Sigma claims the DP2x is a digital SLR trapped inside a compact camera's body. At around £450, the fixed-focus DP2x isn't an impulse buy, but it certainly has some interesting features and unique qualities that will appeal to camera enthusiasts.
Design and features
The DP2x's plain, matte black design is something of an acquired taste. From the front it looks quite classy, but the back feels lumpy and outdated. The DP2x is somewhat larger than the average compact and heavier too, weighing 260g.
The fixed lens housing protrudes by a good 25mm when the camera is in standby. Switch it on and the lens extends to approximately 55mm in length. Even MC Hammer's generous pantaloons would struggle to accommodate this fellow.
Unlike your average point-and-shoot camera, the DP2x's controls are manual-centric. There's a proper mode dial, with program, aperture-priority, shutter-priority and full manual modes available. Manual focusing is also possible, although not via a lens ring. Instead a thumb dial on the rear is used.
Other unusually advanced offerings include support for raw capture and an active hotshoe, which can be used to attach an external flash or Sigma's optional electronic viewfinder.
Many of the standard features that casual camera users may have become accustomed to are either limited or absent altogether. The video mode, for example, records at a resolution so low (240p) that it's not really worth bothering with. As for face detection, pet modes, miniaturisation filters and the like, the DP2x just isn't that sort of camera. In fact, there's very little hand-holding of any kind, so, if you're new to photography, this may not be the camera for you.
Sensor and lens
The DP2x uses Sigma's own Foveon X3 sensor, a 14-megapixel version of the same APS-C sensor that powers the company's dSLRs. Not only is it much larger than the average compact sensor (20.7 by 13.8mm), the Foveon X3 also works in a very different way to normal CMOS chips.
Without getting too technical, the main difference is that the sensor is divided into three layers, with each layer dedicated to absorbing different wavelengths of light. This essentially allows the sensor to capture red, green and blue light equally across the whole sensor. It also means that, in theory, images require less processing.