Nikon D500 Settings Manual page 12

The focus points available for autofocus and electronic
rangefinding when teleconverters are used in combina-
tion with different lenses are shown below (data are cur-
rent as of April 2016).
AF-S NIKKOR 400 mm f/2.8E FL ED VR and 70–200 mm f/2.8G ED VR II
• Alone or with TC-14E/TC-14E II/TC-14E III:
153 (55 selectable); 99 cross sensors
• With TC-17E II or TC-20E/TC-20E II/TC-20E III:
153 (55 selectable); 45 cross sensors
AF-S NIKKOR 500 mm f/4E FL ED VR
• Alone: 153 (55 selectable); 99 cross sensors
• With TC-14E/TC-14E II/TC-14E III:
153 (55 selectable); 45 cross sensors
• With TC-17E II:
37 (17 selectable); 25 cross sensors
• With TC-20E/TC-20E II/TC-20E III:
15 (9 selectable); 5 cross sensors with sup-
port for a combined aperture of f/8
12