Which of these two lenses with a DX body .... ??

Discussion in 'Digital Photography' started by igmolinav, Dec 31, 2010.

  1. igmolinav macrumors 65816

    Joined:
    Aug 15, 2005
    #1
    Hi,

    If you had a two cameras, a DX and a FX body, a ¨natural choice¨
    to cover your range from 28 mm. to 50 mm. (Not important how
    much longer the focal length is) could be this lens:

    http://www.bhphotovideo.com/c/search?Ntt=canon+17-55mm&N=0&InitialSearch=yes

    The 17 to 55 mm. f-2.8 covers that range.

    However this lens, also covers the range from 28 mm. to 50 mm.
    when placed on the DX camera, and can also be used as a
    wide angle zoom on the FX body:

    http://www.bhphotovideo.com/c/search?Ntt=canon+16-35&N=0&InitialSearch=yes

    However, how much distorsion is there when using this lens on
    the DX body, knowing this lens is made for FX cameras ?? How
    much distorsion is there when using this lens at 31 mm., (31 mm.
    multiplied by a 1.6 crop factor equals to 49.6 mm. on the DX
    body) ?? How strong is the distorsion, or do images really looks
    as if they had been taken with a normal lens ??

    Thank you, kind regards,

    igmolinav
     
  2. ssmed macrumors 6502

    ssmed

    Joined:
    Sep 28, 2009
    Location:
    UK
    #2
    No distortion

    deleted as thought you were talking Nikon
     
  3. igmolinav thread starter macrumors 65816

    Joined:
    Aug 15, 2005
    #3
    Hi,

    Nikon may have a similar lenses to Canon that you may want to discuss on! I don´t want to limit this thread only to Canon users, when Nikon users may have something to say : ) !!!

    Kind regards,

    igmolinav
     
  4. toxic macrumors 68000

    Joined:
    Nov 9, 2008
    #4
    every lens at 30mm will "look" like a 30mm lens on the same camera. perspective distortion is a myth, the only distortion is from lens design, most commonly barrel or pincushion.

    you should choose based on how important that range is to you and which camera format you use more.
     
  5. igmolinav thread starter macrumors 65816

    Joined:
    Aug 15, 2005
    #5
    Hi Toxic,

    Thank you for your answer : ) !!!

    So, images of any of these two lenses at 30 mm.
    on a DX body will look the same, and the pers-
    pective distortion, if any, will be the same with
    both lenses. Am I correct ??

    Kind regards,

    igmolinav
     
  6. compuwar macrumors 601

    compuwar

    Joined:
    Oct 5, 2006
    Location:
    Northern/Central VA
    #6
    A DX camera simply uses a smaller portion of the len's image circle, so any lens issues will be limited to the same area if an image was taken with an FX body- since the center of a lens tends to be the sweet spot (there are a few exceptions) you'll see sharp, bright and relatively undistorted images on DX just like you would in the middle of an FX image. Nothing about the lens's project changes going from FX to DX, only the amount of the image circle used.

    Paul
     
  7. igmolinav thread starter macrumors 65816

    Joined:
    Aug 15, 2005
    #7
    Hi,

    Thank you for your answer : ) !!!

    Kind regards,

    igmolinav
     

Share This Page