Sigma
10-20mm f/4-5.6 EX DC HSM Canon-ef
 vs
Canon
EF 17-40mm f/4L USM

vs

differences

Reasons to consider the Sigma 10-20mm f/4-5.6 EX DC HSM Canon-ef
Slightly shorter 81 mm vs 97 mm
Help
 Around 20% shorter
Slightly cheaper $479.00 vs $739.00
Help
 The best price we've seen is $260 cheaper (around 40% less)
Sigma 10-20mm f/4-5.6 EX DC HSM Canon-ef Learn more about
the Sigma 10-20mm f/4-5.6 EX DC HSM Canon-ef

Reasons to consider the Canon EF 17-40mm f/4L USM
Has a consant aperture Yes vs No
Help
 Constant aperture lenses offer the same aperture at all focal lengths
More magnification 1:4 (0.2x) vs 1:6.7 (0.1x)
Help
 Take macro shots with subjects around 70% larger in your photo
Slightly better telephoto 40 mm vs 20 mm
Help
 2x more reach, less perspective distortion
Slightly more zoom 2.4x vs 2x
Help
 Around 20% more zoom, giving you more flexibility for photos
Canon EF 17-40mm f/4L USM Learn more about
the Canon EF 17-40mm f/4L USM

similarities

Compared to lenses

Common Strengths Common Weaknesses
Focus motor Silent focus motor Help
10-20mm f/4-5.6 EX DC HSM Canon-ef:Sigma HSM
EF 17-40mm f/4L USM:Canon USM
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses
Aperture Very narrow widest aperture size Help
f/4
Max focal length Poor telephoto Help
10-20mm f/4-5.6 EX DC HSM Canon-ef:20 mm
EF 17-40mm f/4L USM:40 mm

Compared to wide angle lenses

Common Strengths Common Weaknesses

LensHero is not aware of any interesting strengths shared by these two products.
Zoom range Poor zoom Help
10-20mm f/4-5.6 EX DC HSM Canon-ef:2x
EF 17-40mm f/4L USM:2.4x
Image stabilization No image stabilization Help
Risk of blur

competitors

Shared Competitors

Advantages

Disadvantages
Canon EF-S 10-22mm f/3.5-4.5 USM

Canon EF-S 10-22mm f/3.5-4.5 USM

Wide angle lens

$759
Wide maximum Has a higher max f/stop
Compare the EF-S 10-22mm f/3.5-4.5 USM vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Compare the EF-S 10-22mm f/3.5-4.5 USM vs the EF 17-40mm f/4L USM
Tamron 17-50mm f/2.8 XR Di II LD Canon-ef

Tamron 17-50mm f/2.8 XR Di II LD Canon-ef

Wide angle lens

$459
Aperture Has a wider aperture
Wide maximum Has a higher max f/stop
Focus motor Lacks a silent focus motor
Compare the 17-50mm f/2.8 XR Di II LD Canon-ef vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Compare the 17-50mm f/2.8 XR Di II LD Canon-ef vs the EF 17-40mm f/4L USM
Tokina 11-16mm f/2.8 AT-X 116 Pro DX Canon-ef

Tokina 11-16mm f/2.8 AT-X 116 Pro DX Canon-ef

Wide angle lens

$599
Aperture Has a wider aperture
Focus motor Lacks a silent focus motor
Compare the 11-16mm f/2.8 AT-X 116 Pro DX Canon-ef vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Compare the 11-16mm f/2.8 AT-X 116 Pro DX Canon-ef vs the EF 17-40mm f/4L USM
Sigma 12-24mm f/4.5-5.6 Canon-ef

Sigma 12-24mm f/4.5-5.6 Canon-ef

Wide angle lens

$859
Focus motor Lacks a silent focus motor
Compare the 12-24mm f/4.5-5.6 Canon-ef vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Compare the 12-24mm f/4.5-5.6 Canon-ef vs the EF 17-40mm f/4L USM

