Nikon D810 Product Manual - Page 447
The AF-S/AF-I Teleconverter, Accessory, Maximum aperture of lens, Focus points, TC-14E, TC-14E II
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A The AF-S/AF-I Teleconverter 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 Maximum aperture of lens Focus points TC-14E, TC-14E II, f/4 or faster TC-14E III f/5.6 1 f/2.8 or faster TC-17E II f/4 1 TC-20E, TC-20E II, TC-20E III TC-800-1.25E ED f/5.6 f/2.8 or faster f/4 f/5.6 f/5.6 -2 3 -2 1 1 Single point AF is used when 3D-tracking or auto-area AF is selected for AF-area mode (0 90). 2 Autofocus not available. 3 Focus data for focus points other than the center focus point are obtained from line sensors. 423