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Pentax HD FA 31mm f/1.8 Limited Lens

Pentax HD FA 31mm f/1.8 Limited Lens

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PRODUCT ENQUIRY
  • K-Mount Lens/Full-Frame Format
  • Aperture Range: f/1.8 to f/22
  • High-Grade PENTAX HD Multi-Layer Coating
  • 9 Elements in 7 Groups
  • Super Protect SP Coating
  • 9-Blade Round Diaphragm
  • Integrated Lens Hood
  • Compact Form Factor
Brand: Pentax   |    Code: 00ZPXHDFA31F18

High-grade lens with superb image rendition and beautiful texture

While inheriting the design concept of the Limited series, this lens was designed through a series of mechanical and numerical evaluations, as well as human assessment of test-shooting samples, to deliver an image rendition unmatched by other models. The barrel, hood and cap are all made of high-grade aluminum, meticulously machined for an attractive appearance and beautiful texture. It also features a mount pointer with a shippoyaki (cloisonné) finish, which lets the user effortlessly and quickly mount the lens to a camera body.

HD coating for exceptional image rendition

This lens is treated with PENTAX-original HD coating.* Compared with conventional multi-layer coatings, this high-grade coating assures higher light transmittance and lower reflectance to deliver sharp, clear images free of flare and ghost images, even under such adverse lighting conditions as backlight. It elevates the imaging performance a further step up.

* HD stands for High Definition.

Round-shaped diaphragm for beautiful bokeh effect

This lens features a completely round-shaped diaphragm, which produces a natural, beautiful bokeh (defocus) effect in the images captured, while optimizing the imaging performance of the distinctive Limited-series optics contained within.

SP coating to repel dust and protect lens surface

Applied to the front optical element, the PENTAX-developed SP (Super Protect) coating effectively repels water and grease to keep the lens surface free of dust, water and oily substances. This coating is also highly resistant to abrasion and scratches, keeping the lens scratch-free.

Other features

The black model is marked with serial numbers starting with 0000001, while the silver model starts with 1000001. The lens also features an aperture ring to make best use of the range of functions featured in K-mount film-format cameras.

Focal Length

31mm
Equivalent to 47.5mm in 35mm format
(when attached to PENTAX APS-C size DSLR cameras)

Maximum Aperture

F1.8

Minimum Aperture

F22

Lens Construction

9 elements in 7 groups

Angle of View (Diagonal)

70°(when attached to PENTAX 35mm full-frame SLR cameras)
49°(when attached to PENTAX APS-C size DSLR cameras)

Mount

KAF

Minimum Focusing Distance

0.3m (0.98ft.)

Maximum Magnification

0.16x

Filter Diameter

58mm

Diaphragm Control

Fully automatic

Number of Diaphragm Blades

9
Rounded diaphragm (31mm:F1.8-F3.5)

Aperture Ring

equipped

Tripod Mount

N/A

Lens Hood

fixed

Lens Cap

O-LW65B (included)

Lens Case

P70-140 (included)

Maximum Diameter x Length

approx. 65mm x 69mm (approx. 2.6in. x 2.7in.)

Weight

approx. 341g
(approx. 12.0oz.)

Temperature

-10°C~40°C (14°F~104°F)

Humidity

85% or less (no condensation)

Included Accessories

Lens Cap O-LW65B, Lens Mount Cap K, Lens Case P70-140

Others

HD Coating
SP (Super Protect) Coating

 

  • Pentax HD Pentax-FA 31mm f/1.8 Limited
  • Pentax O-LW65A Lens Cap for HD Pentax-DA 20-40mm f/2.8-4 Limited DC WR Lens
  • Pentax Rear Lens Cap (B) for Bayonet Mount Lenses
  • Lens Case
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FEATURES

High-grade lens with superb image rendition and beautiful texture

While inheriting the design concept of the Limited series, this lens was designed through a series of mechanical and numerical evaluations, as well as human assessment of test-shooting samples, to deliver an image rendition unmatched by other models. The barrel, hood and cap are all made of high-grade aluminum, meticulously machined for an attractive appearance and beautiful texture. It also features a mount pointer with a shippoyaki (cloisonné) finish, which lets the user effortlessly and quickly mount the lens to a camera body.

HD coating for exceptional image rendition

This lens is treated with PENTAX-original HD coating.* Compared with conventional multi-layer coatings, this high-grade coating assures higher light transmittance and lower reflectance to deliver sharp, clear images free of flare and ghost images, even under such adverse lighting conditions as backlight. It elevates the imaging performance a further step up.

* HD stands for High Definition.

Round-shaped diaphragm for beautiful bokeh effect

This lens features a completely round-shaped diaphragm, which produces a natural, beautiful bokeh (defocus) effect in the images captured, while optimizing the imaging performance of the distinctive Limited-series optics contained within.

SP coating to repel dust and protect lens surface

Applied to the front optical element, the PENTAX-developed SP (Super Protect) coating effectively repels water and grease to keep the lens surface free of dust, water and oily substances. This coating is also highly resistant to abrasion and scratches, keeping the lens scratch-free.

Other features

The black model is marked with serial numbers starting with 0000001, while the silver model starts with 1000001. The lens also features an aperture ring to make best use of the range of functions featured in K-mount film-format cameras.

SPECIFICATIONS

Focal Length

31mm
Equivalent to 47.5mm in 35mm format
(when attached to PENTAX APS-C size DSLR cameras)

Maximum Aperture

F1.8

Minimum Aperture

F22

Lens Construction

9 elements in 7 groups

Angle of View (Diagonal)

70°(when attached to PENTAX 35mm full-frame SLR cameras)
49°(when attached to PENTAX APS-C size DSLR cameras)

Mount

KAF

Minimum Focusing Distance

0.3m (0.98ft.)

Maximum Magnification

0.16x

Filter Diameter

58mm

Diaphragm Control

Fully automatic

Number of Diaphragm Blades

9
Rounded diaphragm (31mm:F1.8-F3.5)

Aperture Ring

equipped

Tripod Mount

N/A

Lens Hood

fixed

Lens Cap

O-LW65B (included)

Lens Case

P70-140 (included)

Maximum Diameter x Length

approx. 65mm x 69mm (approx. 2.6in. x 2.7in.)

Weight

approx. 341g
(approx. 12.0oz.)

Temperature

-10°C~40°C (14°F~104°F)

Humidity

85% or less (no condensation)

Included Accessories

Lens Cap O-LW65B, Lens Mount Cap K, Lens Case P70-140

Others

HD Coating
SP (Super Protect) Coating

 

IN THE BOX

  • Pentax HD Pentax-FA 31mm f/1.8 Limited
  • Pentax O-LW65A Lens Cap for HD Pentax-DA 20-40mm f/2.8-4 Limited DC WR Lens
  • Pentax Rear Lens Cap (B) for Bayonet Mount Lenses
  • Lens Case
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