Sigma SD1 with 50mm, f/1.4
|Type||Digital single-lens reflex|
|Lens||Interchangeable (Sigma SA mount)|
|Sensor||23.5×15.7mm APS-C 1.5x crop (Foveon X3)|
|Maximum resolution||4704 × 3136 × 3 (44.3 million effective pixels, 14.8 megapixel output image size)|
|Storage||CompactFlash (CF) Type I (Not microdrive or CF Type II)|
|Focus modes||Single AF, Continuous AF (with AF motion prediction function) and Manual|
|Focus areas||11-point twin-cross AF|
|Image processor||True II Image processing engine|
|Rear LCD monitor||3 in (63 mm), 460,000 pixels|
|List price||$9799 USD|
The Sigma SD1 is a digital SLR camera produced by the Sigma Corporation of Japan. The camera uses a Foveon X3 sensor, which comprises 3 layers of 4800 x 3200 pixels (46 megapixels), giving much higher chromatic resolution than the equivalent Bayer array. It uses a Milbeaut image processor. The Foveon sensor does not use an aliasing filter, thus further improving the resolution.
Sigma SD1 Merrill
In February 2012, the SD1 was relaunched as the SD1 Merrill, honoring the late Richard B. Merrill, inventor of the Foveon sensor. With the relaunch, the price was dramatically cut, to a recommended price of US$3300 and a minimum advertised price of $2299. Sigma gave existing SD1 owners credit toward the company's lenses and accessories equal to the price cut.
Sigma Photo Pro
Postprocessing of raw X3F and JPEG of all digital SIGMA cameras
SIGMA Capture Pro
SIGMA Capture Pro for SD1 and SD1 Merrill: Free Remote Software for Laptop or PC
Version 1.0.1 (Windows XP (SP2 or higher), Windows Vista or Windows 7 or higher) und Mac User (Mac OS X Ver. 10.5 or higher)
Version 1.2.0 (Windows 7 or higher) and Mac User (Mac OS X Ver. 10.8 or higher) 
- "Sigma SD1 Price & Availability Announced". Retrieved 2011-05-24.
- "Sigma SD1 becomes SD1 Merrill and gains (much) keener price tag". Digital Photography Review. 2012-02-08. Retrieved 2012-09-13.
- http://www.sigma-sd.com/download/capturepro.html | actual Download Sigma Capture Pro 1.2.0
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