Pentax announces three fast primes for K-mount: 31mm f/1.8, 43mm f/1.9, and 77mm f/1.8

Tips & Techniques

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.

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