Sigma
12-24mm f/4.5-5.6 Pentax-k
 vs
Canon
EF 15mm f/2.8

vs

differences

Reasons to consider the Sigma 12-24mm f/4.5-5.6 Pentax-k
More zoom 2x vs 1x
Help
 2x more zoom, giving you more flexibility for photos
Sigma 12-24mm f/4.5-5.6 Pentax-k Learn more about
the Sigma 12-24mm f/4.5-5.6 Pentax-k

Reasons to consider the Canon EF 15mm f/2.8
Fisheye lens Yes vs No
Help
 Fisheye lenses take extremely wide 'circular' looking images
Is a prime lens Yes vs No
Help
 Prime lenses have a single focal length, they are typically sharper and have wider apertures
Significantly wider aperture f/2.8 vs f/4.5
Help
 At its widest, the EF 15mm f/2.8 captures slightly more light, 1.4 f-stops
Shorter 61 mm vs 100 mm
Help
 Around 40% shorter
Slightly lighter 331 g vs 0.6 kg
Help
 Around 50% lighter
Slightly smaller diameter 74 mm vs 87 mm
Help
 More than 10% smaller lens at the end
Canon EF 15mm f/2.8 Learn more about
the Canon EF 15mm f/2.8

similarities

Compared to lenses

Common Strengths Common Weaknesses
Min focal length Good wide-angle Help
12-24mm f/4.5-5.6 Pentax-k:12 mm
EF 15mm f/2.8:15 mm
Max focal length Poor telephoto Help
12-24mm f/4.5-5.6 Pentax-k:24 mm
EF 15mm f/2.8:15 mm
Focus motor No silent focus motor Help
Louder and slower
Magnification Poor magnification Help
1:7.1 (0.1x)

competitors

Shared Competitors

Advantages

Disadvantages
Canon EF 8-15mm f/4L USM

Canon EF 8-15mm f/4L USM

Fisheye lens

$1,349
Magnification Has better macro
Focus motor Has a silent focus motor
Aperture Has a narrower aperture
Compare the EF 8-15mm f/4L USM vs the 12-24mm f/4.5-5.6 Pentax-k
Compare the EF 8-15mm f/4L USM vs the EF 15mm f/2.8
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 12-24mm f/4.5-5.6 Pentax-k
Compare the 8mm f/3.5 Nikon-f vs the EF 15mm f/2.8
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
Focus motor Has a silent focus motor
Aperture Has a narrower aperture
Compare the EF-S 10-22mm f/3.5-4.5 USM vs the 12-24mm f/4.5-5.6 Pentax-k
Compare the EF-S 10-22mm f/3.5-4.5 USM vs the EF 15mm f/2.8
Nikon Nikkor 16mm f/2.8D

Nikon Nikkor 16mm f/2.8D

Fisheye lens

$750
Compare the Nikkor 16mm f/2.8D vs the 12-24mm f/4.5-5.6 Pentax-k
Compare the Nikkor 16mm f/2.8D vs the EF 15mm f/2.8
Rokinon 14mm f/2.8 IF ED UMC Canon-ef

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

Wide angle lens

$349
Auto focus Lacks autofocus
Compare the 14mm f/2.8 IF ED UMC Canon-ef vs the 12-24mm f/4.5-5.6 Pentax-k
Compare the 14mm f/2.8 IF ED UMC Canon-ef vs the EF 15mm f/2.8
Fujifilm XF 14mm f/2.8 R

Fujifilm XF 14mm f/2.8 R

Lens
Compare the XF 14mm f/2.8 R vs the 12-24mm f/4.5-5.6 Pentax-k
Compare the XF 14mm f/2.8 R vs the EF 15mm f/2.8

Sigma 12-24mm f/4.5-5.6 Pentax-k Competitors

Advantages

Disadvantages
Rokinon 8mm f/2.8 Samsung-nx

Rokinon 8mm f/2.8 Samsung-nx

Fisheye lens

$349
Fisheye Fisheye lens
Prime lens Is a prime lens
Auto focus Auto focus
Zoom range Less zoom
Compare the 8mm f/2.8 Samsung-nx vs the 12-24mm f/4.5-5.6 Pentax-k
Sigma 8-16mm f/4.5-5.6 DC HSM Pentax-k

Sigma 8-16mm f/4.5-5.6 DC HSM Pentax-k

Wide angle lens

$699
Focus motor Has a silent focus motor
Compare the 8-16mm f/4.5-5.6 DC HSM Pentax-k vs the 12-24mm f/4.5-5.6 Pentax-k
Nikon Nikkor AF-S 16-35mm f/4G ED VR

Nikon Nikkor AF-S 16-35mm f/4G ED VR

Wide angle lens

$1,257
Image stabilization Image stabilization
Fixed aperture Has a consant aperture
Length Slightly longer
Lowest price Slightly more expensive
Compare the Nikkor AF-S 16-35mm f/4G ED VR vs the 12-24mm f/4.5-5.6 Pentax-k

Canon EF 15mm f/2.8 Competitors

Advantages

Disadvantages
Canon EF 50mm f/1.8 II

Canon EF 50mm f/1.8 II

Low light lens

$98 - $125
Aperture Wider aperture
Max focal length Slightly better telephoto
Fisheye Not a fisheye
Min focal length Worse wide angle
Compare the EF 50mm f/1.8 II vs the EF 15mm f/2.8
Sigma 15mm f/2.8 EX DG Canon-ef

Sigma 15mm f/2.8 EX DG Canon-ef

Fisheye lens

$609
Magnification More magnification
Compare the 15mm f/2.8 EX DG Canon-ef vs the EF 15mm f/2.8
Rokinon 8mm f/3.5 Canon-ef

Rokinon 8mm f/3.5 Canon-ef

Fisheye lens

$269
Lowest price Slightly cheaper
Auto focus Auto focus
Aperture Narrower aperture
Compare the 8mm f/3.5 Canon-ef vs the EF 15mm f/2.8
Canon EF 20mm f/2.8 USM

Canon EF 20mm f/2.8 USM

Wide angle lens

$489
Focus motor Has a silent focus motor
Fisheye Not a fisheye
Length Slightly longer
Compare the EF 20mm f/2.8 USM vs the EF 15mm f/2.8

discussion Which do you think is better?

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