Forgot Password
Pentax Camera Forums Home
Log in or register to remove ads.

Pentax Lens Review Database » Film Era Pentax K-Mount Lenses » FA Prime Lenses
HD Pentax-FA 31mm Limited F1.8 Review RSS Feed

HD Pentax-FA 31mm Limited F1.8

Reviews Views Date of last review
3 9,681 Mon April 25, 2022
Recommended By Average Price Average User Rating
33% of reviewers $1,089.55 5.00
HD Pentax-FA 31mm Limited F1.8

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

This modernized version of the iconic SMC Pentax-FA 31mm F1.8 Limited features updated HD coatings and rounded aperture blades.

HD Pentax-FA 31mm F1.8 AL Limited
©, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (A setting)
Automatic, 9 blades (rounded)
9 elements, 7 groups
Mount Variant
Check camera compatibility
Max. Aperture
Min. Aperture
AF (screwdrive)
Min. Focus
30 cm
Max. Magnification
Filter Size
58 mm
Internal Focus
Field of View (Diag. / Horiz.)

APS-C: 49 ° / 42 °
Full frame: 70 ° / 60 °
Dedicated pouch (P70-140)
Lens Cap
Dedicated metal push-on (O-LW65B)
Weather Sealing
Other Features
Diam x Length
65 x 68.5 mm (2.6 x 2.7 in.)
341 g (12.2 oz.)
Production Years
2021 to present (in production)
$896 USD current price
$1049 USD at launch
Engraved Name
HD PENTAX-FA 1:1.8 31mm AL Limited
Product Code
20220 (silver), 20210 (black)
User reviews
In-depth review
One aspherical element, one ED element, one high refraction low dispertion element. Rounded aperture from F1.8 to F3.5.

Black and silver

Screwdrive AutofocusBuilt-in HoodAperture RingAutomatic ApertureFull-Frame Support
Purchase: Buy the HD Pentax-FA 31mm Limited F1.8
In-Depth Review: Read our HD Pentax-FA 31mm Limited F1.8 in-depth review!

Add Review of HD Pentax-FA 31mm Limited F1.8 Buy the HD Pentax-FA 31mm Limited F1.8
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-3 of 3
New Member

Registered: February, 2022
Posts: 3
Lens Review Date: April 25, 2022 I can recommend this lens: No | Price: $1,068.00 | Rating: 1 

Pros: None.
Cons: All.
Sharpness: 1    Aberrations: 1    Bokeh: 1    Autofocus: 1    Handling: 1    Value: 1    New or Used: New    Camera Used: K-1ii   

This lens is an old, criminally overpriced, mediocre piece of glass that cannot be used during the day. I can think of no lens I've ever used whose reputation was so very, very, very far away from reality. If you are the kind of person who thinks that Chromatic Aberration is "Pixie Dust," then go for it. Otherwise: avoid.

EDIT: Due to a rather unfortunate number of hostile messages I've received about this review, I'd like to make myself a bit more clear. I am a high-volume professional wedding photographer who, since the beginning of 2022, has done nearly 35 weddings. 100% of my weddings are done outdoors, but there are times that I need something fast in order to shoot the interiors of limousines and helicopters as well. I bought this lens for my K-1, hoping it would complement my Panasonic/Leica 42.5 Nocticron that I run on my second body, and that the two in combination would allow me to replace the Pentax 24-70, which I have taken nearly 60,000 shots with in the past year. However, I did not purchase it for over one-thousand dollars in order to stop it down to achieve an acceptable result. I have used hundreds of lenses in my decades of photography, and this is the most absurdly overpriced, overhyped lens I have used, with results that are professionally totally unacceptable. I have been happy with the K-1, and the 24-70 has given me and my clients many good results. I have used the DA* 50/1.4, and it is a remarkably good lens. I have nearly 40 vintage M42/K lenses, all of which I have enjoyed using in one way or another. This lens is singularly disappointing, given its reputation and its astoundingly out-of-alignment price, and I stand by my abysmally low rating without any hesitation whatsoever. If you are a hobbyist who enjoys fiddling around with overpriced glass in order to achieve decent results, I am in no position to stop you. As someone who needs his gear to work well without any time for second-guessing, I can tell you that this is not that lens.

Senior Member

Registered: April, 2020
Location: Ferrara Italia
Posts: 117

1 user found this helpful
Lens Review Date: November 14, 2021 I can recommend this lens: No | Price: N/A | Rating: 9 

Sharpness: 9    Aberrations: 9    Bokeh: 10    Autofocus: 10    Handling: 9    Value: 10    New or Used: New    Camera Used: Pentax K1   

Used a few times but with great satisfaction. Just close the aperture a couple of stops and it becomes a wonderful lens.

Site Supporter

Registered: June, 2020
Posts: 77

2 users found this helpful
Lens Review Date: May 24, 2021 I can recommend this lens: Yes | Price: $1,111.10 | Rating: N/A 

Pros: Sharp enough, bokeh is nice when wide open
Cons: Vignettes under f2.8, some purple fringing below f3
Sharpness: 9    Aberrations: 8    Bokeh: 9    Autofocus: 9    Handling: 10    Value: 7    New or Used: New    Camera Used: Pentax K-1 II   

A brand new 20 year old lens. Must be knocked down a few stops to avoid pretty poor vignetting. Purple fringing is visible in high contrast areas, but not too bad even wide open, pretty gone after about three stops. Must use camera body switch to change into manual focus mode, you cannot just override the focus by turning the lens. If you want a prime wide angle for your K-1 then this does get you the best one available from Pentax, but still can't be used in the care-free way the state of the art D FA 50 1.4 can be. In return, it's not the size or weight of the 50 either.
Remember to update your firmware before use.
Add Review of HD Pentax-FA 31mm Limited F1.8 Buy the HD Pentax-FA 31mm Limited F1.8

All times are GMT -7. The time now is 04:20 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]