Pentax announces three fast primes for K-mount: 31mm f/1.8, 43mm f/1.9, and 77mm f/1.8
Feb 25, 2021
Dunja Đuđić
Dunja Djudjic is a multi-talented artist based in Novi Sad, Serbia. With 15 years of experience as a photographer, she specializes in capturing the beauty of nature, travel, concerts, and fine art. In addition to her photography, Dunja also expresses her creativity through writing, embroidery, and jewelry making.
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Pentax has just announced three new lenses for its K-mount cameras. 77mm f/1.8, 31mm f/1.8, and 43mm f/1.9 are now available for preorders, they’re fast and pretty compact, so let’s jump straight in and see what they have to offer.
Pentax HD Pentax-FA 31mm f/1.8 Limited
The new 31mm f/1.8 is an AF lens made for full-frame Pentax K-mount cameras. of course, you can also use it APS-C models and get a 46.5mm equivalent focal length. It’s built from nine elements in seven groups, with a rounded nine-blade diaphragm.
Here are the full specs:
| Focal Length | 31mm |
| Maximum Aperture | f/1.8 |
| Minimum Aperture | f/22 |
| Lens Mount | Pentax K |
| Format Compatibility | Full-Frame |
| Angle of View | 70° |
| Minimum Focus Distance | 11.8″ / 30 cm |
| Maximum Magnification | 0.16x |
| Optical Design | 9 Elements in 7 Groups |
| Diaphragm Blades | 9 |
| Focus Type | Autofocus |
| Image Stabilization | No |
| Filter Size | 58 mm (Front) |
| Dimensions (ø x L) | 2.6 x 2.7″ / 65 x 69 mm |
| Weight | 12 oz / 341 g |
Pentax HD Pentax-FA 31mm f/1.8 Limited is ready for preorders at the price of $1,049.95. You can choose between two versions: black and silver.
Pentax HD Pentax-FA 43mm f/1.9 Limited
The Pentax 43mm f/1.9 is also designed for full-frame Pentax K-mount cameras. When you use it with APS-C cameras, it provides a 66mm equivalent focal length. It’s a nice, compact lens built from seven elements in six groups. It features an eight-blade rounded diaphragm, and it’s also an AF lens. Here are the specs:
| Focal Length | 43mm |
| Maximum Aperture | f/1.9 |
| Minimum Aperture | f/22 |
| Lens Mount | Pentax K |
| Format Compatibility | Full-Frame |
| Angle of View | 53° |
| Minimum Focus Distance | 17.7″ / 45 cm |
| Maximum Magnification | 0.12x |
| Optical Design | 7 Elements in 6 Groups |
| Diaphragm Blades | 8, Rounded |
| Focus Type | Autofocus |
| Image Stabilization | No |
| Filter Size | 49 mm (Rear) |
| Dimensions (ø x L) | 2.5 x 1.1″ / 64 x 27 mm |
| Weight | 5.5 oz / 155 g |
You can preorder the Pentax HD Pentax-FA 43mm f/1.9 Limited in black and silver at the price of $599.95.
Pentax HD Pentax-FA 77mm f/1.8 Limited
Last but not least, there’s also the Pentax HD Pentax-FA 77mm f/1.8 Limited. It’s ideal for portraits on both full-frame and APS-C cameras, with a 115.5mm equivalent focal length on the latter. It’s built from seven elements in six groups and features a rounded nine-blade diaphragm for nice, smooth bokeh.
Check out the specs:
| Focal Length | 77mm |
| Maximum Aperture | f/1.8 |
| Minimum Aperture | f/22 |
| Lens Mount | Pentax K |
| Format Compatibility | Full-Frame |
| Angle of View | 31.5° |
| Minimum Focus Distance | 2.3′ / 70 cm |
| Maximum Magnification | 0.14x |
| Optical Design | 7 Elements in 6 Groups |
| Diaphragm Blades | 9, Rounded |
| Focus Type | Autofocus |
| Image Stabilization | No |
| Filter Size | 49 mm (Front) |
| Dimensions (ø x L) | 2.5 x 1.9″ / 64 x 48 mm |
| Weight | 9.5 oz / 270 g |
Like the previous two lenses, the new Pentax 77mm f/1.8 is also available in black and silver. You can preorder it for $799.95.
Dunja Đuđić
Dunja Djudjic is a multi-talented artist based in Novi Sad, Serbia. With 15 years of experience as a photographer, she specializes in capturing the beauty of nature, travel, concerts, and fine art. In addition to her photography, Dunja also expresses her creativity through writing, embroidery, and jewelry making.
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