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Pentax HD -FA 31mm F1.8 Limited Review
HD Pentax-FA 31mm F1.8 Limited

Main Features

  • 31mm Focal Range
  • F1.8 Max Aperture
  • Filter Thread: 58mm
  • Max Format: 35mm FF
  • Pentax KAF Mount
  • Weight: 341g.
  • Diameter: 65mm
  • Length: 69mm
  • Min Focus Distance:0.3m
  • Max Magnification:0.16x
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HD Pentax-FA 31mm F1.8 Ltd Overview
HD Pentax-FA 31mm F1.8 Ltd is an Auto Focus (AF) Wideangle Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF mount cameras.

Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Model Coverage Weight Focusing Street Price
Pentax smc FA 31mm F1.8 AL Limited Lens Pentax smc FA 31mm F1.8 AL Limited
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35mm FF 345gr AF Amazon B&H Photo

Lens Mount

HD Pentax-FA 31mm F1.8 Ltd is compatible with cameras that have Pentax KAF lens mount.Some of the latest released cameras with Pentax KAF lens mount are Pentax K-3 III, Pentax K-1 II and Pentax KP.

Sensor Coverage

Max sensor coverage of HD Pentax-FA 31mm F1.8 Ltd is 35mm FF.

Focal Range

HD Pentax-FA 31mm F1.8 Ltd has a fixed focal lenght of 31mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 31mm.

Body Colour

Black, silver

Aperture

HD Pentax-FA 31mm F1.8 Ltd has a max aperture of F1.8 and a minimum aperture of F22.
Pros and Cons of HD Pentax-FA 31mm F1.8 Limited

PROs
Built-in Autofocus
Hood supplied
Fast Aperture
Covers Full-Frame Sensor

CONs
No Weather Sealing
HD Pentax-FA 31mm F1.8 Ltd Detailed Specifications

General
Brand Pentax
Lens Type Prime
Lens Type Wideangle Prime
Lens Mount Pentax KAF
Max Format 35mm FF
Focal Range 31mm
Image Stabilization
Colour Black, silver
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F1.8
Min Aperture F22
Aperture Ring Yes
Diaphragm Blades 9
Optics
Optical Elements 9
Optical Groups 7
Special Elements HD + Super Protect coatings

FOCUSING
Min Focus Distance 0.3m
Max Magnification 0.16X
Autofocus Yes
AF Motor Type Screw drive from camera
Full Time Manual Unknown
Focus Method Internal
Distance Scale Yes
DoF Scale Yes
PHYSICAL SPECS
Weight 341g
Diameter 65mm
Length 69mm
Materials Aluminum
Weather Sealing No
Filter Thread 58mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
HD Pentax-FA 31mm F1.8 Limited Alternatives in Pentax KAF Mount
Model Coverage Weight Focusing Street Price
HD Pentax DA 35mm F2.8 Macro Limited Lens HD Pentax DA 35mm F2.8 Macro Limited
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APS-C / DX 214gr AF Amazon B&H Photo
Pentax smc DA 35mm F2.4 AL Lens Pentax smc DA 35mm F2.4 AL
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APS-C / DX 124gr AF Amazon B&H Photo
Pentax smc DA 35mm F2.8 Macro Limited Lens Pentax smc DA 35mm F2.8 Macro Limited
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APS-C / DX 215gr AF Amazon B&H Photo
Pentax smc FA 31mm F1.8 AL Limited Lens Pentax smc FA 31mm F1.8 AL Limited
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35mm FF 345gr AF Amazon B&H Photo
Venus Laowa 25mm F2.8 2.5-5X Ultra Macro Lens Venus Laowa 25mm F2.8 2.5-5X Ultra Macro
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35mm FF 400gr MF Amazon B&H Photo
Samsung D-Xenon 35mm F2 AL Lens Samsung D-Xenon 35mm F2 AL
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35mm FF 195gr AF Amazon B&H Photo
Samyang 35mm F1.4 AS UMC Lens Samyang 35mm F1.4 AS UMC
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35mm FF 660gr MF Amazon B&H Photo
Schneider PC-Super-Angulon 28mm f2.8 Lens Schneider PC-Super-Angulon 28mm f2.8
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35mm FF 565gr MF Amazon B&H Photo
Lensbaby Burnside 35 Lens Lensbaby Burnside 35
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35mm FF 374gr MF Amazon B&H Photo
Carl Zeiss Distagon T 2,825 Lens Carl Zeiss Distagon T 2,825
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35mm FF 480gr MF Amazon B&H Photo
Carl Zeiss Distagon T 228 Lens Carl Zeiss Distagon T 228
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35mm FF 520gr MF Amazon B&H Photo
Carl Zeiss Distagon T 235 Lens Carl Zeiss Distagon T 235
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35mm FF 570gr MF Amazon B&H Photo
Sigma 28mm F1.8 EX DG Aspherical Macro Lens Sigma 28mm F1.8 EX DG Aspherical Macro
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35mm FF 500gr AF Amazon B&H Photo
Rokinon 35mm f1.4 Lens Rokinon 35mm f1.4
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35mm FF 660gr MF Amazon B&H Photo
Sigma 30mm F1.4 EX DC HSM Lens Sigma 30mm F1.4 EX DC HSM
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APS-C / DX 430gr AF Amazon B&H Photo
Sigma 35mm F1.4 DG HSM Lens Sigma 35mm F1.4 DG HSM
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35mm FF 665gr AF Amazon B&H Photo
Frequently Asked Questions about HD Pentax-FA 31mm F1.8 Limited
is the HD Pentax-FA 31mm F1.8 Limited a Weather Sealed lens?
What is the Minimum Focusing Distance of HD Pentax-FA 31mm F1.8 Limited
is the HD Pentax-FA 31mm F1.8 Limited an Autofocus (AF) lens?
What is the Filter Thread Size of HD Pentax-FA 31mm F1.8 Limited
Does HD Pentax-FA 31mm F1.8 Limited have Image Stabilization?
Does HD Pentax-FA 31mm F1.8 Limited have Aperture Ring?
What is the Maximum Magnification Ratio of HD Pentax-FA 31mm F1.8 Limited
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