Professional telephotoTELEPHOTOA lens with long focal length capable of making distant objects appear nearer thus larger. Essentially, it isolates and magnifies the subject so that it appears as a full image when shooting from a distance. Telephoto lenses are ideal for photographing subjects that are further away, such as wildlife and sports photography.zoom lensZOOM LENSAllows a camera to, unlike a fixed-focal length or prime lens, change smoothly from a long shot to a close-up or vice versa by varying the focal length. A true zoom lens, also called a parfocal lens, is one that maintains focus when its focal length changes. Due to more moving parts, zoom lenses often produce images of slightly lesser quality than their prime lens counterparts. However due to the inherent flexibility of being able to vary the focal length, they are extremely popular for photography where composition needs to be adapted quickly - such as at weddings, for example.
The EF 70-200mm f/4.0L USM is high performance telephoto zoom lens and provides excellent performance for all general purposes. The compactness and light weight makes it an excellent travel companion. Lens construction features 16 elements in 13 groups with a diagonal field of view of 34-12º.
Fast, silent autofocus action
The lens has USM focussing with a closest focusing distance of 1.2m, and it accepts 67mm screw-in filters. A circular polarising filter can be attached and used without difficulty as the front lens element does not rotate during focusing.
Two ultra-low dispersion elements
Distortions and aberrations are remarkably small for a lens of such capability. This lens combines 1 artificial fluorite element with 2 UD (Ultra-low Dispersion) elements to help achieve images free of secondary spectrum aberrations, which are often the bane of consumer-grade telephoto zooms. It is light enough to not need a tripod collar, but for handling purposes there is an optional tripod collar.
The minimum focusing distance is 1.2m throughout its entire range of focal lengthFOCAL LENGTHMeasured in mm, it is the distance from the focal point of a lens (its centre or curved mirror where light converges) to the plane of the image sensor (film) when an object is in focus. A shorter focal length lens sees a wider image and a longer focal length brings your subject closer. For example, a 15mm lens sees a very wide image and is perfect for landscape photography. Conversely, a 500mm lens sees a very narrow image, brings the subject much closer and is thus great for subjects that are far away, like a bird in a tree. With zoom lenses, its minimum and maximum focal lengths are indicated, for example, as 24-105mm. A zoom lens allows you to change the lens’ focal length, with shorter (wide-angle) and longer (telephoto) options, whereas a fixed focal length lens requires you to move back and forth to find the correct image composition. s, and it accepts 67mm screw-in filters. Note that Iiternal zooming and focusing means that the lens' front element does not rotate.
EF mount L-Series lens
ApertureAPERTUREAperture, shutter speed and ISO form what is known as the exposure triangle in photography. Aperture refers to an opening inside the lens, similar to the iris of your eye, that changes in diameter to control the amount of light that enters a camera. Aperture is expressed in f-stops: the lower the number, the larger the aperture, e.g. f/1.4 is larger than f/8. A larger (or wider) aperture allows more light to pass through the lens to the sensor (film) as a picture is taken, particularly useful in low-light conditions. A larger aperture also produces a shallower depth-of-field, and thus more background blur. range f/4-32
Fluorite and UD lens elements
Ultrasonic autofocus motor
Full-time manual focus override
Internal zooming and focusing
Focus range limiter
Compatible with 1.4x and 2x extenders
Minimum focus distance: 1.2m
67mm filter thread diameter
Metal barrel, metal mount
Full Time Manual Focus
Minimum Focus Distance
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