differences

Reasons to consider the Canon EF-S 18-135mm f/3.5-5.6 IS

More zoom 7.5x vs 5x
Help
50% more zoom, giving you more flexibility for photos
Wider aperture f/3.5 vs f/4
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At its widest, the EF-S 18-135mm f/3.5-5.6 IS captures marginally more light (0.4 f-stops)
Better telephoto 135 mm vs 85 mm
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Around 60% more reach, less perspective distortion
Slightly smaller diameter 75 mm vs 79 mm
Help
Around 10% smaller lens at the end
Canon EF-S 18-135mm f/3.5-5.6 IS Learn more about
the Canon EF-S 18-135mm f/3.5-5.6 IS

Reasons to consider the Canon EF-S 17-85mm f/4-5.6 IS USM

Slightly shorter 91 mm vs 101 mm
Help
Around 10% shorter
Canon EF-S 17-85mm f/4-5.6 IS USM Learn more about
the Canon EF-S 17-85mm f/4-5.6 IS USM

similarities

Compared to digital camera lenses

Common Strengths Common Weaknesses
Image stabilization Very good image stabilization Help
Canon IS
Zoom range Great zoom Help
EF-S 18-135mm f/3.5-5.6 IS7.5x
EF-S 17-85mm f/4-5.6 IS USM5x
Auto focus Auto focus Help
Easier to use
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses
Fixed aperture Both are variable aperture lenses Help
Narrower aperture at longer focal lengths

Compared to digital camera lenses

Common Strengths Common Weaknesses
Wide minimum Wide aperture Help
f/22
Zoom range Poor zoom Help
EF-S 18-135mm f/3.5-5.6 IS7.5x
EF-S 17-85mm f/4-5.6 IS USM5x
Max focal length Poor telephoto Help
EF-S 18-135mm f/3.5-5.6 IS135 mm
EF-S 17-85mm f/4-5.6 IS USM85 mm

competitors

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

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

$369 - $450

Aperture Wider aperture
Length Slightly shorter
Wide minimum Much wider aperture
Canon EF 28-135mm f/3.5-5.6 IS USM

Canon EF 28-135mm f/3.5-5.6 IS USM

Travel lens

$589

Zoom range Less zoom
Canon EF 70-300mm f/4-5.6 IS USM

Canon EF 70-300mm f/4-5.6 IS USM

Wildlife lens

$377 - $395

Wide minimum Significantly narrower aperture
Max focal length Better telephoto
Zoom range Less zoom

Canon EF-S 17-85mm f/4-5.6 IS USM Competitors

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

$369 - $450

Aperture Wider aperture
Length Slightly shorter
Wide minimum Much wider aperture

discussion Which do you think is better?

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