Sigma
10-20mm f/3.5 EX DC HSM Canon-ef
 vs
Olympus Zuiko
9-18mm f/4-5.6 ED

vs

differences

Reasons to consider the Sigma 10-20mm f/3.5 EX DC HSM Canon-ef
Has a consant aperture Yes vs No
Help
 Constant aperture lenses offer the same aperture at all focal lengths
Has a silent focus motor Sigma HSM vs None
Help
 Focuses quickly and silently
Wider aperture f/3.5 vs f/4
Help
 At its widest, the 10-20mm f/3.5 EX DC HSM Canon-ef captures marginally more light, 0.4 f-stops
Slightly more magnification 1:6.6 (0.2x) vs 1:8 (0.1x)
Help
 Take macro shots with subjects more than 20% larger in your photo
Sigma 10-20mm f/3.5 EX DC HSM Canon-ef Learn more about
the Sigma 10-20mm f/3.5 EX DC HSM Canon-ef

Reasons to consider the Olympus 9-18mm f/4-5.6 ED

Much narrower aperture f/22 vs f/3.5
Help
 At its narrowest, the 9-18mm f/4-5.6 ED goes 5.3 f-stops narrower
Slightly lighter 275 g vs 0.5 kg
Help
 Around 50% lighter
Olympus Zuiko 9-18mm f/4-5.6 ED Learn more about
the Olympus 9-18mm f/4-5.6 ED

similarities

Compared to lenses

Common Strengths Common Weaknesses
Min focal length Good wide-angle Help
10-20mm f/3.5 EX DC HSM Canon-ef:10 mm
9-18mm f/4-5.6 ED :9 mm
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses
Max focal length Poor telephoto Help
10-20mm f/3.5 EX DC HSM Canon-ef:20 mm
9-18mm f/4-5.6 ED :18 mm
Magnification Poor magnification Help
10-20mm f/3.5 EX DC HSM Canon-ef:1:6.6 (0.2x)
9-18mm f/4-5.6 ED :1:8 (0.1x)

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
2x
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/3.5 EX DC HSM Canon-ef
Compare the EF-S 10-22mm f/3.5-4.5 USM vs the Zuiko 9-18mm f/4-5.6 ED
Tamron SP 10-24mm f/3.5-4.5 DI II Pentax-k

Tamron SP 10-24mm f/3.5-4.5 DI II Pentax-k

Wide angle lens

$474
Compare the SP 10-24mm f/3.5-4.5 DI II Pentax-k vs the 10-20mm f/3.5 EX DC HSM Canon-ef
Compare the SP 10-24mm f/3.5-4.5 DI II Pentax-k vs the Zuiko 9-18mm f/4-5.6 ED
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 Has a narrower aperture
Compare the 8-16mm f/4.5-5.6 DC HSM Canon-ef vs the 10-20mm f/3.5 EX DC HSM Canon-ef
Compare the 8-16mm f/4.5-5.6 DC HSM Canon-ef vs the Zuiko 9-18mm f/4-5.6 ED
Canon EF 17-40mm f/4L USM

Canon EF 17-40mm f/4L USM

Wide angle lens

$739
Compare the EF 17-40mm f/4L USM vs the 10-20mm f/3.5 EX DC HSM Canon-ef
Compare the EF 17-40mm f/4L USM vs the Zuiko 9-18mm f/4-5.6 ED

Sigma 10-20mm f/3.5 EX DC HSM Canon-ef Competitors

Advantages

Disadvantages
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

$569
Wide maximum Much narrower aperture
Aperture Wider aperture
Focus motor Doesn't have a silent focus motor
Magnification Slightly less magnification
Compare the 11-16mm f/2.8 AT-X 116 Pro DX Canon-ef vs the 10-20mm f/3.5 EX DC 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

$429
Wide maximum Much narrower aperture
Fixed aperture Has a variable aperture
Aperture Narrower aperture
Compare the 10-20mm f/4-5.6 EX DC HSM Canon-ef vs the 10-20mm f/3.5 EX DC HSM Canon-ef
Rokinon 14mm f/2.8 IF ED UMC Canon-ef

Rokinon 14mm f/2.8 IF ED UMC Canon-ef

Wide angle lens

$349
Prime lens Is a prime lens
Aperture Wider aperture
Auto focus Auto focus
Focus motor Doesn't have a silent focus motor
Compare the 14mm f/2.8 IF ED UMC Canon-ef vs the 10-20mm f/3.5 EX DC HSM Canon-ef
Canon EF 20mm f/2.8 USM

Canon EF 20mm f/2.8 USM

Wide angle lens

$489
Wide maximum Much narrower aperture
Prime lens Is a prime lens
Zoom range Less zoom
Compare the EF 20mm f/2.8 USM vs the 10-20mm f/3.5 EX DC HSM Canon-ef
Canon EF-S 15-85mm f/3.5-5.6 IS USM

Canon EF-S 15-85mm f/3.5-5.6 IS USM

Travel lens

$699
Image stabilization Image stabilization
Zoom range Significantly more zoom
Fixed aperture Has a variable aperture
Compare the EF-S 15-85mm f/3.5-5.6 IS USM vs the 10-20mm f/3.5 EX DC HSM Canon-ef

Olympus Zuiko 9-18mm f/4-5.6 ED Competitors

Advantages

Disadvantages
Panasonic Lumix G Vario 7-14mm f/4

Panasonic Lumix G Vario 7-14mm f/4

Wide angle lens

$959
Fixed aperture Has a consant aperture
Magnification Slightly less magnification
Lowest price Slightly more expensive
Compare the Lumix G Vario 7-14mm f/4 vs the Zuiko 9-18mm f/4-5.6 ED
Olympus Zuiko M. ED 12mm f/2

Olympus Zuiko M. ED 12mm f/2

Low light lens

$699
Prime lens Is a prime lens
Aperture Significantly wider aperture
Zoom range Less zoom
Magnification Slightly less magnification
Compare the Zuiko M. ED 12mm f/2 vs the Zuiko 9-18mm f/4-5.6 ED
Sigma 10mm f/2.8 EX DC HSM Nikon-f

Sigma 10mm f/2.8 EX DC HSM Nikon-f

Fisheye lens

$649
Fisheye Fisheye lens
Focus motor Has a silent focus motor
Zoom range Less zoom
Length Slightly longer
Compare the 10mm f/2.8 EX DC HSM Nikon-f vs the Zuiko 9-18mm f/4-5.6 ED

discussion Which do you think is better?

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