Pentax SMC Pentax DA 50-200mm f/4-5.6 ED WR Zoom Lens

Model #21870

USA Version
Pentax 21870 1
Pentax 21870 1
Pentax 21870 2
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Filter thread 49 mm
Weight 10.1 oz (286 g)
Dimensions (dxl) Approx. 2.7 x 3.1" (6.86 x 7.87 cm)


Diaphragm blades 6
Focal length 50 - 200 mm
Comparable APS-C Focal Length: 76.5 - 307 mm
Minimum focus distance 3.60' (1.10 m)
Magnification 0.24x
Maximum reproduction ratio 1:4.16
Angle of view 31.5° - 8.1°
Camera mount type Pentax K
Format compatibility Pentax Digital (APS-C)
Aperture Maximum: f/4.5 - 5.6
Minimum: f/22 - 32
Groups/elements 10/11


Tripod collar No
Autofocus Yes
Image stabilization No
User Reviews
B h photo.32817553
20 July 2015

This lens works very nicely when shooting wildlife with a Pentax K-50. I am amazed how well very tightly cropped photos hold up with this combination. Autofocus is sometimes an issue in some situations for me, but I am able to switch easily to manual focus to get the shot.I normally shoot RAW+jpeg.

12 November 2016

Was my first purchase for the K-5. Poor lens. Avoid! Avoid! Avoid! May be cheap but it's a false economy, as most of your shots will go in the bin. While contrast is ok, and CA and flare is not excessive, getting something sharp with this lens is rare to impossible, even stopped down.

  • +

    WR, price, size, useful focal range

  • -

    not fast, not sharp, poor bokeh

29 June 2014

Buyers, please be aware, as per another review, 'Another Deal Site' are providing cheap kit versions of this lens and not as advertised. Where the advertised lens retails for $250, the other lens only retails at $100 (Though is only meant to come with a kit).

26 March 2013

An exceptional lens for the money.

  • +

    Carries Well, Easy To Use, Hood Provided, Lightweight, Outstanding Image Qualit, Reliable, Weather sealed, Well Made

  • -

    Tendency To 'hunt'

Product Highlights
  • For Use in Pentax Digital SLR Cameras With KAF-mounts.
In The Box
  • Pentax SMC Pentax DA 50-200mm f/4-5.6 ED WR Zoom Lens
  • Lens Hood (PH-RBD49)
  • 49mm Front Lens Cap (31526)
  • Rear Lens Cap B
  • 1-Year Manufacturers Warranty
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