Sigma sd Quattro H

26MP APS-H Foveon X3 Quattro sensor | Hybrid AF system | Weather-sealed

What we like:

  • Impressive resolution and detail
  • Uses universal DNG Raw format
  • Excellent build quality

What we don't:

  • Very noisy at high ISOs
  • Exposure preview not always accurate
  • Large for a mirrorless camera
The sd Quattro H is the larger-sensor version of the Sigma's SA-mount interchangeable lens camera. It uses the unique Foveon Quattro technology but can produce DNG files, which opens up the ability to process images in popular third-party Raw editing software.
The Quattro H is a large and unusually-shaped camera but it fits well in the hand, allowing for stable shooting. The interface is straightforward and decently responsive, and the menus are fairly simple.
There's no apparent loss of quality in using the camera's DNGs, which opens up the use of a faster processing software
On-sensor phase detection means the Quattro H can focus any of Sigma's SA-mount lenses but the performance level makes it better suited to landscape or posed portraiture, rather than events or sports. The camera is reasonably responsive but its write times, particularly in DNG mode, are relatively slow.
The Quattro H produces phenomenal resolution at base ISO but this advantage of Foveon technology is countered by limited dynamic range and very poor high ISO performance by modern standards. There's no apparent loss of quality in using the camera's DNGs, which opens up the use of a faster processing software.
The Quattro H is a rare contemporary camera in that it does not shoot video. This further emphasizes its position as a camera suited to a narrow range of tasks.
The sd Quattro H is a specialized tool that suits a very specific range of shooting situations. If this fits with your needs, it makes an esoteric but interesting option.

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