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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 FA 31mm f/1.8 Limited Lens

Code: 20210

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At a glance

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

Related Categories

Pentax HD FA 31mm f/1.8 Limited Lens

Find a Dealer |

Product options:

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

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

Code: 20210

Related Categories

Product options:

Code: 20210

At a glance

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

Related Categories

RICOH IMAGING manufacture professional imaging equipment and hold long standing brand heritage. With an extensive product range of digital SLRs and a large range of interchangeable lens systems such a medium format, full frame and APS-C sensor sizes. Further our range of compact cameras, binoculars and spotting scopes are suitable for a variety of indoor and outdoor activities via the Pentax series. Ricoh also pioneers a range of 360° imaging devices that encapsulate fully spherical scenes through the Theta series

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