After a long wait, Sigma’s new flagship telephoto zoom in its Sport series lens has arrived. Michael Topham had the honour of giving it a workout

Product Overview

Overall rating:

Sigma 70-200mm f/2.8 DG OS HSM Sport

Product:

Sigma 70-200mm f/2.8 DG OS HSM Sport review

Manufacturer:

Price as reviewed:

£1,349.00
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Sigma 70-200mm f/2.8 DG OS HSM Sport review: Resolution, shading and curvilinear distortion

Resolution

Sigma 70-200mm f/2.8 DG OS HSM Sport MTF50 on Canon EOS 5DS R

The lens delivers a strong set of MTF results from our Image Engineering tests. Centre sharpness improves at all focal lengths by stopping the lens down from its maximum aperture to f/4 and f/5.6. Sharpness holds up well at f/8 and f/11, but does starts to drop off beyond this point. The sweet spot of sharpness across the frame is found around f/5.6, with the solid and dotted red lines indicating central and corner sharpness is superior at wider focal lengths than it is at full telephoto.

Shading

There’s a drop in illumination of around 1.4 stops in the corners wide open at 200mm, but this quickly reduces to 0.6 stops by stopping down to f/4. Users will find the fall off is more gradual and less abrupt at 200mm than it is at wider focal lengths. At 70mm, corners are a stop darker than the centre of the image at f/2.8, but this reduces to just 0.5 stops at f/4. This vignetting performance is overall fairly mild as opposed to severe.

Sigma 70-200mm f/2.8 DG OS HSM Sport @ 70mm, f/2.8

Sigma 70-200mm f/2.8 DG OS HSM Sport @ 70mm, f/4

Sigma 70-200mm f/2.8 DG OS HSM Sport @ 70mm, f/5.6

Sigma 70-200mm f/2.8 DG OS HSM Sport @ 200mm, f/2.8

Sigma 70-200mm f/2.8 DG OS HSM Sport @ 200mm, f/4

Sigma 70-200mm f/2.8 DG OS HSM Sport @ 200mm, f/5.6

Curvilinear distortion

As is typical of telephoto zooms, the lens exhibits minor barrel distortion at 70mm, which then turns to pincushion distortion around 100mm. Like the vignetting that’s produced at wide apertures, the level of curvilinear distortion isn’t a major concern about and is unlikely to be an issue for the majority of subjects this lens will be used for. If you’d like to produce distortion-free images, this is easy enough to correct for by shooting in raw and taking advantage of profiled lens corrections.

Uncorrected curvilinear distortion at 70mm, -0.7% TV SMIA

Uncorrected curvilinear distortion at 135mm, 1.3% TV SMIA

Uncorrected curvilinear distortion at 135mm, 1.5% TV SMIA

  1. 1. Sigma 70-200mm f/2.8 DG OS HSM Sport review: Introduction
  2. 2. Sigma 70-200mm f/2.8 DG OS HSM Sport review: Features
  3. 3. Sigma 70-200mm f/2.8 DG OS HSM Sport review: Build & Handling
  4. 4. Sigma 70-200mm f/2.8 DG OS HSM Sport review: Image Quality
  5. 5. Sigma 70-200mm f/2.8 DG OS HSM Sport review: Resolution, shading and curvilinear distortion
  6. 6. Sigma 70-200mm f/2.8 DG OS HSM Sport review: Verdict
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