The Canon 24mm f1.4 L FD is among the rarest and most desirable Canon FD lens designs. Introduced in 1979, it features an aspherical element in its 10 element / 8 group optical formula which helps to maintain excellent sharpness even when shot wide open at f1.4. Distortion is negligible, and flare and falloff are very well controlled. This lens creates unique possibilities for low-light interior photography. The Canon 24mm f1.4 L FD's expansive angle of view, combined with the shallow depth of field inherent at the f1.4 aperture (especially when focused near to the 1-foot close-focus distance) produces a unique look. Bokeh, not usually a consideration in ultra-wide lenses, is distinctive, with a pronounced "cat's-eye" shape and a concentric ring pattern within.