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Thread: Some terms I am not sure of...

  1. #1
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    Default Some terms I am not sure of...

    Eg,

    EF 28-200mm f/3.5-5.6 USM

    What does USM mean?

    EF 28-105mm f/3.5-4.5 II USM

    What does II USM mean?

    EF 17-35mm f/2.8L USM

    Why the aperture no. contain a letter 'L' at the back?

  2. #2
    Moderator ziploc's Avatar
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    Hi Makan007,

    See here for the explaination of USM (Ultrasonic Motor) and L lenses.

    II simply means 2nd generation.


  3. #3
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    Default

    Originally posted by ziploc
    Hi Makan007,

    See here for the explaination of USM (Ultrasonic Motor) and L lenses.

    II simply means 2nd generation.

    Wow, thanks a million.

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