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Old 28th February 2008, 19:08   #85  |  Link
guth
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Join Date: Apr 2003
Location: Uppsala, Sweden
Posts: 157
Actually, this effect doesn't come from the fact that wide angle lenses often are imperfect, but rather from the nature of wide angles.

Most wide angle lenses are usually either rectilinear or fisheye. I guess it's pretty obvious that fisheye lenses will give strange results when deshaking, but the fact is that even perfectly rectilinear lenses will look a bit weird (which that sequence above demonstrates). Here's my attempt at explaining why, in a hopefully easy to understand way...

A rectilinear lens will make straight lines in the world appear straight on the image too. Now, imagine you're taking a close wide-angle picture of a chessboard. All squares will get the same size on the image even though the outer squares are further from the camera than the squares in the middle. This essentially means that objects are magnified when they are close to the edge. When you turn the camera to point at an outer square it will get smaller on the image.

And deshaker doesn't like it when objects change size when you pan the camera...
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