Illustration, not a product photo.
Pentax HD FA 50mm f/1.8
Overview
The Pentax HD FA 50mm f/1.8 is a full frame 50mm f/1.8 prime lens for the Pentax K mount. It weighs about 122g and takes 49mm filters.
It's a strong choice for portraits. Around 85mm equivalent with a fast aperture (f/1.8 or brighter) for background blur.
In our database it fits 7 camera bodies natively. Approximate new price is £199; MPB had none in stock when checked.
Specifications
| Brand | Pentax |
| Mounts | Pentax K (First-party) |
| Coverage | Full frame |
| Focal length | 50mm |
| Equivalent on Full frame | 50mm |
| Equivalent on APS-C (×1.5) | 75mm |
| Maximum aperture | f/1.8 |
| Focus | Autofocus |
| Stabilisation | No |
| Weather sealing | No |
| Weight | ≈122 g |
| Filter thread | 49 mm |
| Approx. new price | £199 |
| Used at MPB (Pentax K) | None listed |
Compatible camera bodies
7 native
Alternatives to compare
Where to buy
*Used prices on this site come from MPB on 5 November 2026. MPB only lists what it has bought in, so "None listed" means none in their stock that day, not that Pentax HD FA 50mm f/1.8 is hard to find. Check these trusted UK dealers too.
See example photos
Real-world shots taken with the Pentax HD FA 50mm f/1.8 lens. Results are searches on each site, so check the camera or lens listed in each photo's details.
Frequently asked questions
Which cameras is the Pentax HD FA 50mm f/1.8 compatible with?
It's available for Pentax K. Native bodies here include Pentax K-1 Mark II, Pentax K-3 Mark III, Pentax K-1, Pentax KP, Pentax K-70, Pentax KF.
Is the Pentax HD FA 50mm f/1.8 weather sealed?
No, it has no weather sealing; protect it in rain.
Does the Pentax HD FA 50mm f/1.8 have image stabilisation?
No. Use a camera with in-body stabilisation (IBIS) for steady hand-held shots.
What is the Pentax HD FA 50mm f/1.8 best for?
Portraits. Around 85mm equivalent with a fast aperture (f/1.8 or brighter) for background blur.