LCD and Viewfinder
Canon 1D X has a Fixed Type 3.2″ LCD screen with a resolution of 1,040k dots. The Canon 1D X's 3.2″ screen is larger than average and its resolution is up to the class standarts.
1D X has a built-in Optical (pentaprism) viewfinder. The viewfinder has a coverage of 100% and a magnification ratio of 0.76x. 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 1D X can shoot continuously at max speed of 14 fps and has max shutter speed of 1/8000 sec.
Unfortunately 1D X doesn't have a built-in flash but it has a flash shoe for mounting external flashes.
Canon 1D X 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 1D X also features Face detection AF
where it intelligently detects the faces in the frame and locks the focus automatically.
With Canon 1D X, you can record your videos at a highest resolution of 1920 x 1080 at 30,25,24 fps and save in MPEG-4 and H.264 formats. Full HD resolution of Canon 1D X 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 1D X II which features 4K video recording.
1D X has a built-in Mono microphone and a None speaker. Canon 1D X also has a port for an external microphone so you can record high quality sound with the help of an external microphone.
Connectivity and Storage
Battery Canon 1D X is powered by battery which provides a shooting life of 1120 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 883 shots, Canon 1D X has a good battery life for its class.
Battery Life Comparison in Pro DSLR Cameras
Nikon D3X with its 4400shots is the model with longest battery life among Pro DSLR cameras. Check the comparison of Canon 1D X vs Nikon D3X or take a look at Longest Battery Life DSLR cameras list.
Canon 1D X Features Compared to Main Competitors
You can download Canon 1D X's User Manual here