Digital SLR camera incorporates 46 megapixel (4,800x3, 200x3 layers) 24x16mm APS-C X3 direct image sensor. SD1 is Sigma’s flagship digital SLR model housed in solid magnesium alloy body making it extremely lightweight with an overall nice feel and pleasant handling. Splash proof feature protects camera from effects of harsh weather conditions. Incorporating 24x16mm APS-C X3 direct image sensor, dual TRUE (Three-layer Responsive Ultimate Engine) II image processing engines and 46 megapixel sensor ensures that high resolution images are processed quickly with high definition and smooth and subtle graduation of color delivering an image size of approximately 35/45mp in raw/tiff files. This latest technology meets strictest standards and requirements of professionals and enthusiast photographers for all types of photography.