lense distortion

Discussion in 'Photography Beginners' Forum' started by shingfan, Feb 2, 2007.

  1. shingfan

    shingfan TPF Noob!

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    how do you know if a lense has distortion at a specific focal length?...what do you look at?....what would be a good test to find out?
     
  2. Steph

    Steph No longer a newbie, moving up!

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    I guess a starting point would be to set up your camera on a tripod and take a picture of a grid (making sure the grid is parallel to the film plane) and look if the lines are straight in the pictures (particularly around the edges).
     
  3. Garbz

    Garbz No longer a newbie, moving up!

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    To save yourself some of the hard work look at www.photozone.de if the lens has been reviewed. They have test shots of such grids with a correct grid displayed over it.
     
  4. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    If it isn't obvious to the naked eye in your photos, does it even matter?
     
  5. shingfan

    shingfan TPF Noob!

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    it was something that i was discussing with my friend.......we cant even see the distortion if it is there.....so what does it matter?
     
  6. DSLR noob

    DSLR noob TPF Noob!

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    They say if you take a picture of a building, particularly with a wider angle lens, you should look at the horizon and straight lines particularly near the edges.
     
  7. Alex_B

    Alex_B No longer a newbie, moving up!

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    well, shoot horizons off-centre .. you WILL see

    shoot architecture with well defined lines you WILL see ALOT distortion with almost all lenses out there. it is worst with those steel and glass temples of the recent 20 years ...

    shoot indoor architecture with really wide angle ... you will shoot yourself because you cannot live with that much distortion :p
     

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