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Canon EF 16–35mm f/2.8L III USM vs Canon EF-S 10–18mm f/4.5–5.6 IS STM

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

CanonEF 16–35mm f/2.8L III USMCanonEF-S 10–18mm f/4.5–5.6 IS STM
Overview
ReleasedOctober 2016May 2014
Optics
Lens typeZoomZoom
Focal length16–35 mm10–18 mm
Maximum aperturef/2.8f/4.5–5.6
Minimum aperturef/22f/22–29
Optical constructionSixteen elements in eleven groups14 elements in 11 groups
Special elementsTwo large-diameter glass-moulded aspherical elements, one ground aspherical element and two UD elementsOne UD and two aspherical elements, including a large-diameter plastic-moulded aspherical element
CoatingsAir Sphere Coating and Subwavelength Structure Coating; front and rear fluorine coatings according to The Digital PictureSuper Spectra coating
Aperture detail–Minimum f/22–29 in one-third-stop increments; f/22–27 with half-stop increments
DiaphragmNine circular bladesSeven blades with a circular aperture
Angle of viewHorizontal 98°–54°; vertical 74°10′–38°; diagonal 108°10′–63°–
Mount and compatibility
MountsCanon EFCanon EF-S
Image circleFull frameAPS-C
CompatibilityFull-frame and APS-C Canon EF DSLRsCanon EF-S mount APS-C cameras
Teleconverter supportExtenders cannot be used; the manual also states that no compatible close-up lenses are available–
Adaptor supportCanon UK lists EOS M use with the EF-EOS M mount adaptor–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.28 m0.22 m
Maximum magnification0.25×0.15×
Optical stabilisationNoYes
Autofocus detailRing USM with full-time manual override; keep the shutter half-pressed after autofocus when adjusting focus manuallyStepping motor for smooth, near-silent focusing
Focus distance detail–Electronic focus ring; no distance scale (Digital Camera World); front element does not rotate during focusing (OpticalLimits)
Magnification detailAt 35 mm, EF12 II gives 0.65×–0.36× and EF25 II gives 1.14×–0.80×; both tubes are incompatible at 16 mmMaximum 0.15× at 18 mm
Stabilisation detail–Approximately four shutter-speed stops under CIPA standards, tested on an EOS 7D at 18 mm
Design
Dust and moisture resistantYes–
Filter diameter82 mm67 mm
Maximum diameter88.5 mm74.6 mm
Length127.5 mm72 mm
Weight790 g240 g
ControlsSeparate zoom and focus rings, AF/MF switch and distance window–
Zoom designConstant outer length with inner front-tube movement according to both reviews; the manual advises zooming before focusingLens extends slightly towards both ends of the zoom range; shortest around 14 mm (OpticalLimits)
Filter detailOne front filter may be fitted; the manual specifies the 82 mm Canon PL-C B polariser and removing the hood for adjustment–
Weather resistanceSealed construction and rubber mount ring; the manual recommends an 82 mm Canon PROTECT filter for best dust and water resistance–
Dimensions detailLength measured from the mount surface to the front; front and rear caps add 24 mm74.6 mm maximum diameter × 72 mm length in the retracted state
Weight detailApproximately 790 g for the lens alone, excluding accessories, in Canon's instruction manual–
Lens hoodReversible EW-88D hood with release buttonOptional EW-73C (Digital Camera World and OpticalLimits)
In the boxLens, EW-88D hood, LP1222 case, E-82 II front cap, rear cap E and user manualLens, E-67II front cap, rear Lens Cap E and user manual
Release detailCanon Camera Museum records October 2016 marketing; no first-sale day is statedMarketed in May 2014 according to Canon Camera Museum

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