Digital compact camera series sigma dp sensor size 23 5 x 15 7 mm display size 3 inch effective pixels 29 megapixel sensor type foveon x3 image processor dual truepic iii display type lcd display pixels 920 000 lens construction 11 elements in 8 groups focal length 14 photo focal length 35mm equivalent 21 mm aperture 4 20 maximum lens speed 4 light sensitivity iso 100 6400 photographic shutter speed 30 12000 sec colour depth 36 bit resol