Simple FOV comparison between Canon 10-22mm (rectilinear) & Sigma 8-16mm (rectilinear) & Tokina 10-17mm (fisheye). All image shot with a Canon 70D (APS-C) on tripod.
Canon 10-22 at 10mm vs Sigma 8-16 at 8mm (Hover your mouse over the image to see the different image).
