Sigma AF 24-70mm f/2.8 EX DG HSM (DX) - Review / Test Report - Sample Images & Verdict
Lens Reviews - Nikon / Nikkor (APS-C)

Sample Shots

The following sample shots were taken with a D300 and RAW-converted via CaptureOne 4.8.

Click on a thumbnail to view the original file (opens in a separate window).

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Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 70.0mm
Aperture: f/8.0
Exposure 1/320s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 24.0mm
Aperture: f/8.0
Exposure 1/500s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 40.0mm
Aperture: f/5.6
Exposure 1/1250s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 31.0mm
Aperture: f/8.0
Exposure 1/250s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 65.0mm
Aperture: f/4.0
Exposure 1/1600s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 70.0mm
Aperture: f/2.8
Exposure 1/3200s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 24.0mm
Aperture: f/4.0
Exposure 1/2000s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 24.0mm
Aperture: f/8.0
Exposure 1/640s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 70.0mm
Aperture: f/8.0
Exposure 1/500s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 24.0mm
Aperture: f/5.6
Exposure 1/640s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 70.0mm
Aperture: f/2.8
Exposure 1/3200s
Make NIKON CORPORATION
Model NIKON D300
ISO Speed 200
Focal Length 24.0mm
Aperture: f/4.0
Exposure 1/2500s

Verdict

On our FX test camera, the lens did not really show impressive performance, however on DX the results are a lot more solid and convincing.

Center and border sharpness is generally very good, but there's a visible drop in sharpness wide open and the extreme corners need smaller apertures to show good resolution.

Vignetting and CAs are very low and not really field relevant, except maybe CAs at 24 mm. The only real issue of the lens is it's unpleasing bokeh. If your intended primary usage is to shoot portraits or seperate the main subject from a blurred and smooth background, you should probably look elsewhere. However, if you can live with or work around this issue or if you shoot stopped down mostly and just need the speed to have more reliable autofocus, the lens is a rather attractive option for a DX camera.

Optical Quality:    
Mechanical Quality:
Price/Performance:
      
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