Nikon D780 DSLR Camera (Body Only) - Manual (Page 836)

790 Technical Notes
D AF-S/AF-I Teleconverters
• The table below shows the focus points available for autofocus and
electronic rangefinding in viewfinder photography when an AF-S/AF-I
teleconverter is attached. Note that the camera may be unable to focus
on dark or low-contrast subjects if the combined aperture is slower than
f/5.6.
Teleconverter Max. lens aperture Focus points
TC-14E, TC-14E II,
TC-14E III
f/4 or faster
f/5.6
1
TC-17E II
f/2.8 or faster
f/4
1
f/5.6 — 2
TC-20E, TC-20E II,
TC-20E III
f/2.8 or faster
f/4
3
f/5.6 — 2
TC-800-1.25E ED f/5.6
1