CANON 8 15MM FISHEYE FULL
CANON 8 15MM FISHEYE SOFTWARE
CANON 8 15MM FISHEYE PLUS

CANON 8 15MM FISHEYE FULL

The second type of fisheye is usually known as a full frame fisheye, but in this context 'full frame' doesn't refer to a frame the size of a 35mm negative.

CANON 8 15MM FISHEYE PLUS

If you lay the camera on its back, the image will contain the whole sky, plus the horizon all the way around as in shown below in an image of the entire night sky. This means that the lens has hemispherical coverage. The fist is known as a circular fisheye and it produces a circular image in the center of the frame in which any diagonal of the circular image represents a 180 degree angle of view. There are two major types of fisheye lens. Most advanced image editors also have the capability for conversions of this type. The EOS 7D and EOS 5D MkII are supported, but the original EOS 5D is not.

CANON 8 15MM FISHEYE SOFTWARE

Note that the current version of Canon's DPP RAW conversion software has the capability of fisheye to rectilinear conversion, however it requires that the images be shot with a recent camera. The image below shows a 180 degree fisheye image and its rectilinear conversion: You can see how much more the fisheye sees, as well as the stretching of edge detail you would get with an ultrawide rectilinear lens.įor more technical information on fisheye lenses, field of view and lens mapping, see my article on Fisheye and Rectilinear Lensesįisheye images (or at least 180 degree diagonal fisheye images) can be 'remapped' into the same as would be produced by an extreme wideangle rectilinear lens, though image quality at the edges of the remapped image drops since pixels have to be interpolated in the stretched regions. The whole image is a rectilinear conversion (see below) of a shot taken from the same location using a Canon EF 8-15/4L at 10mm on an EOS 7D. The center section outlined in red is the shot as taken with a Canon EF-S 10-22 lens at 10mm on an EOS 7D. The fisheye just gives a different type of distortion.Ībove is a composite image. The wider the lens, the more such objects are stretched. While the 'distortion' makes the image look odd, rectilinear lenses also distort by stretching objects near the edges of the frame. However for various optical reasons their field of view is limited to something like 120 degrees (diagonal), while a fisheye lens can cover 180 degrees diagonal, and in fact 180 degrees horizontal and vertical as well.

Most of the lenses we use are rectilinear, which means that they reproduce straight lines as straight lines. Why would you want a lens that does this? The answer is that it's the only way to get a really wide field of view. The obvious difference is that one is a zoom and one is a fixed focal length prime lens, but in the case of a fisheye there's a little more to the zoom factor than just a difference in focal length.įisheye lenses bend straight lines that don't run through (or point towards) the center of the field of view. The Canon EF 8-15/4L USM fisheye zoom has replaced the EF 15/2.8 fisheye in the Canon lens lineup.

Canon 8 15mm fisheye