My first encounter with the phenomenal GoPro cameras. This camera has now been handed over to my son who rides a mountain bike, and puts it to better use than I have ever done.
A flimsy lightweight lens of mediocre mechanical and optical quality, but still ... 19mm on a fullframe camera is a feat after all. Not one that I have used much.
Simple samples shot to demonstrate the differences between the Sigma 10-20mm, the Sigma 8-16mm and the Nikon 10.5mm fisheye. You can click on samples to see larger copies of the images.