Angle of view of the Tokina Zoom fisheye 10-17mm lens when mounted on some popular cameras

This recent fisheye is sold under the Tokina brand name with either Nikon or Canon mount.

(AF10-17mm f/3.5-4.5) To fit Canon & Nikon-D APS-C Sized Sensor Model Only.

This page of the Tokina catalog tells it all.

One can also read on the lens instruction manual provided in the box together with the lens:

<< .... Do not use it with a digital SLR camera with a solid state imaging device of a size larger than APS-C, nor with a SLR camera designed for silver-halide film.>>

This fisheye model is also sold by Pentax to fit with its own line of *ist cameras. They have partnered with Tokina in the design of the "smc P-DA Fish-Eye 10-17mm F3.5-4.5 ED (IF)" (!)

Well, I have discovered that there is no harm in mounting the lens in front of a "full frame" 24x36mm Canon EOS Camera, for example the EOS 5D. Very good photographs can then been shot. But unfortunately the integrated sun shade limits the potential angle of view.

Therefore all there is to know about the above recommendation that is written on the lens notice is:

When the sun shade is kept as-is on the lens which is mounted on a FF EOS DSLR one shall need much more shots (including Nadir and Zenith shots) than if you shave the sun shade before. Probably the same as with the Nikkor 10.5 mm.

Angle of view of this lens with some of the popular recent DSLR camera.

The Canon EOS 350D and EOS 400D are fitted with a smaller sensor than most of their counterparts. The 350D CMOS is (22.2 x 14.8 mm) in dimension when a Pentax (Sony) CCD measures 23.5 x 15.7 mm.

This is an illustration of the resulting "FOV" of the Tokina zoom fisheye at 10 mm setting mounted on the EOS 350D, on an equirectangular frame:

The angle of view is far from being 180 degrees isn't it?

Another way to illustrate this is shown here for some cameras:

Once again one can see the benefit of shaving the hood!

Panorama made from 350D picts (QTVR 1.6MB)

15 january 2007

Michel Thoby