Another newbie question about lens

Discussion in 'Photography Beginners' Forum' started by Robin Usagani, Jun 22, 2010.

  1. Robin Usagani

    Robin Usagani Been spending a lot of time on here!

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    Lets say I have the canon 10-22mm super wide angle lens. I set that to 18 mm with my 1.6x crop body. Now I take similar shot with my 18-55mm lens kit and set it to 18mm. Will I get the same perspective?

    Is "wide angle" lens pretty much a low zoom lens? I understand that at 18mm you probably dont see the full wide angle look due to the cropping.

    Thanks!
     
  2. Village Idiot

    Village Idiot No longer a newbie, moving up!

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  3. KmH

    KmH Helping photographers learn to fish Supporting Member

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    The focal length is an approximation so the framing may be a little different.

    In other words, assuming the same camera position, the 10-22 may be actually set set to 17.6 mm and the 18-55 set to 18.3 mm though looking at the zoom ring on both, it may look like they are both set to 18mm.
     
  4. Robin Usagani

    Robin Usagani Been spending a lot of time on here!

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    OK.. so 1.6X crop factor has a sensor size of 22.2x14.8. So if I set my 18-55mm lens kit to 18mm, since it is smaller than the width of my sensor, my picture will get distorted correct? It will produce a similar picture with 10-22mm if I set it to 18. It just that the latter lens is able to go to 10 and distort it even more?
     
  5. KmH

    KmH Helping photographers learn to fish Supporting Member

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    No, that's not entirely correct.

    The wider the field of view a lens can 'see' the more radical the shape of the various lens elements, and that is what causes distorion of the image.

    It is easier (and less expensive) to correct for disortion in an 18-55 mm lens because of the longer focal ratio, than it is in a 10-20 mm lens.


    Wide-angle lens - Wikipedia, the free encyclopedia
     
  6. Dwig

    Dwig TPF Noob!

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