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Sample Photos from the Sigma DP2x Foveon Sensor Camera

The Sigma DP2x features the unique Foveon X3 sensor, the sensor has 3 layers of pixels, and is APS-C (DSLR) sized.

|  Sigma DP2x in Compact Cameras
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Sigma DP2x

The Sigma DP2x features a Foveon X3 sensor - this unique sensor features 3 layers of pixels on top of each other, meaning that every pixel on the sensor picks up Red, Green, and Blue colour information. The sensor is also APS-C sized, so should offer the same high image quality as Digital SLRs. We've taken a number of photos in the studio using JPEG and RAW settings to see how the camera performs under a variety of lighting conditions. You can view them here, more sample photos can be found in the full review of the Sigma DP2x.

Foveon X3 Direct Image Sensor

The image above (from Sigma's website) shows how the Foveon X3 sensor differs from every other sensor out there, with the Bayer sensor on the right - the only other sensor to differ in the pixel arrangement is the Fujifilm EXR sensor. More information on the Foveon X3 sensor can be found on the Sigma website here.

Sigma DP2x

Sigma DP2x Key Features:

  • 14 megapixel FOVEON X3 direct image sensor (2,652× 1,768× 3 layers)
  • SLR (APS-C) Size Sensor, 20.7mm x 13.8mm (slightly smaller than APS-C sized sensor (1.7x crop factor), larger than Micro Four Thirds), 3:2 aspect ratio
  • 24.2mm f/2.8 Lens, equivalent to 41mm
  • 2.5inch screen, 230k pixels
  • AFE Analog Front End
  • Improved Auto-Focus Speed
  • RAW (X3F) and JPEG Support
  • 3fps Continuous Shooting
  • Flash hot-shoe
  • Manual controls
  • Manual focus
  • Pop-up flash
  • RRP: £619
  • Lithium Ion Battery (250 shots)
  • Sigma Photo Pro 5.0
  • 113.3mm × 59.5mm × 56.1mm
Sigma DP2x Back

White Balance Performance:

Sigma DP2x Sample Photo Tungsten - Tungsten Lighting
Auto White Balance - Tungsten Light Tungsten Preset - Tungsten Light
Auto White Balance - Fluorescent Light Fluorescent Preset - Fluorescent Light
Auto White Balance - Fluorescent Light Fluorescent Preset - Fluorescent Light

ISO Noise Performance:

ISO50 - ISO800 are available in JPEG and RAW shooting, while ISO1600 and ISO3200 are available in RAW shooting only. JPEG shots come out as 2,640× 1,760 images that are between 1.7mb and 3.1mb, while RAW / X3F images are x and come out at between 12.9mb and 16.9mb. Click to view full size test images.

ISO50 ISO100
ISO200 ISO400
ISO800 Thumb ISO1600 - From RAW
ISO800 (JPEG) ISO1600, JPEG saved from RAW, default settings.
ISO3200 JPEG Saved from RAW  
ISO3200 JPEG Saved from RAW, default settings.  

RAW Images processed with Sigma Photo Pro 5.0: compared to JPEG images straight from the camera.

JPEG Photo (4.6megapixel, default size) JPEG from RAW (Auto adjust in SPP)
JPEG from RAW Double Size JPEG from RAW, enlarged in Photoshop
JPEG from RAW, Auto adjust, Saved as Double the size, making an 18 megapixel photo. JPEG from RAW, Enlarged in Photoshop, Some adjustment, making an 18 megapixel photo.

Read our full Sigma DP2x review, and if you have any questions you would like answering, please leave a comment below.

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I've always found Sigma/Foveons claims about their sensor resolutions to be disingenuous and an insult to my intelligence.

2,652 pixels x 1768 pixels is and always will be 4.6 megapixels. Just because they have 3 layers of photosensors doesn't mean that the pixel resolution (which I'm sorry, but is absolute) will magically triple.
Various reviews and tests have proved beyond doubt that Foveon sensors offer little advantage over traditional Bayer arrays, if any... even though it may intuitively seem otherwise.

It's akin to saying that film is 35mm film is actually (24mm x 36 mm) x 3, since the principle is the same. Colour film has three layers for capturing photons of different energies as well. That doesn't mean it has three times the resolution of black and white film of the same dimensions.

Whether deliberate or some marketing genius's idea, their 14MP claims are fallacious at best and deceitful at worst.

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To: Akshay_Jamwal

I suggest to investigate how the final image with Bayer sensors is created, first there is AA filter, then the data is averaged from many pixels and color/luma information is averaged. Your claims are only true when a BW resolution chart is in question. In color resolution charts 12 Mpixel cameras can not beat Foveon 2,652 pixels x 1768. Of course you get your pixels but they are not sharp and you get sharpening artifacts. Best test could be blue on red background texture. Bayer photographer must take this always account and use complicated techniques to cope with that. For example 5DII has only 5 mpixels of red sensors not 21 !!!

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