Canon's full-frame, wideangle-to-fisheye zoom lens attempts to offer more than just a one-trick effect. Mat Gallagher finds out whether this lens really should have a place in your kit bag
We tested the Canon EF 8-15mm f/4L Fisheye USM on a Canon EOS-1Ds Mark III and an EOS 7D. An image was taken of our test chart with the lens set to each of its apertures, with the results shown below. Because of the extreme viewing angle of this lens, it wasn’t possible to fill the frame with the chart so the difference in size has been taken into account.