This standard lens offers perfect image quality at all apertures and focusing distances, due to the inclusion of one aspheric-surfaced element and the adoption of the Canon Floating System. It is a lens that can be used at maximum aperture without reservations. When photographing at night, or in conditions of normally high flare, the aspherical construction of this lens results in photographs which are almost 100% free from flare and ghost images. It offers no-compromise excellence in any lighting. 58 Lenshood: optional BS-58