As questions about lens distortion pop up often I've put this into it's own thread to explain how it works. A fisheye image like this would be transformed into a pin cushion image like this then cropped down to this (note that even if it is saved at the same resolution, the sides of the image is cropped off and the sharpness of the image will suffer) To get more of the image turn off distortion correction and use fisheye correction in post then crop and letterbox Because the image has been stretched and pixels moved around, some of the pixels need to be recalculated. There are different formulas for this calculation some faster, but not as good and some slower but better results. As it has to do this real time multiple times a second, doing it in camera may not give the best and sharpest results. Distortion correction may be best done during post-processing where you can use the (hopefully) more powerful processor on your computer and when processing in realtime isn't necessary. This way not only can you use a better interpolation algorithm but can reframe the image to get the best result.