Product comparison · 2 lenses

Canon EF 17-40mm f/4L USM vs Canon EF 400mm f/2.8L IS II USM

6specifications compared
6differ
0identical
14known for one product only

Key differences

The Canon EF 400mm f/2.8L IS II USM has 2.42 m more closest focusing distance than the Canon EF 17-40mm f/4L USM (2.7 m vs 0.28 m). The Canon EF 400mm f/2.8L IS II USM has 2 more diaphragm blades than the Canon EF 17-40mm f/4L USM (9 vs 7). The Canon EF 400mm f/2.8L IS II USM has 7.95 cm more diameter than the Canon EF 17-40mm f/4L USM (16.3 cm vs 8.35 cm). Lens structure (elements/groups): 12/9 on the Canon EF 17-40mm f/4L USM, 16/12 on the Canon EF 400mm f/2.8L IS II USM. Weight: 500 g on the Canon EF 17-40mm f/4L USM, 3.85 kg on the Canon EF 400mm f/2.8L IS II USM.

Lens structure (elements/groups)
- EF 17-40mm f/4L USM:12/9
- EF 400mm f/2.8L IS II USM:16/12
Closest focusing distance
- EF 17-40mm f/4L USM:0.28 m
- EF 400mm f/2.8L IS II USM:2.7 m
Number of diaphragm blades
- EF 17-40mm f/4L USM:7
- EF 400mm f/2.8L IS II USM:9
Diameter
- EF 17-40mm f/4L USM:8.35 cm
- EF 400mm f/2.8L IS II USM:16.3 cm
Length
- EF 17-40mm f/4L USM:96.8 mm
- EF 400mm f/2.8L IS II USM:343 mm
Weight
- EF 17-40mm f/4L USM:500 g
- EF 400mm f/2.8L IS II USM:3.85 kg

Side by side

Differences highlightedShow differences only

Comparison of EF 17-40mm f/4L USM, EF 400mm f/2.8L IS II USM
20 specifications	A Canon EF 17-40mm f/4L USM View product	B Canon EF 400mm f/2.8L IS II USM View product
Lens system3 differ
Component forKnown for one	Unknown — not stated by the source	SLR
Lens structure (elements/groups)Differs	12/9	16/12
Lens typeKnown for one	Unknown — not stated by the source	Telephoto lens
Fixed focal lengthKnown for one	Unknown — not stated by the source	400 mm
Closest focusing distanceDiffers	0.28 m	2.7 m
Maximum aperture numberKnown for one	Unknown — not stated by the source	32
Minimum aperture numberKnown for one	Unknown — not stated by the source	2.8
Number of diaphragm bladesDiffers	7	9
Image stabilizerKnown for one	Unknown — not stated by the source	Yes
Lens viewing angle, horizontalKnown for one	93°	Unknown — not stated by the source
Lens viewing angle, verticalKnown for one	70.30°	Unknown — not stated by the source
Zoom capabilityKnown for one	0.24	Unknown — not stated by the source
Performanceidentical
AF actuatorKnown for one	Unknown — not stated by the source	USM
CompatibilityKnown for one	- EOS 1000D - EOS 450D - EOS 500D - EOS 550D - EOS 60D - EOS 7D - EOS 5D Mark II - EOS-1D Mark IV - EOS-1Ds Mark III - EOS 300X - EOS 3000V	Unknown — not stated by the source
Weight & dimensions3 differ
DiameterDiffers	8.35 cm	16.3 cm
LengthDiffers	96.8 mm	343 mm
WeightDiffers	500 g	3.85 kg
Filter sizeKnown for one	77 mm	Unknown — not stated by the source
Other featuresidentical
MagnificationKnown for one	Unknown — not stated by the source	0.17x
Designidentical
Product colourKnown for one	Black	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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