Canon FD Ultra-Wide 17mm F4. High Resolution Full Frame Prime Lens. Rare, compact, fantastic lens in absolutely perfect condition.

Considering its spectacular angle of view and overall performance, this FD lens is a very attractive Ultra-Wide lens for super wide-angle photography.
It is ideally suited to a wide variety of applications, such as architecture, fashion or journalism.
With the incorporation of the Canon Floating System, image quality should be improved even at close focusing distance.

The super wide-angle 17mm allows us to see the world with a more encompassing view. It's a lens that can be used close up for a subjective view of the world around us or at longer focusing distances to get a more objective view. There can be a danger of overusing its abilities thereby reducing its true potential for creative photography. Because the super wide-angle lens can encompass so much, there is a need to compose selectively. Because the various wavelengths of light are refracted at different rates, lateral chromatic aberration can diminish image quality. Two groups of cemented convex and concave lenses located behind the diaphragm serve to control this aberration. In the last convex lens, the use of special glass with a higher index of refraction and lower dispersion quality results in very high resolution and contrast.

One of the strong points of a 17mm focal length lens is its rectilinear lens design that produces straight lines as straight lines without distortion. It is, therefore, a perfect choice for photographing in tight quarters with a restricted camera-to-subject distance. Buildings with many straight lines are natural subjects for this FD 17rnm lens. Photographing a building from a direct angle with the camera held level will result in a natural looking, undistorted image.
The Canon FD 17mm f/4 is not a lens intended just for outdoor photography. You may also find it indispensable for indoor photography, particularly where the subject - an interior, for example - is large and the working distance is severely limited.

You may also use the deep depth-of-field inherent in this lens for scenes that may require high shutter speeds but still yields vast amount of sharper zones to your advantage. For example, by setting the lens distance scale at ten feet, everything from about five feet to infinity will look relatively sharp on film. This means that precise focusing is not always imperative, so this lens is particularly helpful when there's little time to focus, such as when photographing fast action.

The CANON FD 17mm F4 ultra-wide lens is in immaculate condition, with no flaws at all.
Comes with HOYA professional 72mm UV filter.

A big photo gallery of images taken with Canon FD 17mm F4 lens you can see here: https://www.flickr.com/photos/tags/canon%20fd%2017mm%20f4/