Canon Lens EF 16-35 F/2.8L III USM

Characterized by a revamped optical configuration, the EF 16-35mm f/2.8L III USM from Canon is a workhorse wide-angle zoom and member of the well-regarded L-series of lenses.
Built around a range of specialized elements, this lens utilizes a trio of aspherical elements and two ultra-low dispersion glass elements to control a selection of aberrations for elevated sharpness and definition.
Both SWC and ASC coatings deliver additionally been applied to the elements in order to lower lens flare and ghosting for increased contrast and colour accuracy.
Complementing the lens's optical performance, a ring-type Ultrasonic Motor supplies fast, smooth, and quiet autofocus performance, which is additional benefitted by continuous manual focus operation and an onboard focusing configuration.
the lens is both water and dust-resistant, and fluorine coatings deliver additionally been applied to the front and rear elements to safeguard against fingerprints and smudges from affecting picture quality.
Wide-angle zoom 16-35mm lens is compatible with full-frame Canon EF-mount DSLRs, as well as APS-C-sized versions where it will deliver a 25.6-56mm equivalent focal-length range.
Constant f/2.8 maximum aperture includes consistent performance and strong light transmission across the zoom selection.
Two large-diameter glass-molded dual-surface aspherical elements and one terrain aspherical component help to minimize distortions and spherical aberrations across the zoom range in order to preserve edge-to-edge sharpness and illumination.
Two ultra-low dispersion elements are employed to minimize chromatic aberrations as well as eliminate colour blurring around the edges of people or objects.
Both a Subwavelength Surface treatment (SWC) and an Air Sphere Surface treatment (ASC) deliver been applied to lens elements to lower backlit flaring and ghosting for maintained light transmission and elevated contrast in strong lighting situations.
A ring-type Ultrasonic Motor (USM), along with an onboard focusing arrangement, high-speed CPU, and optimized AF algorithms, are employed to produce fast, accurate, and quiet autofocus performance as well as continuous manual focus override.
As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental situations.
Protective fluorine surface treatment has been applied to the front bulbous component to resist fingerprints and smudges and to make cleaning materially easier.
Curved nine-blade diaphragm contributes to a pleasing out of focus quality that assists the use of shallow depth-of-field and selective focus techniques.
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