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When using a fisheye lens, place it in the center of your shot to avoid distorting the horizon line...

When using a fisheye lens, place it in the center of your shot to avoid distorting the horizon line...

Olympus
When using a fisheye lens, place it in the center of your shot to avoid distorting the horizon line.
(Peter Baumgarten, M.ZUIKO 8mm f1.8)