Door frame

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  • 06-20-2004, 07:36 AM
    Piet
    1 Attachment(s)
    Door frame
    How does one take a photo and have the lines of a door frame parrallell to each other.I can't even spell it.

    Piet
  • 06-20-2004, 10:31 AM
    mikehulsebus
    That comes from the wider angle lens that you're using. You may be able to straighten it in photoshop, though I'm not quite sure how that whole process works
  • 06-21-2004, 10:23 AM
    StillMrFitz
    Apparent Perspective Distortion
    The apparent perspective distortion that you see here is a result of the placement of the camera and lens.

    If you were to place your canera/lens combination in the exact center of the image you wish to photograph and if the corners of the film plane or the digital sensor plane were equidistant from the corners of the subject you wish to photograph then there would be "no" apparent perspective distortion.
    Top, bottom and sides would all be parallel and at right angles to each other.

    This would be true for all lenses with good rectilinear distortion correction, which is most lenses, except for cheap wide angles and fisheye lenses.

    "rectilinear" pretaining to straight lines remaing straight.
    "apparent perspective distortion" distortion caused by the position of the lens in relationship to the subject.

    PFitz



    Quote:
    Originally Posted by Piet
    How does one take a photo and have the lines of a door frame parrallell to each other.I can't even spell it.

    Piet
  • 06-21-2004, 01:35 PM
    Chunk
    Quote:
    Originally Posted by Piet
    How does one take a photo and have the lines of a door frame parrallell to each other.I can't even spell it.

    Piet
    For an SLR you can use this
    http://www.photostuff.co.uk/shftlns.htm
    With a viewcamera you can lower the lens relative to the film while keeping them parallel.
  • 06-21-2004, 02:45 PM
    another view
    Or one of these: http://www.bhphotovideo.com/bnh/cont...=263729&is=REG

    The trick is to get the film plane parallel to the door. On a 35mm camera, that means getting the camera perfectly vertical - in this case. Chunk's option gives you more control and options for composition, but these lenses can get pretty expensive. Slide this level in the hotshoe (where the external flash goes) and level the camera in all directions. Start with the camera at a height of half the height of the doorway.

    I use one of these levels quite often - most of the time I use a tripod, actually. It might look pretty good in the viewfinder, but not when the film comes back!