LCD and Viewfinder
Sigma SD1 has a Fixed Type 3" LCD screen with a resolution of 460k dots. Both the screen size and the screen resolution is up to the standards of this class.
SD1 has a built-in Optical (pentaprism) viewfinder. The viewfinder has a coverage of 96% and a magnification ratio of 0.64x. 96% coverage means that what you see in your viewfinder while shooting will slightly be different from the actual image.
Max Shutter speed
Sigma SD1 can shoot continuously at max speed of 5 fps
and has max shutter speed of 1/2000 sec
SD1 has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Sigma SD1 features a Phase Detection autofocusing system. The AF system has 11 focus points and 2 of these sensors are of Cross-type. Cross-type sensors locks focus faster and more accurate compared to single type sensors.
Unfortunately Sigma SD1 doesn't have Video recording ability.
Connectivity and Storage
Sigma SD1 has a USB 2.0 (480 Mbit/sec) port to connect your camera to other devices.
Sigma SD1 Features Compared to Main Competitors