USM?

    And what about 3rd party lenses? I noticed Tamron/Tokina/Sigma for Canon are about the same price as Nikon ones. Do they have an extra motor inside or something?
     
  7. IntheWorks

    IntheWorks windin film.. takin pics Moderator

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    I don't believe the low end lenses have USM.
     
  8. tenxia

    tenxia OT Supporter

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    so how does it AF?
     
  9. g33k

    g33k OT Supporter

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    it uses a non-usm motor :mamoru:
     
  10. ballz

    ballz Two of 'em OT Supporter

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    USM just means its a quiet motor. the non ultrasonics are loud and annoying.
     
  11. Hyperite

    Hyperite Vagina Junction OT Supporter

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    USM just means ultrasonic motor focusing. it's an internal system (meaning the length of the lens doesn't change and the end of the lens doesn't rotate) as compared to non-USM AF, which still has an internal motor, but isn't as quiet and changes the footprint of the lens, and spins your polarizer :run:
     
  12. ballz

    ballz Two of 'em OT Supporter

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    wrong. some, if not most, USMs still change length. My 17-85 and 50 1.4 do, I know that for a fact.
     
  13. Hyperite

    Hyperite Vagina Junction OT Supporter

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    :o my 10-22 doesn't, which i thought was one of the big "gets" of USM, but thanks for setting me straight
     
  14. mobbarley

    mobbarley Active Member

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    USM just (usually) means: quieter, faster, accurate, fulltime manual focuing
     
  15. Harry Caray

    Harry Caray Fine purveyor of x.264, h.264 & TS HD-Video !!! HD

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    that is not true...

    "L" glass is not the only ones to have it.... the 70-300 IS USM has it, and yet does not have full time manual.

    USM is only the motor technology for the focusing. THAT'S IT. nothing else...

    Nothing more..

    They use less energy, are quieter and faster as stated in previous posts, but are NOT exclusive to Canon and "L" glass only... other manufacturers are using the technology as well.
     
  16. tenxia

    tenxia OT Supporter

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    USM is pretty much equivalent to AF-S for nikon right?

    but once again, 3rd party lenses that don't have this kind of motor built in, can AF with Canon bodies right?
     
  17. mobbarley

    mobbarley Active Member

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    okay from memory there is USM and ring USM (canon marketing is gay), being L or not has nothing to do with it (except that most should have ring USM)
     
  18. tenxia

    tenxia OT Supporter

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    no one has any comment on 3rd party lenses?
     
  19. f/2.8L

    f/2.8L New Member

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    Never bought any 3rd party stuff, so I have no input here.
     
  20. DeepRun™

    DeepRun™ Guest

    You're describing IF (internal focusing). Where the lens elements move inside the housing instead of the housing extending/retracting. Some 3rd party lenses do this.
     
  21. Jcolman

    Jcolman OT Supporter

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    My Tamaron 90mm macro has a motor. It's noisy compared to the Canon lenses.
     
  22. aCab

    aCab New Member

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    All Canon EF and EF-S mount lenses have AF motors in the lens. Some motors are better than others.
     
  23. g33k

    g33k OT Supporter

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    all third party lenses for canon will have some kind of motor. nobody wants to buy a lens that doesn't af
     
  24. tenxia

    tenxia OT Supporter

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    you'd think 3rd party canons would cost more since they have that extra AF motor inside (as opposed to nikon versions).

    But canons are priced the same, if not less. what gives?
     
  25. SugarCoatedSour

    SugarCoatedSour Active Member

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    :hsugh:
     

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