Pentax smc DA 50mm f/1.8 Lens

Model #22177

USA Version
Pentax 22177 1
Pentax 22177 1
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Filter thread Front: 52 mm
Dimensions (dxl) Approx. 2.5 x 1.5" (6.35 x 3.81 cm)
Weight 4.3 oz (122 g)


Aperture Maximum: f/1.8
Minimum: f/22
Magnification 0.15x
Focal length 50 mm
Comparable APS-C Focal Length: 76.5 mm
Angle of view 31.5°
Camera mount type Pentax K
Diaphragm blades 7
Groups/elements 5/6
Format compatibility 35mm Film / Full-Frame Digital Sensor
DSLR (APS-C Sensor)
Minimum focus distance 1.48' (45.11 cm)


Autofocus Yes
Image stabilization No
Tripod collar No
Expert Reviews
4 October 2012

This standard 50mm lens sports a fast f/1.8 maximum aperture, ideal for blurring backgrounds, or for shooting in low light conditions. However, unlike many 'nifty-fifty' lenses, this optic carries a rather high £250 price tag. Is it worth the extra over equivalents from other manufacturers?

User Reviews
B h photo.32817553
25 September 2015

Honestly, the 50mm lens is a must for a photographer and at a price around $100, this lens is a spectacular deal. It's crisp, sharp, clear, and inexpensive. The autofocus is a little slow and the housing of the lens is less then professional, but for a lens that is only $[$], it's definitely worth...

  • +

    Consistent Output, Lightweight, Nice Bokeh, Value

  • -

    Slow Focus, Weak Casing

5 December 2013

Great little lens. It's very light, fast, and sharp (when stopped down a tiny bit). Got this for everyday photography, but 50mm is a bit to narrow of a focal point although excellent for portraits. So, 35mm is on the wish list. The AF is also a bit on the loud side.

  • +

    Consistent Output, Excellent IQ, Fast, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Sharp

  • -

    Somewhat Loud Af

2 January 2015

It matches well with my Pentax K-01. It's size is right and the image is pleasing with good balance of sharpness and colour saturation. However, its a bit noisy during focusing.

Product Highlights
  • Very Fast f/1.8 Maximum Aperture
  • Excellent Low-Light Lens
  • Pleasing Bokeh (Out-of-Focus Areas)
  • SP Coating Repels Dust, Water, Grease
  • For APS-C & Full-Frame K-Mount Cameras
Average Expert Score
Average User Score
In The Box
  • Pentax smc DA 50mm f/1.8 Lens
  • Front and Rear Lens Caps
  • 1-Year Limited Warranty
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