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 10-22mm at 10mm Canon 10-22mm at 10mm](http://ejlabs.net/wp/wp-content/uploads/2014/03/Canon-10-22mm-at-10mm-700x466.jpg)
![Sigma 8-16mm at 8mm Sigma 8-16mm at 8mm](http://ejlabs.net/wp/wp-content/uploads/2014/03/Sigma-8-16mm-at-8mm-700x466.jpg)
![Tokina 10-17mm at 10mm Tokina 10-17mm at 10mm](http://ejlabs.net/wp/wp-content/uploads/2014/03/Tokina-10-17mm-at-10mm-700x466.jpg)
![Canon 10-22mm at 22mm Canon 10-22mm at 22mm](http://ejlabs.net/wp/wp-content/uploads/2014/03/Canon-10-22mm-at-22mm-700x466.jpg)
![Sigma 8-16mm at 16mm Sigma 8-16mm at 16mm](http://ejlabs.net/wp/wp-content/uploads/2014/03/Sigma-8-16mm-at-16mm-700x466.jpg)
![Tokina 10-17mm at 17mm Tokina 10-17mm at 17mm](http://ejlabs.net/wp/wp-content/uploads/2014/03/Tokina-10-17mm-at-17mm-700x466.jpg)
Canon 10-22 at 10mm vs Sigma 8-16 at 8mm (Hover your mouse over the image to see the different image).
![](http://ejlabs.net/wp/wp-content/uploads/2014/03/Canon-10-22mm-at-10mm-700x466.jpg)