LCD and Viewfinder
Canon 5D MIII has a Fixed Type 3.2″ LCD screen with a resolution of 1,040k dots. The Canon 5D MIII's 3.2″ screen is larger than average and its resolution is up to the class standarts.
5D MIII has a built-in Optical (pentaprism) viewfinder. The viewfinder has a coverage of 100% and a magnification ratio of 0.71x. 100% coverage ensures that what you see in the viewfinder while shooting matches exactly what you will get later in your image, helping accurate framing your shots and minimizes the need for cropping images later.
Max Shutter speed
Canon 5D MIII can shoot continuously at max speed of 6 fps and has max shutter speed of 1/8000 sec.
Unfortunately 5D MIII doesn't have a built-in flash but it has a flash shoe for mounting external flashes.
Canon 5D MIII features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 61 focus points and 41 of these sensors are of Cross-type. Cross-type sensors locks focus faster and more accurate compared to single type sensors.
Canon 5D MIII also features Face detection AF
where it intelligently detects the faces in the frame and locks the focus automatically.
With Canon 5D MIII, you can record your videos at a highest resolution of 1920 x 1080 at 29.97,25,23.976 fps and save in and H.264 formats. Full HD resolution of Canon 5D MIII will be adequate in most of the situations. But if you are after the highest resolution videos available, see our list of Top Cameras with 4K (Ultra-HD) Video. You can also consider its successor, the Canon 5D MIV which features 4K video recording.
5D MIII has a built-in Mono microphone and a Mono speaker. Canon 5D MIII also has a port for an external microphone and a headphone port for connecting external headphones which make Canon 5D MIII a very suitable camera high quality videography.
Connectivity and Storage
You can connect 5D MIII to compatible devices via its HDMI port or USB 2.0 (480 Mbit/sec) port.
Battery Canon 5D MIII is powered by battery which provides a shooting life of 950 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 883 shots, its battery life is about average in its class but it would still be wise to invest in some spare batteries for long photo trips.
Battery Life Comparison in Semi-Pro DSLR Cameras
Nikon D850 with its 1840shots is the model with longest battery life among Semi-Pro DSLR cameras. Check the comparison of Canon 5D MIII vs Nikon D850 or take a look at Longest Battery Life DSLR cameras list.
Canon 5D MIII Features Compared to Main Competitors
You can download Canon 5D MIII's User Manual here