Sigma
18-50mm f/2.8-4.5 DC OS HSM Canon-ef
 vs
Canon
EF 17-40mm f/4L USM

vs

differences

Reasons to consider the Sigma 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Image stabilization Sigma OS vs None
Help
 Helps eliminate blur caused by small camera movements
Wider aperture f/2.8 vs f/4
Help
 At its widest, the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef captures slightly more light, 1 f-stop
Slightly cheaper $199.00 vs $739.00
Help
 The best price we've seen is $540 cheaper (3.7x less)
Slightly more zoom 2.8x vs 2.4x
Help
 Around 20% more zoom, giving you more flexibility for photos
Sigma 18-50mm f/2.8-4.5 DC OS HSM Canon-ef Learn more about
the Sigma 18-50mm f/2.8-4.5 DC OS 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
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
18-50mm f/2.8-4.5 DC OS 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
Max focal length Poor telephoto Help
18-50mm f/2.8-4.5 DC OS HSM Canon-ef:50 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.

LensHero is not aware of any interesting weaknesses shared by these two products.

competitors

Shared Competitors

Advantages

Disadvantages
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
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 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Compare the 17-50mm f/2.8 XR Di II LD Canon-ef 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 Has better image stabilization
Compare the EF-S 17-55mm f/2.8 IS USM vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Compare the EF-S 17-55mm f/2.8 IS USM vs the EF 17-40mm f/4L USM
Canon EF 50mm f/1.8 II

Canon EF 50mm f/1.8 II

Low light lens

$98 - $125
Aperture Has a wider aperture
Length Is shorter
Focus motor Lacks a silent focus motor
Compare the EF 50mm f/1.8 II vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Compare the EF 50mm f/1.8 II vs the EF 17-40mm f/4L USM
Canon EF-S 18-135mm f/3.5-5.6 IS

Canon EF-S 18-135mm f/3.5-5.6 IS

Travel lens

$499 - $549
Max focal length Has a slightly shorter telephoto lens
Image stabilization Has better image stabilization
Aperture Has a narrower aperture
Focus motor Lacks a silent focus motor
Compare the EF-S 18-135mm f/3.5-5.6 IS vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Compare the EF-S 18-135mm f/3.5-5.6 IS vs the EF 17-40mm f/4L USM
Tamron 28-75mm f/2.8 XR Di Canon-ef

Tamron 28-75mm f/2.8 XR Di Canon-ef

Wide angle lens

$499
Wide maximum Has a higher max f/stop
Focus motor Lacks a silent focus motor
Compare the 28-75mm f/2.8 XR Di Canon-ef vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Compare the 28-75mm f/2.8 XR Di Canon-ef vs the EF 17-40mm f/4L USM

Sigma 18-50mm f/2.8-4.5 DC OS HSM Canon-ef Competitors

Advantages

Disadvantages
Canon EF-S 18-55mm f/3.5-5.6 IS

Canon EF-S 18-55mm f/3.5-5.6 IS

Wide angle lens

$185 - $199
Image stabilization Better image stabilization
Magnification More magnification
Focus motor Doesn't have a silent focus motor
Aperture Narrower aperture
Compare the EF-S 18-55mm f/3.5-5.6 IS vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Sigma 10-20mm f/4-5.6 EX DC HSM Canon-ef

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

Wide angle lens

$479
Image stabilization No image stabilization
Aperture Narrower aperture
Compare the 10-20mm f/4-5.6 EX DC HSM Canon-ef vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Sigma 17-70mm f/2.8-4 DC Macro OS HSM Canon-ef

Sigma 17-70mm f/2.8-4 DC Macro OS HSM Canon-ef

Wide angle lens

$499
Zoom range More zoom
Max focal length Slightly better telephoto
Lowest price Slightly more expensive
Compare the 17-70mm f/2.8-4 DC Macro OS HSM Canon-ef vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Sigma 17-50mm f/2.8 EX DC OS HSM Canon-ef

Sigma 17-50mm f/2.8 EX DC OS HSM Canon-ef

Wide angle lens

$594
Fixed aperture Has a consant aperture
Lowest price Slightly more expensive
Weight Slightly heavier
Compare the 17-50mm f/2.8 EX DC OS HSM Canon-ef vs the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef
Sigma 28-300mm f/3.5-6.3 DG IF Macro Canon-ef

Sigma 28-300mm f/3.5-6.3 DG IF Macro Canon-ef

Travel lens

$299
Zoom range Much more zoom
Max focal length Significantly better telephoto
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 28-300mm f/3.5-6.3 DG IF Macro Canon-ef vs the 18-50mm f/2.8-4.5 DC OS 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

$1,467 - $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-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 Narrower aperture
Aperture Wider aperture
Fixed aperture Has a variable aperture
Magnification Less magnification
Compare the EF-S 10-22mm f/3.5-4.5 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 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 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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