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The heart of the SD1 Merrill is its sensor, which uses Foveon technology. According to Sigma, a Foveon sensor provides a better image than the sensors in other digital cameras, which use a color filter array (CFA) - a mosaic of red, green and blue pixels in a checkerboard-like grid overlaying the image sensor. The Foveon sensor employs direct imaging involving three separate layers of pixels, one each in red, green and blue. This results in the Foveon sensor being able to capture more color information. Further, the absence of the grid system means the camera does not require the low pass anti-alias filter used in cameras with CFA sensors, which should further improve the image. Sigma claims that, due to its use of Foveon technology, the 15.6 megapixel APS-C X3 sensor of the SD1 Merrill is the equivalent of a 46 megapixel sensor. To interpret the information produced by its Foveon sensor, the SD1 Merrill uses two TRUE (Three layer Responsive Ultimate Engine) II processors, and to move this information to memory the SD1 Merrill requires a fast Compact Flash memory card rather then the SDHC cards used in most DSLRs. The result should be outstanding image quality. Other than these factors, the SD1 Merrill appears to be a conventional mid-level DSLR, with some features that work well and are very useful, but with some curious omissions and some annoyances.Read our Full Review of the SIGMA SD1 Merrill
» Sigma 105mm f/2.8 Macro Lens Review (Nikon mount)The Sigma 105mm f2.8 macro lens receives our highest praises for being a fantastic lens for both traditional and macro photography.Read More
» Sigma 18-35mm f/1.8 Lens Hands-On First Look PreviewThe announcement of the Sigma 18-35mm f/1.8 lens stirred up quite a reaction. Want to know how it performs? We have your preview here.Read More
» Sigma dp Quattro: New Cameras, New Foveon X3 SensorSigma just announced a new set of cameras to go with their new Foveon sensor. No price has been determined. Take a look. These cameras have a very unique appearance.Read More
» Sigma 50-150mm f/2.8 ReviewZoom lenses that provide a fixed 2.8 aperture are wildly popular, and this Sigma 50-150mm looks like a great deal for the price...but does it deliver?Read More
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