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Sigma 50-200mm f/4-5.6 DC OS HSM review

Small but feature-packed, this Sigma zoom lens aims to go large on value for money

Build quality and handling

Sigma 50 200mm f 4 5 6 dc os hsm

For such a small and lightweight lens, the build quality of the Sigma 50-200mm f/4-5.6 DC OS HSM feels quite robust and, unlike the Nikon Nikkor AF-S DX VR 55-200mm f/4-5.6G IF-ED, the mounting plate is metal rather than plastic. There's no hint of zoom creep, and the zoom ring has a smooth action throughout its entire range.

The focus ring is quite large, which is a bonus for manual focusing, but it rotates in autofocus mode. The upshot is that, when holding the camera and lens naturally, it's easy to foul the action of the focus ring with your fingers. At least there's a focus distance scale printed on the front edge of the focus ring, which is often lacking in budget lenses.

Performance

Sigma 50 200mm f 4 5 6 dc os hsm

Optical quality in terms of sharpness is the opposite of Nikon's competing 55-200mm VR lens. The Sigma 50-200mm f/4-5.6 DC OS HSM is more typical of telephoto zooms, delivering sharper images at its shorter and mid-range focal lengths. At the maximum telephoto setting, sharpness drops off noticeably, especially at larger apertures of f/5.6 to f/8.

On the plus side, vignetting is kept well under control, and the lens produces plenty of contrast even in dull lighting conditions. Barrel distortion is a little noticeable at the 50mm end of the zoom range, as is pincushion distortion between 135-200mm.

The optical stabiliser is well worth having, although it only gave a 3-stop advantage in our tests, falling a little short of Sigma's 4-stop claim.

Sample image:

Sigma 50 200mm f 4 5 6 dc os hsm

Taken at 200mm, f/5.6

See full-res image

Tech Specs

Product TypeLens
Maximum Focal Length200 mm
Minimum Focal Length55 mm
Maximum Aperture Wide4
Maximum Aperture Tele5.6
Brand NameSigma
Filter Attachment Diameter55 mm
Lens TypeTelephoto Zoom
Application/UsageCamera
Minimum Focus Distance1.10 m
Diameter71.5 mm
Depth87.1 mm
Compatibility

Pentax D-SLR Cameras

Magnification0.22x
ManufacturerSigma Corporation
Product Model684945
Product Name55-200mm F4-5.6 DC Telephoto Zoom Lens
Manufacturer Part Number684945
Manufacturer Website Addresshttp://www.sigma-imaging-uk.com
Marketing Information

This compact telephoto zoom lens was exclusively designed for digital SLR cameras featuring APS-C size image sensor. The image circle was designed to match the size of the image sensors of digital SLR cameras that also allows compact body and lightweight.

Weight (Approximate)310 g