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Defishing the Zenitar 16mm Fisheye Lens

Uncorrected fisheye image.
Zenitar 16mm on a Pentax *ist Ds
Fisheye distortion removed with PTLens.
PTLens does a nice job but chops a fair amount off of the sides.
Defished with the canvas first enlarged 113.3% horizontally to regain the sides of the image that PTLens chops off.

PhotoShop's Spherize filter is used to fit the image back into the original frame size.  Not always a good idea as it makes the furnishings too narrow.



With the verticals corrected.
Keeping the camera level can be important with this lens.


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