Something to fawn over

The glowering clouds above tell you that you might not have picked the best day to hike. But something about the imperfect weather seems to have brought the area wildlife out of hiding. In the clearing ahead you can see a mother deer with two fawns. Best not to spook them. Your Pentax DA 50-200mm f/4-5.6 lens will get you close enough for the perfect shot without encroaching on their space. And you'll be ready if the rain shows up, too. With weather-resistant, dust-resistant construction, this lens is the perfect companion to the Pentax K-5 weather-resistant digital SLR. Between the two, you'll have a combo that's built for bringing home the elusive shot under challenging circumstances.

While this lens is rugged, it has a sophisticated side as well. It's got a useful maximum aperture range of f/4-5.6, so it's ready for shooting in the great outdoors. Aspherical and extra-low dispersion glass elements, plus special Pentax coatings, make your images as sharp and artifact-free as they can be. The Quick-Shift focus system allows instant on-the-fly switching from auto to manual focus.

Product Highlights:

  • Pentax 50-200mm f/4-5.6 ED/AL telephoto zoom lens with 35mm equivalent of 76.5-307mm
  • compatible with Pentax K-mount digital SLR and hybrid cameras, especially the weather-resistant Pentax K-5
  • extra-low dispersion and aspherical glass lens elements correct chromatic aberration for excellent image quality and sharpness
  • tightly sealed, weather-resistant and dust-resistant construction enhances durability for use in both rainy and dusty conditions
  • responsive "Quick-Shift Focus System" allows photographers to instantly switch the focus mode from auto to manual
  • constructed of 11 elements in 10 groups
  • minimum focus distance: 43-1/4"
  • minimum aperture: f/22-32
  • filter size: 52mm
  • lens is 3-5/8" long, 2-3/4" in diameter
  • weight: 9.2 ounces
  • supplied accessories: front and rear lens caps
  • warranty: 1 year
  • Our 60-day money-back guarantee
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Hands-on research

What's in the box?

Download owner's manual

  • smc Pentax-DA 50-200mm f/4-5.6 ED WR lens (with attached front and rear lens caps)
  • PH-RBD 49mm lens hood (installed on lens)
  • Operating Manual
  • Notification of Change of Company Name sheet
  • Pentax Worldwide Service Network sheet
  • Serial Number Card

Features and Specs

Brand Compatibility Pentax
Image Stabilization No
Focal Length 50-200mm
Maximum Aperture F4 (W) -5.6 (T)
Weight 10.1 ounces
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Overview: The smc Pentax-DA 50-200mm F4-5.6ED WR is a 4x telephoto zoom lens for Pentax D-SLR and interchangeable lens cameras. It is weather-resistant for shooting in damp, inclement conditions.

Lens Mount: The lens has a KAF-mount, and can fit Pentax D-SLR and interchangeable lens cameras with KAF, KAF2 and KAF3 mounts. This includes the Pentax K-5 and K-01 cameras.

Zoom Ring: With the 50-200mm lens, zooming is performed by rotating the zoom ring (closest to the camera body). Markings are provided at 50, 80, 100, 135, and 200mm.

Lens Hood: The lens kit includes the PH-RBD 49mm lens hood to keep unwanted light out of the lens, and protect the front of the lens. The hood can be reverse-mounted on the lens for storage. When installed, the hood adds approximately 1-3/4" to the overall length of the lens.

ED Glass: The Extra-low Dispersion (ED) glass lens element and two aspherical lens elements offer superior sharpness with minimum chromatic and spherical aberration.


  • Focal Length: 50-200mm
  • 35mm Equivalent: 76.5-307mm
  • Lens Construction: 11 elements in 10 groups
  • Mount Type: KAF-mount
  • Maximum Aperture: F4-F5.6
  • Minimum Aperture: F22-F32
  • Maximum Magnification: 0.24x
  • Angle of View: 31.5° to 8.1°
  • Minimum Focus Distance: 3.6'
  • Lens Hood: PH-RBD 49mm
  • Filter Diameter: 49mm
  • Dimensions:
    • Diameter: 2.713"
    • Length: 3.584" (4.004" w/caps)
    • Weight: 10.1 ounces (11.3 oz w/lens hood)

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