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Sigma 70-300 mm f/4-5.6 DG APO Macro Lens : EF or EF-S

  • 30-08-2010 5:05pm
    #1
    BlueSpud
    Registered Users Posts: 302 ✭✭


    Can anyone tell me if this lense is equivalent to the Canon EF or the EF-S mounts.

    Maybe more correctly, I am looking to buy the Canon 550D which is EF-S. I understand that if I use an EF lens, then the image is subject to cropping to 1.6, which my civilian brain says I am losing a large portion of the image, i.e. the image is diluted.


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  • #2
    DotOrg
    Registered Users, Registered Users 2 Posts: 1,557 ✭✭✭DotOrg


    BlueSpud wrote: »
    Can anyone tell me if this lense is equivalent to the Canon EF or the EF-S mounts.
    Sigma 70-300 mm f/4-5.6 = it will work on all canon cameras, both EF and EFs

    BlueSpud wrote: »
    I understand that if I use an EF lens, then the image is subject to cropping to 1.6, which my civilian brain says I am losing a large portion of the image, i.e. the image is diluted.

    slightly wrong, the cameras sensor in the canon 550 is cropped so no matter what lens you use, it captures a smaller part of the image compared to a camera such as the 5DII or a 3mm film camera which captures a bigger area.

    so wide angles look wider on a full frame camera, but oppositely, a telephoto lens on a cropped sensor camera will give a 'longer' image


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