What is the different between EF Lenses and EF-S Lenses ?

Discussion in 'Digital Photography' started by hasithakaru, Sep 13, 2007.

  1. hasithakaru

    hasithakaru Guest

    What is the different between EF Lenses and EF-S Lenses ?
    hasithakaru, Sep 13, 2007
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  2. hasithakaru

    John Ortt Guest

    EF-S lenses are designed specifically for the smaller sensors forund in many
    digital SLR cameras. They therefore won't work with all Canon EOS cameras.

    The normal EF lenses will work with all EOS cameras (TTBOMK).

    More info available here: http://en.wikipedia.org/wiki/Canon_EF-S_lens_mount
    John Ortt, Sep 13, 2007
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  3. hasithakaru

    Chuck Olson Guest

    The EF-S (-S means "Short" back focus) lenses poke further into the camera
    than the EF lenses. Either will go on cameras with APS-C size sensors (1.6
    crop factor), since there is a little more room in them for the extra depth
    of the lens. However any camera with a full size sensor must use only EF
    lenses to avoid interference between the lens and camera innards.

    The image circle for high picture quality on an EF-S lens is smaller,
    because it only has to match the smaller APS-C size sensor. But since the EF
    lens is made for a full size image, it will work even better on a camera
    with the APS-C size sensor, with less fall-off of brightness and resolution
    in the corners. That's why, for instance, the Canon EF 28-135 f/3.5-5.6 IS
    USM is such a fantastic lens for the 30D and the new 40D cameras.
    Chuck Olson, Sep 13, 2007
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