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Black cylindrical Canon L-series ultra-wide zoom lens with red ring, 82mm filter thread, weather-sealed barrel

Canon

Canon 0573C002 EF 16-35mm f/2.8L III USM camera lens

SKU CH-GT1F-CMSMN MPN 0573C002

Ultra-wide zoom with constant f/2.8 aperture, 16 elements in 11 groups, fluorine and water-resistant construction

  • Part type or number0573C002
  • Diameter88.5 mm
  • Focus systemAF with full-time manual
  • Lens focal length16–35 mm
  • Lens apertureMaximum: f/2.8 Minimum: f/22
  • Viewing angle108 degree 10'
  • Constant f/2.8 aperture maintains exposure across 16–35 mm zoom
  • 16 elements in 11 groups with three aspherical and two UD lenses sharpen corners
  • Subwavelength and Air Sphere coatings cut flare and ghosting in backlit scenes
  • Ring-type USM delivers fast AF with full-time manual focus override
  • Dust- and water-resistant build plus fluorine coating protects front and rear elements

Wide-angle zoom for full-frame EF

The Canon EF 16-35mm f/2.8L III USM is a professional L-series ultra-wide zoom with a constant f/2.8 aperture. It covers focal lengths from 16 to 35 mm and delivers a diagonal angle of view up to 108 degrees. The lens uses 16 elements in 11 groups including three aspherical and two UD elements. A ring-type ultrasonic motor provides fast autofocus with full-time manual override.

Upgrading from variable-aperture zooms

This lens replaces slower ultra-wide zooms that lose aperture at longer focal lengths. The constant f/2.8 maximum aperture is worth the jump for interior, event and landscape work where lighting cannot be controlled. Subwavelength and Air Sphere coatings reduce flare and ghosting more effectively than older designs. Fluorine coating on exposed elements eases cleaning in harsh environments.

Suits professionals needing weather-sealed f/2.8

Photographers who require dust- and water-resistant construction with internal focus will benefit from this build. The 82 mm filter thread and 88.5 mm diameter accept standard professional filters. Buyers needing a lighter walk-around lens or a wider maximum aperture than f/2.8 should look at alternative options. APS-C shooters seeking equivalent wide coverage may prefer a dedicated crop-sensor zoom.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $1,681.99
Pricier than about 90% of the 2,570 comparable items (median $546.49).

Specifications

Product
Brand nameCanon
Model nameEF
Part type or number0573C002
Product typeUltra Wide Angle Zoom
Product colorBlack
Audio & video
Focus systemAF with full-time manual
Lens focal length16–35 mm
Lens apertureMaximum: f/2.8 Minimum: f/22
Viewing angle108 degree 10'
Closest focusing distance0.92 ft (0.28 m)
Optical construction16 elements in 11 groups
Size & build
Diameter88.5 mm
Filter thread size82 mm
Product dimensions3.5 in × 3.5 in × 5 in
Product weight1.74 lb (0.79 kg)
Shipping weight0.91 kg
Package size235 × 136 × 136 mm

Questions about this item

What filter thread size does the 88.5 mm diameter lens accept?

The lens has an 82 mm filter thread for attaching circular filters directly to the front element.

How is the ring-type ultrasonic motor engaged for autofocus, and what step is often missed?

Set the focus mode switch to AF; the ring-type ultrasonic motor then drives internal focusing, and full-time manual override is available by turning the focus ring without changing the switch.

When should the fluorine coating on the exposed front and rear elements be cleaned?

Clean the fluorine-coated surfaces only when visible smudges or dust affect image quality, using a blower first and then a lens cloth with approved cleaning fluid.

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