Tamron
17-50mm f/2.8 XR Di II LD Canon-ef
 vs
Sigma
18-50mm f/2.8-4.5 DC OS HSM

vs

differences

Reasons to consider the Tamron 17-50mm f/2.8 XR Di II LD Canon-ef
Has a consant aperture Yes vs No
Help
 Constant aperture lenses offer the same aperture at all focal lengths
Significantly narrower aperture f/32 vs f/22
Help
 At its narrowest, the 17-50mm f/2.8 XR Di II LD Canon-ef goes 1.1 f-stops narrower
Tamron 17-50mm f/2.8 XR Di II LD Canon-ef Learn more about
the Tamron 17-50mm f/2.8 XR Di II LD Canon-ef

Reasons to consider the Sigma 18-50mm f/2.8-4.5 DC OS HSM
Has a silent focus motor Sigma HSM vs None
Help
 Focuses quickly and silently
Image stabilization Sigma OS vs None
Help
 Helps eliminate blur caused by small camera movements
Slightly cheaper $199.00 vs $459.00
Help
 The best price we've seen is $260 cheaper (2.3x less)
Sigma 18-50mm f/2.8-4.5 DC OS HSM Learn more about
the Sigma 18-50mm f/2.8-4.5 DC OS HSM

similarities

Compared to lenses

Common Strengths Common Weaknesses

LensHero is not aware of any interesting strengths shared by these two products.
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses
Max focal length Poor telephoto Help
50 mm

Compared to portrait 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
Canon EF 17-40mm f/4L USM

Canon EF 17-40mm f/4L USM

Wide angle lens

$739
Aperture Has a narrower aperture
Compare the EF 17-40mm f/4L USM vs the 17-50mm f/2.8 XR Di II LD Canon-ef
Compare the EF 17-40mm f/4L USM vs the 18-50mm f/2.8-4.5 DC OS HSM
Sigma 18-50mm f/2.8-4.5 DC OS HSM Canon-ef

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

Wide angle lens

$199
Compare the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef vs the 17-50mm f/2.8 XR Di II LD Canon-ef
Compare the 18-50mm f/2.8-4.5 DC OS HSM Canon-ef vs the 18-50mm f/2.8-4.5 DC OS HSM
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 Has better image stabilization
Aperture Has a narrower aperture
Compare the EF-S 18-55mm f/3.5-5.6 IS vs the 17-50mm f/2.8 XR Di II LD Canon-ef
Compare the EF-S 18-55mm f/3.5-5.6 IS vs the 18-50mm f/2.8-4.5 DC OS HSM
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
Compare the 17-70mm f/2.8-4 DC Macro OS HSM Canon-ef vs the 17-50mm f/2.8 XR Di II LD Canon-ef
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 50mm f/1.8 II

Canon EF 50mm f/1.8 II

Low light lens

$98 - $125
Aperture Has a wider aperture
Prime lens Is a fixed focal length prime lens
Zoom range Has slightly smaller zoom range
Compare the EF 50mm f/1.8 II vs the 17-50mm f/2.8 XR Di II LD Canon-ef
Compare the EF 50mm f/1.8 II vs the 18-50mm f/2.8-4.5 DC OS HSM
Tamron SP 17-50mm f/2.8 XR Di-II VC LD Canon-ef

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

Wide angle lens

$499
Compare the SP 17-50mm f/2.8 XR Di-II VC LD Canon-ef vs the 17-50mm f/2.8 XR Di II LD Canon-ef
Compare the SP 17-50mm f/2.8 XR Di-II VC LD Canon-ef vs the 18-50mm f/2.8-4.5 DC OS HSM
Tamron SP 17-50mm f/2.8 XR Di-II VC LD Nikon-f

Tamron SP 17-50mm f/2.8 XR Di-II VC LD Nikon-f

Wide angle lens

$649
Compare the SP 17-50mm f/2.8 XR Di-II VC LD Nikon-f vs the 17-50mm f/2.8 XR Di II LD Canon-ef
Compare the SP 17-50mm f/2.8 XR Di-II VC LD Nikon-f vs the 18-50mm f/2.8-4.5 DC OS HSM

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

Advantages

Disadvantages
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
Focus motor Has a silent focus motor
Image stabilization Image stabilization
Wide maximum Significantly wider aperture
Weight Slightly heavier
Compare the 17-50mm f/2.8 EX DC OS HSM Canon-ef vs the 17-50mm f/2.8 XR Di II LD Canon-ef
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
Focus motor Has a silent focus motor
Lowest price More expensive
Zoom range Slightly less zoom
Compare the EF 16-35mm f/2.8L II USM vs the 17-50mm f/2.8 XR Di II LD Canon-ef
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
Focus motor Has a silent focus motor
Wide maximum Significantly wider aperture
Length Longer
Compare the EF-S 17-55mm f/2.8 IS USM vs the 17-50mm f/2.8 XR Di II LD Canon-ef

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

Advantages

Disadvantages
Samsung 16mm f/2.4 Pancake

Samsung 16mm f/2.4 Pancake

Low light lens

$300
Prime lens Is a prime lens
Aperture Wider aperture
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 16mm f/2.4 Pancake vs the 18-50mm f/2.8-4.5 DC OS HSM
Sony 50mm f/1.8 DT

Sony 50mm f/1.8 DT

Low light lens

$168
Prime lens Is a prime lens
Aperture Wider aperture
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 50mm f/1.8 DT vs the 18-50mm f/2.8-4.5 DC OS HSM
Nikon Nikkor 20mm f/2.8D

Nikon Nikkor 20mm f/2.8D

Wide angle lens

$529
Prime lens Is a prime lens
Weight Slightly lighter
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the Nikkor 20mm f/2.8D vs the 18-50mm f/2.8-4.5 DC OS HSM
Olympus Zuiko 12-60mm f/2.8-4 ED SWD

Olympus Zuiko 12-60mm f/2.8-4 ED SWD

Wide angle lens

$999
Zoom range More zoom
Magnification Slightly more magnification
Image stabilization No image stabilization
Lowest price More expensive
Compare the Zuiko 12-60mm f/2.8-4 ED SWD vs the 18-50mm f/2.8-4.5 DC OS HSM

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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