differences

Reasons to consider the Tamron 17-50mm f/2.8 XR Di II LD Canon EF

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
Smaller diameter 74 mm vs 84 mm
Help
More than 10% smaller lens at the end
Slightly shorter 81 mm vs 91 mm
Help
More than 10% shorter
Slightly lighter 430 g vs 0.6 kg
Help
More than 20% lighter
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 17-50mm f/2.8 EX DC OS HSM Canon EF

Image stabilization Sigma OS vs None
Help
Helps eliminate blur caused by small camera movements
Sigma 17-50mm f/2.8 EX DC OS HSM Canon EF Learn more about
the Sigma 17-50mm f/2.8 EX DC OS HSM Canon EF

similarities

Compared to digital camera lenses

Common Strengths Common Weaknesses
Fixed aperture Constant aperture lenses Help
The same maximum aperture at all focal lengths
Auto focus Auto focus Help
Easier to use
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses

Compared to digital camera lenses

Common Strengths Common Weaknesses
Wide minimum Wide aperture Help
17-50mm f/2.8 XR Di II LD Canon EFf/32
17-50mm f/2.8 EX DC OS HSM Canon EFf/22

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

competitors

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

Canon EF-S 10-18mm f/4.5-5.6 IS STM

Canon EF-S 10-18mm f/4.5-5.6 IS STM

Wide angle lens

$265 - $279

Image stabilization Better image stabilization
Diameter Smaller diameter
Fixed aperture Has a variable aperture
Canon 18-55mm f/3.5-5.6 IS STM

Canon 18-55mm f/3.5-5.6 IS STM

Wide angle lens

$199 - $249

Image stabilization Better image stabilization
Diameter Smaller diameter
Fixed aperture Has a variable aperture
Canon EF 16-35mm f/2.8L II USM

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

Wide angle lens

$1,499

Image stabilization No image stabilization

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

Nikon Nikkor 18-105mm f/3.5-5.6G ED VR AF-S DX

Nikon Nikkor 18-105mm f/3.5-5.6G ED VR AF-S DX

Travel lens

Image stabilization Image stabilization
Zoom range More zoom
Fixed aperture Has a variable aperture
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

$329 - $499

Image stabilization Image stabilization
Zoom range More zoom
Wide minimum Much wider aperture
Canon EF 24-70mm f/2.8L II USM

Canon EF 24-70mm f/2.8L II USM

Wide angle lens

$1,750 - $1,799

Max focal length Slightly better telephoto
Wide minimum Significantly wider aperture

discussion Which do you think is better?

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