Shooting with Fisheye Lenses is always a treat. Because they usually do not take up a lot of space in my gear bag, and do not weigh much, I like to take one along when I go landscaping.

This set of images was taken at Helton Falls GA. The EF 11-24 Images on the EF 11-24 sample image page make for a good contrast and comparison to the 8-15mm - highlighting the difference in non-rectilinear images (Fisheye) v. rectilinear (11-24).

Canon EF 8-15mm f/4L, EOS 5D MKIV, 15mm, ISO 2500, f/4, 1/2000 Sec.

Here is a slightly different angle but still at 15mm. Note the extra detail this very sharp lens brings out in the rocky foreground against the blur motion of the waterfall.

Canon EF 8-15mm f/4L, EOS 5D MKIV, 15mm, ISO 50, f/11, 3/10 Sec.

This is the same exposure parameters as the prior photo, but zoomed out to 8mm. As you can see, the lens becomes a true circular fisheye at this focal length. Note the included tripod leg!! this lens is so wide that feet and tripod legs get caught if you don't pay close attention to the borders and distracting elements. 

Canon EF 8-15mm f/4L, EOS 5D MKIV, 15mm, ISO 2500, f/4, 1/2000 Sec.