Nikon D750 User Manual page 458

A
AF-S/AF-I Teleconverters
The table below shows the focus points available for autofocus and
electronic rangefinding 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. Autofocus is not
available when teleconverters are used with the AF-S VR Micro-Nikkor
105mm f/2.8G IF-ED.
Accessory
TC-14E, TC-14E II,
TC-14E III
TC-17E II
TC-20E, TC-20E II,
TC-20E III
TC-800-1.25E ED
1 Single-point AF is used when 3D-tracking or auto-area AF is selected forAF-area mode
(0 123).
2 Autofocus not available.
3 Focus data for focus points other than the center focus point are obtained from line sensors.
430
Maximum aperture of lens
f/4 or faster
f/5.6
f/2.8 or faster
f/4
f/5.6
f/2.8 or faster
f/4
f/5.6
f/5.6
Focus points
1
1
— 2
3
2
—
1