Sigma 15mm f/2.8 EX DG Diagonal Fisheye review

The Sigma 15mm f/2.8 EX DG Diagonal Fisheye serves up a hugely wide viewing angle for Canon, Nikon and Pentax full-frame DSLRs

Sigma 15mm f/2.8 EX DG Diagonal Fisheye
(Image: © Matthew Richards)

Digital Camera World Verdict

You might need to look around to find a new sample of this recently discontinued lens there are plenty to be had in the second-hand market. It’s available in a variety of mount options for full-frame cameras, it comes complete with autofocus and camera-driven aperture control, with good handling characteristics. Image quality is nice and sharp and, as a ‘diagonal fisheye’, it delivers full coverage of the camera’s image sensor for regular, rectangular shaped images with that classic fisheye distortion, and a 180-degree viewing angle measured on the diagonal of the frame.


  • +

    Compact and lightweight

  • +

    Impressive image quality

  • +

    Protective integral hood


  • -

    Noticeable color fringing

  • -

    No weather-seals

  • -

    Mostly no AF motor

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Small and lightweight, the Sigma 15mm f/2.8 EX DG Diagonal Fisheye was manufactured in Canon EF, Nikon F and Pentax K mount options as well as for Sigma’s own cameras for many years. It’s full-frame compatible and naturally somewhat less effective on APS-C format bodies.


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Matthew Richards

Matthew Richards is a photographer and journalist who has spent years using and reviewing all manner of photo gear. He is Digital Camera World's principal lens reviewer – and has tested more primes and zooms than most people have had hot dinners! 

His expertise with equipment doesn’t end there, though. He is also an encyclopedia  when it comes to all manner of cameras, camera holsters and bags, flashguns, tripods and heads, printers, papers and inks, and just about anything imaging-related. 

In an earlier life he was a broadcast engineer at the BBC, as well as a former editor of PC Guide.