Pentax Pentax K Prime

smc Pentax-DA 50mm f/1.8

50mm
f/1.8
Prime
122 g
Min focus 0.45 m

Quick answer

A light 50mm prime for Pentax APS-C bodies, weighing about 122 g. It takes 52mm filters and focuses as close as 0.45 m.

Pros

Light at about 122 g
f/1.8 aperture
52mm filters

Cons

APS-C only
Plastic build
Soft wide open

Verdict

A light portrait lens for Pentax crop bodies.

About this lens

Pentax smc Pentax-DA 50mm f/1.8: a fast standard prime lens with a 50mm focal length and a maximum aperture of f/1.8, made for Pentax K mount cameras. The natural field of view suits street, documentary and everyday photography.

Pentax smc Pentax-DA 50mm f/1.8 specifications

Brand: Pentax
Mount: Pentax K
Focal length: 50mm
Maximum aperture: f/1.8
Lens type: Prime
Format coverage: aps-c
Released: 2012
Optical construction: 6 elements in 5 groups
Minimum focus distance: 0.45 m
Maximum magnification: 0.15x
Filter thread: 52 mm
Weight: 122 g
Length: 38.5 mm
Diameter: 63 mm

Specification source: en.wikipedia.org

What can you shoot with the Pentax smc Pentax-DA 50mm f/1.8?

Portraits on APS-C
Low light
Light everyday prime

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

Does the Pentax smc Pentax-DA 50mm f/1.8 have image stabilization?

No. Pentax bodies stabilize the sensor, so shake reduction depends on the camera.

What filter size does it use?

The front thread measures 52mm, which is the size to look for when choosing a polarizer, UV or ND filter.

How close can it focus?

Minimum focus is 0.45 m, with a maximum magnification of 0.15x. That works for detail shots and small subjects, though it is not a dedicated macro unless stated.