The EF 35-350mm f/3.5-5.6L USM lens is a discontinued telephoto

Telephoto lens

In photography and cinematography, a telephoto lens is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length. This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus...

 zoom lens

Zoom lens

A zoom lens is a mechanical assembly of lens elements for which the focal length can be varied, as opposed to a fixed focal length lens...

 manufactured by Canon.

This lens has an EF

Canon EF lens mount

Introduced in 1987, the EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens...

 type mount, that fits the Canon EOS

Canon EOS

The Canon EOS autofocus 35 mm film and digital SLR camera system was introduced in 1987 with the Canon EOS 650 and is still in production as Canon's current DSLR system...

 line of cameras. It was introduced in January 1993. Featuring the highest magnification (10x) of any interchangeable SLR lens at the time, the lens was and is popular among photojournalists

Photojournalism

Photojournalism is a particular form of journalism that creates images in order to tell a news story. It is now usually understood to refer only to still images, but in some cases the term also refers to video used in broadcast journalism...

. It has now been superseded by the Canon EF 28-300mm lens

Canon EF 28-300mm lens

The EF 28-300mm f/3.5-5.6L IS USM lens is a superzoom lens made by Canon Inc.This lens has an EF type mount, that fits the Canon EOS line of cameras....

. When used on a digital

Digital photography

Digital photography is a form of photography that uses an array of light sensitive sensors to capture the image focused by the lens, as opposed to an exposure on light sensitive film...

 EOS

Canon EOS

The Canon EOS autofocus 35 mm film and digital SLR camera system was introduced in 1987 with the Canon EOS 650 and is still in production as Canon's current DSLR system...

 body with a field of view

Crop factor

In digital photography, a crop factor is related to the ratio of the dimensions of a camera's imaging area compared to a reference format; most often, this term is applied to digital cameras, relative to 35 mm film format as a reference. In the case of digital cameras, the imaging device would be a...

 compensation factor of 1.6x, such as the Canon EOS 7D

Canon EOS 7D

The Canon EOS 7D is an 18.0 effective megapixel APS-C crop CMOS digital single-lens reflex camera made by Canon. It was announced on September 1, 2009...

, it provides a narrow field of view, equivalent to a 56-560mm lens mounted on a 35mm

35 mm film

35 mm film is the film gauge most commonly used for chemical still photography and motion pictures. The name of the gauge refers to the width of the photographic film, which consists of strips 35 millimeters in width...

 frame body.

The lens contains 21 elements in 15 groups. As an L-series

Canon l lens

An L lens is a line of SLR photography lenses made by Canon.L lenses are Canon's top-of-the-line lenses. The "L" officially stands for "Luxury", a reference to the lenses' high price and proclaimed build quality. The use of "ASPH" was common to notate aspherical elements throughout Canon's and...

 lens, it features two ultra-low dispersion

Dispersion (optics)

In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency, or alternatively when the group velocity depends on the frequency.Media having such a property are termed dispersive media...

 (UD) elements, and utilizes Canon's ring USM

Ultrasonic motor

An ultrasonic motor is a type of electric motor powered by the ultrasonic vibration of a component, the stator, placedagainst another component, the rotor or slider depending on the scheme of operation...

 for fast and silent focusing focusing. It has a push-pull zoom design with the possibility to lock the lens at the desired focal length. The lens exhibits strong barrel distortion

Barrel distortion

In geometric optics and cathode ray tube displays, distortion is a deviation from rectilinear projection, a projection in which straight lines in a scene remain straight in an image...

 and chromatic aberration

Chromatic aberration

In optics, chromatic aberration is a type of distortion in which there is a failure of a lens to focus all colors to the same convergence point. It occurs because lenses have a different refractive index for different wavelengths of light...

 at the wide end. On an APS-C

APS-C

Advanced Photo System type-C is an image sensor format approximately equivalent in size to the Advanced Photo System "classic" size negatives...

 body, the lens shows almost no vignetting

Vignetting

In photography and optics, vignetting  is a reduction of an image's brightness or saturation at the periphery compared to the image center. The word vignette, from the same root as vine, originally referred to a decorative border in a book. Later, the word came to be used for a photographic...

, even at its maximum aperture

Aperture

In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane. The aperture determines how collimated the admitted rays are,...

, 5.6, at 350mm.