I have already shown an example of correcting Зенитар (Zenitar) 16/2.8 Fisheye distortion for video (using Gyroflow). For photos, I am more used to using panorama software (Hugin now).
But if we consider Zenitar images as "Normal (rectilinear)", then the a, b, c parameters are not enough to correct the distortion completely. If you change the lens type to "Full frame fisheye", you still need to optimize a, b, c for good enough distortion correction. But it is possible.
Examples of distortion correction: before and after. I left partially visible edges of the result to illustrate the angle of view.
And lens distortion should not be confused with perspective when the camera is tilted (for example, "falling buildings" in the corrected images).
See also related notes:
- Sony a7c: How to get better results with Gyroflow (2023-06-27)
- Hugin (свежим взглядом повторно) (2022-01-25)
- Зенитар-16/2.8 (2006-12-24)
- PTGUI, исправление дисторсии (2006-11-30)
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