Posted 01 September 2012 - 09:00 PM
The 12-24 and 11-16 are both rectilinear lenses while the 10-17 is a fisheye lens. For the same focal length fisheye lenses have a much wider field of view (FOV) than a rectilinear lens. FOV of the 10-17 is 180° to 100° while the 11-16 is only 104° to 82°. The minimum focus distance of the 10-17 is 140mm while the 11-16 is over twice that at 300mm. With much closer minimum working distance and wider field of view the 10-17 is a much better lens for close focus wide angle shooting. I used to use a Tokina 12-24 as my UW wide angle lens until the 10-17 was released and since purchasing the 10-17 my 12-24 has rarely gone underwater.
Canon 7D, Nauticam NA-7D housing, 2 x Inon Z240, 1 x Inon S2000, Tokina 10-17 & 12-24, Sigma 17-70 Macro, Tokina 35 macro, Canon 60 & 100 macro, Tamron 2X & Kenko 1.X Teleconverters.