Specifications
Sensor Foveon X3 direct image CMOS sensor (23.4 x 15.5mm); 29.5MP on three layers, max image size 39.3MP
Lens mount Sigma SA
Memory SD/SDHC/SDXC
Viewfinder Electronic viewfinder, 2,360,000 dots
Max video resolution N/A
ISO range 100-6,400
Autofocus points 9
Max burst rate 3.7fps
Screen 3-inch TFT, 1,620,000 dots
Shutter speeds 1/4,000 sec to 30 sec, Bulb
Weight 625g
Dimensions 147 x 95 x 91mm
Power supply BP-61 lithium-ion battery (supplied)
The sd Quattro’s fine detail rendition is exceptional. Sadly, its high-ISO performance is startling in a very different way Sigma’s Quattro sensor mimics traditional film, recording colour using different layers of silicon rather than with the mosaic or red, green and blue photosites used by regular sensors. The top layer records luminance and blue data at 19.6MP resolution, while…