Sigma
28mm f/1.8 EX DG DF Macro
 vs
Pentax SMC
FA 31mm f/1.8

vs

differences

Reasons to consider the Sigma 28mm f/1.8 EX DG DF Macro
More magnification 1:2.9 (0.3x) vs 1:6.2 (0.2x)
Help
 Take macro shots with subjects more than 2x larger in your photo
Cheaper $449.00 vs $1,296.95
Help
 The best price we've seen is $848 cheaper (2.9x less)
Sigma 28mm f/1.8 EX DG DF Macro Learn more about
the Sigma 28mm f/1.8 EX DG DF Macro

Reasons to consider the Pentax FA 31mm f/1.8
Slightly smaller diameter 66 mm vs 84 mm
Help
 More than 20% smaller lens at the end
Slightly shorter 69 mm vs 79 mm
Help
 More than 10% shorter
Slightly lighter 345 g vs 481 g
Help
 Around 30% lighter
Pentax SMC FA 31mm f/1.8 Learn more about
the Pentax FA 31mm f/1.8

similarities

Compared to lenses

Common Strengths Common Weaknesses
Aperture Wide aperture Help
f/1.8
Prime lens Fixed focal length prime lenses Help
Typically very sharp
Focus motor No silent focus motor Help
Louder and slower
Max focal length Poor telephoto Help
28mm f/1.8 EX DG DF Macro:28 mm
FA 31mm f/1.8:31 mm
Zoom range Poor zoom Help
1x

Compared to low light lenses

Common Strengths Common Weaknesses
Auto focus Auto focus Help
Easier to use

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

competitors

Shared Competitors

Advantages

Disadvantages
Nikon Nikkor 35mm f/1.4 AIS

Nikon Nikkor 35mm f/1.4 AIS

Low light lens

$799
Wide maximum Has a lower max f/stop
Auto focus Lacks autofocus
Compare the Nikkor 35mm f/1.4 AIS vs the 28mm f/1.8 EX DG DF Macro
Compare the Nikkor 35mm f/1.4 AIS vs the SMC FA 31mm f/1.8
Leica Summicron 35mm f/2 M

Leica Summicron 35mm f/2 M

Low light lens

$3,195
Lowest price Is slightly more expensive
Wide maximum Has a lower max f/stop
Compare the Summicron 35mm f/2 M vs the 28mm f/1.8 EX DG DF Macro
Compare the Summicron 35mm f/2 M vs the SMC FA 31mm f/1.8

Sigma 28mm f/1.8 EX DG DF Macro Competitors

Advantages

Disadvantages
Nikon Nikkor AF-S 35mm f/1.8G DX

Nikon Nikkor AF-S 35mm f/1.8G DX

Low light lens

$197
Focus motor Has a silent focus motor
Length Slightly shorter
Magnification Less magnification
Compare the Nikkor AF-S 35mm f/1.8G DX vs the 28mm f/1.8 EX DG DF Macro
Canon EF 17-40mm f/4L USM

Canon EF 17-40mm f/4L USM

Wide angle lens

$739
Focus motor Has a silent focus motor
Zoom range More zoom
Aperture Much narrower aperture
Prime lens Is a zoom lens
Compare the EF 17-40mm f/4L USM vs the 28mm f/1.8 EX DG DF Macro
Rokinon 14mm f/2.8 IF ED UMC Nikon-f

Rokinon 14mm f/2.8 IF ED UMC Nikon-f

Wide angle lens

$350
Min focal length Slightly better wide angle
Auto focus Auto focus
Aperture Narrower aperture
Compare the 14mm f/2.8 IF ED UMC Nikon-f vs the 28mm f/1.8 EX DG DF Macro
Canon EF 28mm f/1.8 USM

Canon EF 28mm f/1.8 USM

Low light lens

$449
Focus motor Has a silent focus motor
Length Slightly shorter
Magnification Less magnification
Compare the EF 28mm f/1.8 USM vs the 28mm f/1.8 EX DG DF Macro
Sigma 24mm f/1.8 EX DG DF Macro

Sigma 24mm f/1.8 EX DG DF Macro

Low light lens

$549
Compare the 24mm f/1.8 EX DG DF Macro vs the 28mm f/1.8 EX DG DF Macro

Pentax SMC FA 31mm f/1.8 Competitors

Advantages

Disadvantages
Sigma 35mm f/1.4 DG HSM A1 Pentax-k

Sigma 35mm f/1.4 DG HSM A1 Pentax-k

Low light lens

$899
Focus motor Has a silent focus motor
Aperture Wider aperture
Weight Slightly heavier
Compare the 35mm f/1.4 DG HSM A1 Pentax-k vs the SMC FA 31mm f/1.8
Sigma 30mm f/1.4 EX DC Pentax-k

Sigma 30mm f/1.4 EX DC Pentax-k

Low light lens

$439
Aperture Wider aperture
Lowest price Cheaper
Wide maximum Wider aperture
Magnification Slightly less magnification
Compare the 30mm f/1.4 EX DC Pentax-k vs the SMC FA 31mm f/1.8
Pentax SMC DA 21mm f/3.2 AL

Pentax SMC DA 21mm f/3.2 AL

Lens

$647
Length Shorter
Lowest price Slightly cheaper
Aperture Significantly narrower aperture
Compare the SMC DA 21mm f/3.2 AL vs the SMC FA 31mm f/1.8
Olympus M.Zuiko 17mm f/2.8

Olympus M.Zuiko 17mm f/2.8

Lens

$299
Lowest price Cheaper
Weight Slightly lighter
Aperture Narrower aperture
Magnification Slightly less magnification
Compare the M.Zuiko 17mm f/2.8 vs the SMC FA 31mm f/1.8
Pentax SMC FA 50mm f/1.4

Pentax SMC FA 50mm f/1.4

Low light lens

$447
Aperture Wider aperture
Lowest price Cheaper
Min focal length Slightly worse wide angle
Magnification Slightly less magnification
Compare the SMC FA 50mm f/1.4 vs the SMC FA 31mm f/1.8

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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