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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.

Advanced autofocus
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.

Durable L-series construction
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.

Canon EF 16-35mm
FEATURES
High-performance L-series ultra-wide-angle zoom lens with constant f2.8 maximum aperture.
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.

All-new optical design for significant improvements in outer and corner sharpness.
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.

Full-time manual focus allows manual focus adjustment while in AF Mode.
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.

Subwavelength Coating (SWC) and Air Sphere Coating (ASC) help to significantly reduce flare and ghosting.
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.

Canon EF 16-35mm
Highly resistant to dust and water intrusion, enabling shooting even in harsh conditions*.
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.

Fluorine coating on front and rear lens surfaces help reduce smears and fingerprints.
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.

Circular aperture (9 blades) helps deliver beautiful, soft backgrounds.
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. By delivering an incredible level of control over background blur, the EF 16–35mm f2.8L III USM helps you define the mood of your image, creating impactful photos and videos.

Inner focusing, ring USM, high-speed CPU and optimized AF algorithms for fast and accurate autofocusing.
The Canon EF 16 – 35mm is engineered to provide fast, accurate operation for efficient performance across the board. It features a high-performance control CPU that drives Canon’s quick inner focusing with ring USM for quick starts and stops. Plus, it’s programmed with optimized AF algorithms that help achieve fast, accurate focus and maintain it consistently.