Sigma 19mm F2.8 DN 

Key specifications

  • 19mm focal length (38mm for MTF, 28.5mm for Sony E)
  • Moderate f/2.8 maximum aperture
  • Seven-bladed iris
  • Eight elements in six groups with three aspherical lenses
  • Weighs just 150g/5.3oz

Sigma uses three aspherical elements in this model and what it calls an 'inner focusing system' – two measures that aim to control field curvature and barrelling in what is essentially a very wide angle lens. Vignetting is a feature of images shot at apertures wider than f/5.6, but even wide open the fact that the corners of the frame are darker than the center will not be especially obvious, unless you are shooting a large flat-toned subject.  

ISO 200, F2.8, 1/8000sec, taken on a Panasonic Lumix DMC-GX7. Converted from Raw 'to taste'. At 38mm equivalent on an M43 camera, the Sigma 19mm is a nice focal length for everyday shooting - not too wide, not too long. On a Sony E-mount camera, 19mm becomes 28mm. 

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ISO 400, f/2.8, 1/5000sec taken on Panasonic GH4. Converted from Raw 'to taste'. Even at 38mm equivalent on an M43 camera, you can still separate your subject from its background (or foreground, in this case) when shooting wide open. 

Download original Raw file

ISO 800, F5.6, 1/2000sec, taken on a Panasonic Lumix DMC-GX7. Converted from Raw 'to taste'. At F5.6, this low-level grab shot is sharp from edge to edge. 

Download original Raw file

Sharpness is good wide open, but best - and most even - at around f/5.6. 

Sigma 19mm F2.8 DN lens gallery

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