Pentax SMC
FA 77mm f/1.8
 vs
Pentax SMC
FA 31mm f/1.8

vs

differences

Reasons to consider the Pentax FA 77mm f/1.8
Better telephoto 77 mm vs 31 mm
Help
 Around 2.5x more reach, less perspective distortion
Slightly smaller diameter 48 mm vs 66 mm
Help
 Around 30% smaller lens at the end
Slightly cheaper $1,046.95 vs $1,296.95
Help
 The best price we've seen is $250 cheaper (around 20% less)
Pentax SMC FA 77mm f/1.8 Learn more about
the Pentax FA 77mm f/1.8

Reasons to consider the Pentax FA 31mm f/1.8
Better wide angle 31 mm vs 77 mm
Help
 2.5x better wide angle
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
Length Short Help
FA 77mm f/1.8:64 mm
FA 31mm f/1.8:69 mm
Focus motor No silent focus motor Help
Louder and slower
Zoom range Poor zoom Help
1x
Magnification Poor magnification Help
FA 77mm f/1.8:1:7 (0.1x)
FA 31mm f/1.8:1:6.2 (0.2x)

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
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
Compare the 35mm f/1.4 DG HSM A1 Pentax-k vs the SMC FA 77mm f/1.8
Compare the 35mm f/1.4 DG HSM A1 Pentax-k vs the SMC FA 31mm f/1.8
Pentax SMC FA 43mm f/1.9

Pentax SMC FA 43mm f/1.9

Low light lens

$747
Compare the SMC FA 43mm f/1.9 vs the SMC FA 77mm f/1.8
Compare the SMC FA 43mm f/1.9 vs the SMC FA 31mm f/1.8
Pentax SMC 55mm f/1.4 DA* SDM

Pentax SMC 55mm f/1.4 DA* SDM

Low light lens

$797
Focus motor Has a silent focus motor
Compare the SMC 55mm f/1.4 DA* SDM vs the SMC FA 77mm f/1.8
Compare the SMC 55mm f/1.4 DA* SDM vs the SMC FA 31mm f/1.8

Pentax SMC FA 77mm f/1.8 Competitors

Advantages

Disadvantages
Pentax SMC DA 70mm f/2.4

Pentax SMC DA 70mm f/2.4

Low light lens

$697
Length Shorter
Lowest price Slightly cheaper
Aperture Narrower aperture
Diameter Slightly larger diameter
Compare the SMC DA 70mm f/2.4 vs the SMC FA 77mm f/1.8
Sigma 85mm f/1.4 EX DG HSM Pentax-k

Sigma 85mm f/1.4 EX DG HSM Pentax-k

Sports lens

$899
Focus motor Has a silent focus motor
Aperture Wider aperture
Wide maximum Wider aperture
Magnification Slightly less magnification
Compare the 85mm f/1.4 EX DG HSM Pentax-k vs the SMC FA 77mm f/1.8
Canon 85mm f/1.8 EF USM

Canon 85mm f/1.8 EF USM

Low light lens

$369
Focus motor Has a silent focus motor
Lowest price Slightly cheaper
Weight Slightly heavier
Compare the 85mm f/1.8 EF USM vs the SMC FA 77mm f/1.8
Sigma 8mm f/3.5 EX DG Circular

Sigma 8mm f/3.5 EX DG Circular

Fisheye lens

$899
Fisheye Fisheye lens
Min focal length Better wide angle
Aperture Significantly narrower aperture
Max focal length Worse telephoto
Compare the 8mm f/3.5 EX DG Circular vs the SMC FA 77mm f/1.8
Pentax SMC DA FA 100mm f/2.8 WR Macro

Pentax SMC DA FA 100mm f/2.8 WR Macro

Macro lens

$847
Magnification Much more magnification
Wide maximum Significantly narrower aperture
Aperture Narrower aperture
Min focal length Slightly worse wide angle
Compare the SMC DA FA 100mm f/2.8 WR Macro vs the SMC FA 77mm f/1.8

Pentax SMC FA 31mm f/1.8 Competitors

Advantages

Disadvantages
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
Zeiss Distagon T* 35mm f/2 ZF.2 Nikon-f

Zeiss Distagon T* 35mm f/2 ZF.2 Nikon-f

Low light lens

$1,117
Magnification Slightly more magnification
Auto focus Auto focus
Length Longer
Compare the Distagon T* 35mm f/2 ZF.2 Nikon-f 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
Fujifilm 35mm f/1.4 XF R

Fujifilm 35mm f/1.4 XF R

Low light lens
Aperture Wider aperture
Weight Slightly lighter
Compare the 35mm f/1.4 XF R vs the SMC FA 31mm f/1.8
Nikon Nikkor 20mm f/2.8D

Nikon Nikkor 20mm f/2.8D

Wide angle lens

$529
Lowest price Cheaper
Length Slightly shorter
Aperture Narrower aperture
Magnification Slightly less magnification
Compare the Nikkor 20mm f/2.8D 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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