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Sigma's DP1s digital camera. Photo provided by Sigma Corp. Sigma announces DP1s compact
(Monday, October 5, 2009 - 18:23 EDT)

Sigma has announced the forthcoming release of an update to its existing DP1 digital camera, which features a Foveon X3 image sensor and fixed focal length lens.

The new Sigma DP1s is near-identical to its predecessor in terms of hardware specification, using a 0.98-inch, 4.7 effective megapixel Foveon X3 image sensor, a wide angle 28mm-equivalent lens with f/4.0 maximum aperture, and Sigma's previous generation 'TRUE' (or 'Three layer Reponsive Ultimate Engine') image processor. The company has only described two differences between the new DP1s and previous DP1 cameras.

The first is a firmware change which allows the DP1s' digital zoom buttons to be mapped so as to provide a Quick Set function, as seen on the newer Sigma DP2 and SD15 cameras. Sigma also describes performance of the camera when shooting backlit subjects as having been improved, but hasn't said exactly what this entails. If internet speculation is correct, the IR cut filter may have been altered to prevent an unusual flare-like defect that can sometimes occur in DP1 images containing a bright point light source, such as the sun, a candle flame or similar. Several examples can be seen by searching on Flickr - in the linked search, the 'Ballyholme Beach' and 'La croix d'Asnière' photos show it particularly prominently. At the current time we have no official information on whether the change relates to this issue or not, nor whether the change for backlit subjects mentioned by Sigma has been made in hardware or firmware.

The Sigma DP1s is expected to be available by the end of October 2009, and pricing has not been disclosed at this time. For more details, read our Sigma DP1s preview.

Sigma DP1s
Camera TypeMid-Sized
Model NumberDP1s
Dimensions4.5 x 2.3 x 2.0 in.
(113 x 60 x 50 mm)
Weight9.8 oz
(278 g)
Planned AvailabilityOctober 2009
Image Capture
Sensor TypeFoveon X3 CMOS
0.98 (approx. 0.98 in. diagonal)
4.80 megapixels (total)
4.64 megapixels (effective)
Filter TypeFull Color
Aspect Ratio3:2, 16:9
Image Dimensions2640 x 1760 (4.6 megapixels)
2640 x 1485 (3.9 megapixels)
1872 x 1248 (2.3 megapixels)
1312 x 880 (1.2 megapixels)
Image Quality4 levels
Image Preview / Review
LCD2.5 in. diagonal
230,000 dots (approx. 77,000 pixels)
98% field of view
Lens TypeSigma Lens (6 Elements in 5 Groups)
Image StabilizationNo
Focal Length16.6mm (actual)
28mm (35mm equivalent)
Aperture Rangef/4.0 - 11
Focusing System9-point contrast detection
Does not have AF assist lamp
Manual focus possible
Focusing RangeNormal: 20" - infinity (50 cm - infinity)
Macro: 12.2" - 4,082" (30 cm - 10,000 cm)
ISO SensitivityAuto (100 - 200), Flash (100 - 400), 100, 200, 400, 800
Shutter Speed15 - 1/2000 second
Exposure ModesAperture, Shutter, Manual
Metering ModesEvaluative, center-weighted average, spot
Exposure Compensation+/- 3.0EV in 1/3EV increments
White BalanceImage Sensor - Auto, Sunlight, Shade, Overcast, Incandescent, Fluorescent, Flash, Custom
Internal FlashGuide Number: 6
Modes: Anti red-eye, Auto, Fill-in, Slow Sync, Off
Range: ISO 200: 30cm to 2.1m
Digital Zoom3.0x
Self TimerYes, 2 or 10 seconds
Movie FormatAVI with audio
Recording MediumSD/MMC including SDHC
File SystemComplies with Design Rule for Camera File System (DCF)
File Format12-bit RAW (.X3F), JPEG (EXIF 2.21)
VideoStandard definition: Yes, NTSC / PAL switchable
ComputerUSB 2.0 High Speed
OtherAudio out (monaural)
Battery TypeLithium-ion rechargeable
Battery Form FactorProprietary BP-31
Product Bundle
SoftwareSIGMA Photo Pro
Battery / Charger1 x Proprietary BP-31 Lithium-ion rechargeable battery and charger
Digital Print Order Format (DPOF) compliantYes
Internal MicrophoneYes
Internal SpeakerYes
Tripod MountYes, Metal
Remote ControlNo
NotesOptional accessories include: Optical View Finder VF-11, Hood Adapter HA-11, SAC-3 AC Adapter, Electronic Flash EF-140 DG

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