Sigma
20mm f/1.8 EX DG DF RF Nikon-f
 vs
Sigma
15mm f/2.8 EX DG Canon-ef

vs

differences

Reasons to consider the Sigma 20mm f/1.8 EX DG DF RF Nikon-f
Wider aperture f/1.8 vs f/2.8
Help
 At its widest, the 20mm f/1.8 EX DG DF RF Nikon-f captures much more light, 1.3 f-stops
Sigma 20mm f/1.8 EX DG DF RF Nikon-f Learn more about
the Sigma 20mm f/1.8 EX DG DF RF Nikon-f

Reasons to consider the Sigma 15mm f/2.8 EX DG Canon-ef
Fisheye lens Yes vs No
Help
 Fisheye lenses take extremely wide 'circular' looking images
Slightly shorter 65 mm vs 86 mm
Help
 More than 20% shorter
Slightly smaller diameter 73 mm vs 89 mm
Help
 Around 20% smaller lens at the end
Slightly lighter 370 g vs 0.5 kg
Help
 Around 30% lighter
Sigma 15mm f/2.8 EX DG Canon-ef Learn more about
the Sigma 15mm f/2.8 EX DG Canon-ef

similarities

Compared to lenses

Common Strengths Common Weaknesses
Prime lens Fixed focal length prime lenses Help
Typically very sharp
Max focal length Poor telephoto Help
20mm f/1.8 EX DG DF RF Nikon-f:20 mm
15mm f/2.8 EX DG Canon-ef:15 mm
Focus motor No silent focus motor Help
Louder and slower
Zoom range Poor zoom Help
1x

competitors

Shared Competitors

Advantages

Disadvantages
Tamron 14mm f/2.8 IF Nikon-f

Tamron 14mm f/2.8 IF Nikon-f

Wide angle lens

$799
Aperture Has a narrower aperture
Compare the 14mm f/2.8 IF Nikon-f vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the 14mm f/2.8 IF Nikon-f vs the 15mm f/2.8 EX DG Canon-ef
Rokinon 8mm f/3.5 Nikon-f

Rokinon 8mm f/3.5 Nikon-f

Fisheye lens

$250
Aperture Has a narrower aperture
Auto focus Lacks autofocus
Compare the 8mm f/3.5 Nikon-f vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the 8mm f/3.5 Nikon-f vs the 15mm f/2.8 EX DG Canon-ef
Canon EF 16-35mm f/2.8L II USM

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

Fisheye lens

$1,499 - $1,699
Focus motor Has a silent focus motor
Aperture Has a narrower aperture
Prime lens Is a zoom lens
Compare the EF 16-35mm f/2.8L II USM vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the EF 16-35mm f/2.8L II USM vs the 15mm f/2.8 EX DG Canon-ef
Zeiss Distagon 21mm f/2.8 ZF T* Nikon-f

Zeiss Distagon 21mm f/2.8 ZF T* Nikon-f

Wide angle lens

$1,490
Aperture Has a narrower aperture
Auto focus Lacks autofocus
Compare the Distagon 21mm f/2.8 ZF T* Nikon-f vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the Distagon 21mm f/2.8 ZF T* Nikon-f vs the 15mm f/2.8 EX DG Canon-ef
Nikon Nikkor 14mm f/2.8D ED

Nikon Nikkor 14mm f/2.8D ED

Fisheye lens

$1,479
Aperture Has a narrower aperture
Compare the Nikkor 14mm f/2.8D ED vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the Nikkor 14mm f/2.8D ED vs the 15mm f/2.8 EX DG Canon-ef
Zeiss Distagon 15mm f/2.8 ZE Canon-ef

Zeiss Distagon 15mm f/2.8 ZE Canon-ef

Wide angle lens

$2,950
Lowest price Is slightly more expensive
Aperture Has a narrower aperture
Compare the Distagon 15mm f/2.8 ZE Canon-ef vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the Distagon 15mm f/2.8 ZE Canon-ef vs the 15mm f/2.8 EX DG Canon-ef
Nikon Nikkor 20mm f/2.8 AIS

Nikon Nikkor 20mm f/2.8 AIS

Wide angle lens

$649
Aperture Has a narrower aperture
Auto focus Lacks autofocus
Compare the Nikkor 20mm f/2.8 AIS vs the 20mm f/1.8 EX DG DF RF Nikon-f
Compare the Nikkor 20mm f/2.8 AIS vs the 15mm f/2.8 EX DG Canon-ef

Sigma 20mm f/1.8 EX DG DF RF Nikon-f Competitors

Advantages

Disadvantages
Samsung 16mm f/2.4 Pancake

Samsung 16mm f/2.4 Pancake

Low light lens

$300
Weight Lighter
Lowest price Slightly cheaper
Aperture Narrower aperture
Magnification Less magnification
Compare the 16mm f/2.4 Pancake vs the 20mm f/1.8 EX DG DF RF Nikon-f
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

$330
Image stabilization Image stabilization
Focus motor Has a silent focus motor
Prime lens Is a zoom lens
Aperture Significantly narrower aperture
Compare the Nikkor 18-105mm f/3.5-5.6G ED VR AF-S DX vs the 20mm f/1.8 EX DG DF RF Nikon-f
Sigma 10-20mm f/3.5 EX DC HSM Nikon-f

Sigma 10-20mm f/3.5 EX DC HSM Nikon-f

Wide angle lens

$599
Focus motor Has a silent focus motor
Zoom range More zoom
Prime lens Is a zoom lens
Aperture Significantly narrower aperture
Compare the 10-20mm f/3.5 EX DC HSM Nikon-f vs the 20mm f/1.8 EX DG DF RF Nikon-f

Sigma 15mm f/2.8 EX DG Canon-ef Competitors

Advantages

Disadvantages
Canon EF 15mm f/2.8

Canon EF 15mm f/2.8

Fisheye lens

$646
Magnification Less magnification
Compare the EF 15mm f/2.8 vs the 15mm f/2.8 EX DG Canon-ef
Canon EF 8-15mm f/4L USM

Canon EF 8-15mm f/4L USM

Fisheye lens

$1,349
Focus motor Has a silent focus motor
Magnification More magnification
Prime lens Is a zoom lens
Aperture Narrower aperture
Compare the EF 8-15mm f/4L USM vs the 15mm f/2.8 EX DG Canon-ef
Sigma 10mm f/2.8 EX DC HSM Canon-ef

Sigma 10mm f/2.8 EX DC HSM Canon-ef

Fisheye lens

$649
Focus motor Has a silent focus motor
Magnification Slightly more magnification
Length Slightly longer
Compare the 10mm f/2.8 EX DC HSM Canon-ef vs the 15mm f/2.8 EX DG Canon-ef
Nikon Nikkor 16mm f/2.8D

Nikon Nikkor 16mm f/2.8D

Fisheye lens

$750
Magnification Less magnification
Compare the Nikkor 16mm f/2.8D vs the 15mm f/2.8 EX DG Canon-ef
Tokina 10-17mm f/3.5-4.5 AT-X 107 DX Nikon-f

Tokina 10-17mm f/3.5-4.5 AT-X 107 DX Nikon-f

Fisheye lens

$579
Magnification More magnification
Zoom range Slightly more zoom
Prime lens Is a zoom lens
Aperture Narrower aperture
Compare the 10-17mm f/3.5-4.5 AT-X 107 DX Nikon-f vs the 15mm f/2.8 EX DG Canon-ef

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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