A digital camera's image sensor is the biggest indicator of image quality, and while the Sigma SD Quattro H doesn't yet have a price or release date, it does have three sensors.
Most digital camera sensors have a filter with a pattern of red, green and blue that add color details to the light that the camera collects -- without that filter, the image would be in black and white. The Sigma SD Quattro H doesn't use that filter, but instead has one sensor for red, another for green and another for blue. That allows the camera to collect color information without the filter, which Sigma says helps to enhance detail. If the new tech behind Sigma's claims are true, the camera could boast impressive detail.
Those three sensors merged together create 25 megapixel RAW files that Sigma says offer the same quality as a much larger 51 megapixel sensor. While the sensor design is unique, it's also large. An APS-C sensor, the kind found in entry level DSLRs as well as many mirrorless cameras, is a 1.5x crop of a 35mm camera, but the Sigma uses a APS-H sensor which is a bit larger, offering a 1.3x crop factor instead.
While the sensor technology sounds impressive, the rest of the camera's specs seem just average. The burst speed is a rather low 3.6 fps, but that's likely due to processing the larger files from that sensor -- err, those sensors. The camera uses both a phase and contrast detection hybrid system, with nine autofocus points. The camera doesn't have a built-in flash, but a hot shoe slot allows users to add an external one.
Body-wise, the camera has a large grip, as well as both a 3" LCD screen and a secondary display for exposure details at the top of the camera. The camera is compatible with most of Sigma's lens line-up, the manufacturer says.
Sigma hasn't yet revealed a price or official release date for the SD Quattro H -- or for that matter, details on video capability (if any) and battery life. We'll wait for that price -- but the image sensor technology does look promising.