Sigma 10-20mm f/4-5.6 EX DC HSM Canon-ef Competitors

Advantages

Disadvantages
Tamron SP 10-24mm f/3.5-4.5 DI II Canon-ef

Tamron SP 10-24mm f/3.5-4.5 DI II Canon-ef

Wide angle lens

$499
Aperture Wider aperture
Magnification Slightly more magnification
Wide maximum Much wider aperture
Focus motor Doesn't have a silent focus motor
Compare the SP 10-24mm f/3.5-4.5 DI II Canon-ef vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Tamron 18-270mm f/3.5-6.3 Di-II VC LD Macro Nikon-f

Tamron 18-270mm f/3.5-6.3 Di-II VC LD Macro Nikon-f

Travel lens

$400
Zoom range Much more zoom
Image stabilization Image stabilization
Focus motor Doesn't have a silent focus motor
Length Slightly longer
Compare the 18-270mm f/3.5-6.3 Di-II VC LD Macro Nikon-f vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Sigma 8-16mm f/4.5-5.6 DC HSM Canon-ef

Sigma 8-16mm f/4.5-5.6 DC HSM Canon-ef

Wide angle lens

$649
Aperture Narrower aperture
Compare the 8-16mm f/4.5-5.6 DC HSM Canon-ef vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Sigma 24mm f/1.8 EX DG DF Macro Pentax-k

Sigma 24mm f/1.8 EX DG DF Macro Pentax-k

Low light lens

$449
Aperture Much wider aperture
Prime lens Is a prime lens
Focus motor Doesn't have a silent focus motor
Zoom range Less zoom
Compare the 24mm f/1.8 EX DG DF Macro Pentax-k vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef
Sigma 18-50mm f/2.8 EX DC HSM Macro Nikon-f

Sigma 18-50mm f/2.8 EX DC HSM Macro Nikon-f

Wide angle lens

$379
Fixed aperture Has a consant aperture
Aperture Wider aperture
Compare the 18-50mm f/2.8 EX DC HSM Macro Nikon-f vs the 10-20mm f/4-5.6 EX DC HSM Canon-ef

Canon EF 17-40mm f/4L USM Competitors

Advantages

Disadvantages
Canon EF 16-35mm f/2.8L II USM

Canon EF 16-35mm f/2.8L II USM

Fisheye lens

$1,499 - $1,699
Fisheye Fisheye lens
Aperture Wider aperture
Lowest price More expensive
Magnification Slightly less magnification
Compare the EF 16-35mm f/2.8L II USM vs the EF 17-40mm f/4L USM
Canon EF 24-70mm f/2.8L USM

Canon EF 24-70mm f/2.8L USM

Wide angle lens

$1,280
Aperture Wider aperture
Max focal length Slightly better telephoto
Weight Heavier
Length Slightly longer
Compare the EF 24-70mm f/2.8L USM vs the EF 17-40mm f/4L USM
Canon EF 24-105mm f/4L IS USM

Canon EF 24-105mm f/4L IS USM

Wide angle lens

$1,149
Image stabilization Image stabilization
Zoom range More zoom
Lowest price Slightly more expensive
Weight Slightly heavier
Compare the EF 24-105mm f/4L IS USM vs the EF 17-40mm f/4L USM
Canon EF-S 17-55mm f/2.8 IS USM

Canon EF-S 17-55mm f/2.8 IS USM

Wide angle lens

$1,059
Image stabilization Image stabilization
Aperture Wider aperture
Magnification Less magnification
Length Slightly longer
Compare the EF-S 17-55mm f/2.8 IS USM vs the EF 17-40mm f/4L USM
Canon 24-105mm f/4L IS USM

Canon 24-105mm f/4L IS USM

Wide angle lens

$1,059
Image stabilization Image stabilization
Zoom range More zoom
Weight Slightly heavier
Lowest price Slightly more expensive
Compare the 24-105mm f/4L IS USM vs the EF 17-40mm f/4L USM

discussion Which do you think is better?

Speech is free, but discussion at LensHero is moderated! Please discuss your opinion of these lenses here, and discuss feedback for LensHero at our support community.

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