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Looking to take things up a notch, Canon EF 16 - 35mm f2.8L III USM Lens embraces a revamped optical design with modern coating technologies that promise improved outer and corner sharpness along with minimal distortion and enhanced peripheral illumination.
A member of Canon's legendary L series, this full-frame 16-35mm delivers outstanding image quality and a professional-grade durability. It also offers a fast and constant f2.8 maximum aperture for consistent performance and light transmission throughout the zoom range.
EF 16-35mm f/2.8L III USM features a ring-type USM motor and high-performance CPU, which work to ensure faster focusing.
With the incorporation of two large diameter GMO dual surface aspherical elements and one ground aspherical element, the lens will minimize distortions throughout the zoom range as well as maintain edge-to-edge sharpness and illumination.
Along with those elements, the lens utilizes two Ultra-low Dispersion glass elements that minimize chromatic aberrations. Also, it uses both a Subwavelength Coating and an Air Sphere Coating to minimize flare and ghosting.
The robust, durable, weather-sealed construction of EF 16-35mm f2.8L III USM helps it to withstand the rigors of professional use.
In terms of handling, the Canon EF 16 - 35mm uses a ring-type USM focusing motor combined with a high-speed CPU and optimized algorithms for lightning-fast and accurate autofocus.
The lens has an internal focus design and offers full-time manual focus override so users can make tweaks using the physical focusing ring regardless of mode. Along with all of this, the aperture diaphragm uses nine rounded blades to create a smooth bokeh.
For professional use, the lens is dust- and water-resistant, using seals throughout to prevent intrusion of particles, especially when shooting in inclement weather. Additionally, it uses a fluorine coating on the exposed front and rear elements to reduce smears and make cleaning easier.
The Canon EF 16 - 35mm has a bright constant maximum aperture of f2.8, which provides superb control over depth of field and the ability to maintain the same aperture throughout the zoom range.
This is particularly helpful when shooting outdoors at dusk or in inclement weather, or indoors in dimly lit rooms. At f2.8, the EF 16—35mm f2.8L III USM offers a bright view when composing images using the camera's viewfinder.
The EF 16—35mm f2.8L III USM features a new optical design engineered to deliver images of remarkable clarity and depth — a magnificent complement to the large, high-resolution sensors in the SLRs favoured by today's advanced photographers. It employs two large-diameter double-surface GMo lenses plus a ground aspherical lens to help decrease distortion, a curvature of field and astigmatism.
Two UD lenses help to reduce chromatic aberration, leading to precise colour rendition, accurate edge-to-edge detail plus excellent contrast throughout the lens's zoom range. This means sharp landscapes, reduced distortion in the edges of the frame and an overall improvement in image quality no matter the subject.
The EF 16—35mm f2.8L III USM offers complete manual control, even when AF is engaged, with a simple twist of the lens's focus ring. Additionally, full-time manual focus means it's easy to achieve and maintain focus manually, which can be especially handy when shooting video or composing still images on an SLR's screen.
The EF 16—35mm f2.8L III USM features both Subwavelength Coatings (SWC) and Air Sphere Coatings (ASC) on its lens elements to help combat reflections, flare and ghosting, and deliver clean images with reduced aberrations from reflected light. Subwavelength Coatings help prevent reflections by arranging an array of wedge-shaped nanostructures on the lens's surface that are smaller than the wavelength of visible light and are able to help control reflection and flare.
Air Sphere Coating technology puts an ultra-low refractive layer on the lens element designed to significantly reduce both flare and ghosting. These coatings, in concert with the EF 16—35mm f2.8L III USM's overall optical formula, help to deliver a clean image to the camera's sensor, which can decrease the need for post-production.
Befitting an L-series lens, the EF 16—35mm f2.8L III USM is built to endure photography and moviemaking in even the harshest conditions*. It features a dust- and water-resistant construction on the switch panel, the zoom and focus rings, and on the lens mount, helping to prevent dust and moisture from interfering with operation. When outfitted with a Canon filter, the EF 16—35mm f2.8L III USM is supremely dust- and water-resistant.
* Full weather-resistance for the front section of the lens requires attaching optional Canon PROTECT filter.
To help maintain a clean lens, even after multiple lens changes in sub-optimal conditions, the EF 16—35mm f2.8L III USM has a specially designed non-stick fluorine coating on its front and rear surfaces. This fluorine coating helps prevent dust, water, oil and another surface residue like fingerprints from sticking to the lens, resulting in quick and easy wiping, without the use of solvents.
Thanks to its 9-blade, circular aperture, the EF 16—35mm f2.8L III USM is capable of gorgeous, evocative out-of-focus areas and soft backgrounds throughout its zoom range. Its f2.8 maximum aperture enables shallow depth of field, which is often difficult to achieve with ultra-wide-angle lenses and lenses with small maximum apertures. ...