Site Title

Pentax HD Pentax-FA 31mm F1.8 Limited Full-Frame Lens (2021)

MSRP 950 USDNeo score 50%

Product Gallery

Photo 0of Pentax HD Pentax-FA 31mm F1.8 Limited Full-Frame Lens (2021)Photo 1of Pentax HD Pentax-FA 31mm F1.8 Limited Full-Frame Lens (2021)Photo 2of Pentax HD Pentax-FA 31mm F1.8 Limited Full-Frame Lens (2021)Photo 3of Pentax HD Pentax-FA 31mm F1.8 Limited Full-Frame Lens (2021)

Product Overview

Pentax HD Pentax-FA 31mm F1.8 Limited is a wide-angle prime lens for Pentax K-mount. It covers the full-frame image circle. Introduced by Pentax in 2021, it has 9 elements in 7 groups.
Unfortunately, Pentax has opted to omit weather sealing for this lens, so owners should pay extra attention when shooting in incremental weathers. On the lens barrel, one can find a physical aperture ring. Those who wish to focus manually can have the best of both worlds (with the usual caveats).
The bright maximum aperture for a wide-angle lens is appreciated for night photography, though some may prefer the perspective of an ultra wide-angle lens for this. Even though the lens is not stabilized, at this focal range it does not usually matter. In fact, some may be able to get cleaner corners without image stabilization.

<

>

X

Ratings

What we found**

Neo score 50% (not directly comparable across industries)
Pros
  • Comes with physical aperture ring
  • Beautifully built
Cons
  • Only f/1.8 for the price
  • Lacks weather sealing
  • Unusual focal length

Price Comparison (incl. referral links)*

Specifications

Construction

Aperture Blades
9 blades
Colors
Black, silver
Form Factor
Wide-Angle Prime Lens
Image Size
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Pentax K-mount
Material
Aluminum
Motor
Screw drive from camera
Optical Formula | Elements
9 elements
Optical Formula | Groups
7 groups
Optical Formula | Special Glass
HD + Super Protect coatings groups

Dimensions

Filter Diameter
58 mm / 2.28 in
Size | Diameter
65 mm / 2.56 in
Size | Length
69 mm / 2.72 in
Weight
341 g / 12.05 oz

Function

Angle Of View
69.9° Diagonal | 60.3° Horizontal | 42.3° Vertical
Aperture
f/1.8 ~ f/22
Autofocus
Yes
Focal Length
31 mm
Focus Type
Internal
Image Stabilization
No
Weather Resistance
No

Performance

Max Magnification
0.16x
Min Focus Distance
300 mm / 11.81 in

Production

Accessory
Lens hood included
Debut
2021-02-24

Related Products

Thumbnail of Laowa 12mm f/2.8 Zero-D Full-Frame Lens (2016)

Laowa 12mm f/2.8 Zero-D Full-Frame Lens (2016)

Neo 50%Ext 74%
Thumbnail of Samyang 20mm F1.8 ED AS UMC Full-Frame Lens (2016)

Samyang 20mm F1.8 ED AS UMC Full-Frame Lens (2016)

Neo 59%
Thumbnail of Laowa 20mm F4 Zero-D Shift Medium Format (44x33) Lens (2022)

Laowa 20mm F4 Zero-D Shift Medium Format (44x33) Lens (2022)

Neo 75%
Thumbnail of Pentax HD Pentax-D FA 21mm F2.4ED Limited DC WR Full-Frame Lens (2021)

Pentax HD Pentax-D FA 21mm F2.4ED Limited DC WR Full-Frame Lens (2021)

Neo 76%
Thumbnail of Laowa 15mm f/4 1:1 Macro Full-Frame Lens (2015)

Laowa 15mm f/4 1:1 Macro Full-Frame Lens (2015)

Neo 50%
Thumbnail of Sigma 35mm F1.4 DG HSM | Art Full-Frame Lens (2012)

Sigma 35mm F1.4 DG HSM | Art Full-Frame Lens (2012)

Neo 74%Ext 63%
Thumbnail of Laowa 25mm f/2.8 2.5-5X Ultra Macro Full-Frame Lens (2018)

Laowa 25mm f/2.8 2.5-5X Ultra Macro Full-Frame Lens (2018)

Neo 31%Ext 83%
Thumbnail of Pentax HD PENTAX-D FA 15-30mm F2.8 ED SDM WR Full-Frame Lens (2016)

Pentax HD PENTAX-D FA 15-30mm F2.8 ED SDM WR Full-Frame Lens (2016)

Neo 31%
Thumbnail of Samyang 10mm F2.8 ED AS NCS CS APS-C Lens (2013)

Samyang 10mm F2.8 ED AS NCS CS APS-C Lens (2013)

Neo 40%
Thumbnail of Pentax HD Pentax DA 15mm F4 ED AL Limited APS-C Lens (2013)

Pentax HD Pentax DA 15mm F4 ED AL Limited APS-C Lens (2013)

Neo 59%
Thumbnail of Samyang 12mm F2.8 ED AS NCS Fisheye Full-Frame Lens (2014)

Samyang 12mm F2.8 ED AS NCS Fisheye Full-Frame Lens (2014)

Neo 40%Ext 89%
Thumbnail of Samyang 24mm F1.4 ED AS IF UMC Full-Frame Lens (2011)

Samyang 24mm F1.4 ED AS IF UMC Full-Frame Lens (2011)

Neo 59%

User Reviews

Neofiliac places the utmost respect for your privacy. We use no cookie whatsoever beyond that needed for the proper functioning of the website.

The MSRP provided on this page may not apply to all regions equally. For the current price, please refer to the Price Comparison section.

*This page contains affiliate links to third-party merchants such as Amazon, eBay, and Rakuten. When you make a purchase using the supplied links, we will receive a commission.

**Neo score is the calculated by our AI using advanced models based on the features and qualities of each product. Scores are not directly comparable across industries.

Comments

Please login before adding comments.