The 17-35mm f/4 Pro FX Lens for Canon Cameras from Tokina is designed for use with a Canon full frame digital or film camera. This ultra wide-angle lensWIDE-ANGLE LENSHas a short focal length, hence a field covering a wide angle, ideal for architectural, interior and landscape photography where the photographer may be unable to move further away from the scene to photograph it. Wide-angle lenses come in both fixed-focal length and zoom lens varieties. gives you a 103.9º angle of view at the 17mm end of the zoom, and a bright, constant f/4.0 maximum 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., making it ideal for low light photography. Two Super-Low Dispersion glass elements and one aspheric glass element produce superior contrastCONTRASTThe difference between areas of different brightness levels in a photograph: A high-contrast image has a greater difference between light and dark areas, whereas a low-contrast image has a narrow range of tones. Contrast is used to direct a viewer’s attention to a photographer’s subject either with colour contrast (bold versus duller colours) or tonal contrast (bright versus darker tones). and sharpness, and help control chromatic aberration.
Tokina's One-Touch Focus Clutch Mechanism provides a quick and simple way to switch back and forth between autofocus and manual focus. The lens has been designed using improved seals, making it "water-resistant" (not waterproof), so that damp conditions won't spoil your shooting expeditions. The lens features a water-repellant optical coating, but is not safe to submerge in water or expose to heavy rain.
Designed for full-frame cameras, the Tokina AT-X 17-35mm F/4 give photographers a new wide-angle option. With a 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. of 17mm at the wide side the lens yields a spectacular 103.9 degree field of view which is great for shooting in tight situations or for taking in wide expanses of space.
This compact wide-angle zoom has a bright constant F/4 aperture make viewing and auto focus possible in lower light situations but still maintaining a reasonable size and weight.
Two Super-Low Dispersion glass elements and one aspheric glass allow the proprietary optical design to achieve excellent contrast and sharpness as well as controlling chromatic aberration.
Tokina's exclusive One-touch Focus Clutch Mechanism allows the photographer to switch between AF and MF simply by snapping the focus ring forward for AF and back toward the lens mount for manual focusing.
The mechanics have been designed for better seals around moving parts making the lens more water-resistant than lenses of the past. It has a water-repellant optical coating, but is not safe to submerge in water or expose to heavy rain. The lens is also designed to stand up to the rigors of daily use by photographers in a wide variety of shooting conditions and environments.
Full Time Manual Focus
Minimum Focus Distance
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