Pentax Pentax K Prime

DA 50mm lens

50mm
f/1.8
Prime
122 g

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Quick answer

The Pentax DA 50mm lens is a standard prime lens covering 50mm at f/1.8 for the Pentax K mount. Its fast maximum aperture helps in dim light and gives good subject separation.

About this lens

This 50mm f/1.8 fast standard prime lens from Pentax fits Pentax K mount cameras. The natural field of view suits street, documentary and everyday photography.

Pentax DA 50mm lens specifications

Brand: Pentax
Mount: Pentax K
Focal length: 50mm
Maximum aperture: f/1.8
Lens type: Prime
Format coverage: aps-c
Filter thread: 52 mm
Weight: 122 g
Length: 39 mm
Diameter: 63 mm

Specification source: wikidata.org

What can you shoot with the Pentax DA 50mm lens?

At 50mm this is a standard prime, which typically suits:

Everyday and street photography
Natural-perspective portraits
Documentary and travel work

Its fast maximum aperture helps in dim light and gives good subject separation.

Full-frame equivalent and field of view

Calculated from the focal length and crop factor. Not measured.

Sensor	Crop	Equivalent	Horizontal FOV	Diagonal FOV
APS-C	1.5x	75mm	27°	32.2°

Try the field-of-view calculator

Frequently asked questions

What mount does the Pentax DA 50mm lens use?

It uses the Pentax K mount, so it fits Pentax K cameras directly.

What is the focal length of the Pentax DA 50mm lens?

It is a fixed 50mm lens with a maximum aperture of f/1.8. That makes it a standard lens.

Is the Pentax DA 50mm lens a prime or a zoom lens?

It is a prime lens with a fixed 50mm focal length. Primes usually open wider than zooms; this one opens to f/1.8.

What is the Pentax DA 50mm lens equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 75mm on full frame, with a 27° horizontal and 32.2° diagonal field of view. These figures are calculated from the focal length and crop factor.