The camera was revised as the DP1s and the DP1x.
Unlike the Polaroid x530, the DP1 had an APS-C-sized sensor with a 28mm equivalent prime lens. A revised version of the prototype was exhibited in 2007, and the camera was eventually launched in spring 2008. Sigma announced a prototype of its Foveon-based compact camera in 2006, the Sigma DP1, using the same 14 MP sensor as the SD14 DSLR.
The camera had a limited release in 2005 but was recalled later in the year for unspecified image quality problems. announced the Polaroid x530, a compact camera with a 1408 × 1056 × 3, 1/1.8-in. The Sigma SD1 was released in June 2011 with a new 23.5×15.7mm APS-C 4800 × 3200 × 3 (15.36 × 3 MP) sensor developed for the professional market. The SD14's successor, the Sigma SD15, was released in June 2010 and used the same 2640 × 1760 × 3 sensor as the SD14. The camera was followed in 2003 by the improved but technically similar Sigma SD10, which was in turn succeeded in 2006 by the Sigma SD14, which used a higher-resolution, 2640 × 1760 × 3 (4.64 × 3 MP) sensor. It used a 20.7 × 13.8 mm, 2268 x 1512 × 3 (3.54 × 3 MP) iteration of the sensor and was built on a Sigma-designed body using the Sigma SA mount. The first digital camera to use a Foveon X3 sensor was the Sigma SD9, a digital SLR launched in 2002. However, because the collection depth of the deepest sensor layer (red) is comparable to collection depths in other silicon CMOS and CCD sensors, some diffusion of electrons and loss of sharpness in the longer wavelengths occurs. The depth of the silicon wafer in each of the three sensors is less than five micrometers that creates a negligible effect on focusing or chromatic aberration.
In practice, the color attributes of each output pixel using this sensor result from the camera's image processing algorithms, which use a matrix process to construct a single RGB color from all the data sensed by the photodiode stack. The sensor colors shown are only examples. The image on the right shows a layered sensor stack depicting the colors it detects at each absorption level for each output pixel. The image on the left shows the absorption of colors for each wavelength as it passes through the silicon wafer. The diagram to the right depicts how the Foveon X3 sensor works. Wavelength-dependent absorption in silicon and the Foveon X3 sensor.
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