Nikon D7 100 can automatically focus when taking pictures with the display screen. Why can I only focus manually when taking photos with the viewfinder?

1, both display camera and viewfinder camera can focus automatically, and the principle is the same.

2. Auto focus must meet the requirements of turning on auto focus (AF) on the lens, and auto focus (AF) must be turned on on the fuselage. Both must be opened.

3. autofocus has a shortest focusing distance, which depends on your camera lens.