I am experimenting with using Pix4D for indoor mapping (capturing rooms) using a mobile phone camera and have had good results so far.
To capture a wider field of view I have bought a clip-on fish eye lens, which seems to capture reasonable quality images. However, I do not seem to be able to get Pix4D to process them, and always get a camera calibration error. I suspect I need to manually edit the camera model, but I do not know what settings to change.
I have created a new camera model type, changed the lens type to fisheye and set the Affine transformation C and F to the image width.
The images are currently rectangular from the phone, though the captured image is a circle: is this contributing to the problem?