Canon EF 16-35mm f/2.8L III USM Lens Overview
Canon EF 16-35mm f/2.8L III USM Lens is a workhorse wide-angle zoom and member of the well-regarded L-series of lenses. Featuring a series of specialized elements, this lens utilizes a trio of aspherical elements and two ultra-low dispersion glass elements to control a variety of aberrations for high sharpness and clarity. Both SWC and ASC coatings have also been applied to the elements in order to reduce lens flare and ghosting for increased contrast and color accuracy.
Complementing its optical prowess, a ring-type Ultrasonic Motor offers fast, smooth, and near-silent autofocus performance, which is further benefitted by full-time manual focus operation and an internal focusing design. The lens is both water and dust-resistant, and fluorine coatings have also been applied to the front and rear elements to protect against fingerprints and smudges from affecting image quality.
Features
Wide-angle zoom 16-35mm lens is compatible with full-frame Canon EF-mount DSLRs, as well as APS-C-sized models where it will provide a 25.6-56mm equivalent focal length range.
Constant f/2.8 maximum aperture offers consistent performance and excellent light transmission throughout the zoom range.
Two large-diameter glass-molded dual-surface aspherical elements and one ground aspherical element help to minimize distortions and spherical aberrations throughout the zoom range in order to maintain edge-to-edge sharpness and illumination.
Two ultra-low dispersion elements are used to minimize chromatic aberrations as well as eliminate color blurring around the edges of subjects.
Both a Subwavelength Coating (SWC) and an Air Sphere Coating (ASC) have been applied to lens elements to reduce backlit flaring and ghosting for maintained light transmission and high contrast in strong lighting conditions.
A ring-type Ultrasonic Motor (USM), along with an internal focusing system, high-speed CPU, and optimized AF algorithms,.
As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.
Rounded nine-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.
Canon EF 16-35mm F/2.8L III USM Specs
Focal Length |
16 to 35mm
|
Maximum Aperture |
f/2.8
|
Lens Mount |
Canon EF
|
Lens Format Coverage |
Full-Frame
|
Focus Type |
Autofocus
|
Image Stabilization |
No
|
Filter Size |
82 mm (Front)
|
Maximum Aperture |
f/2.8
|
Minimum Aperture |
f/22
|
Lens Mount |
Canon EF
|
Lens Format Coverage |
Full-Frame
|
Angle of View |
108° 10′ to 63°
|
Minimum Focus Distance |
11.02″ / 28 cm
|
Maximum Magnification |
0.22x
|
Optical Design |
16 Elements in 11 Groups
|
Diaphragm Blades |
9, Rounded
|
Focus Type |
Autofocus
|
Image Stabilization |
No
|
Filter Size |
82 mm (Front)
|
Dimensions (ø x L) |
3.48 x 5.02″ / 88.5 x 127.5 mm
|
Length at Maximum Extension |
5.04″ / 128 mm
|
Weight |
1.74 lb / 790 g
|
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