Canon 75-300 USM vs. non-USM version

Discussion in 'Canon' started by Siddhartha Tambat, Sep 24, 2003.

  1. Hi,

    Does the USM version of the Canon 75-300/4-5.6 III lens focus
    considerably faster than the non-USM version? How big an enlargement
    can I make if I use either of these lenses wide open at 300mm?

    Siddhartha Tambat, Sep 24, 2003
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  2. Siddhartha Tambat

    Lisa Horton Guest

    The difference is noticeable, but not huge.

    Wide open at the long end, this lens is modest at best. Stopped down,
    it's much better, but wide open...

    Lisa Horton, Sep 24, 2003
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