Manual focus

Focus can be performed manually when the focus mode selector is set to M (x 61).

AF start button

Pressing the AF start button automatically activates autofocus in autofocus operation (as does lightly pressing the shutter release button).

Autofocus operation on lens

Autofocus operation can be activated by pressing the AF-ON button on the AF-S VR 200mm f/2G IF-ED or AF-S VR 200-400mm f/4G IF-ED lens . For details, see the instruction manual of the lens.

CSM a4: Autofocus detection can be set to start by pressing the AF start button (rather than lightly pressing the shutter release button) (x 95).

In this case, you can lock the focus (x 58) by releasing your finger from the AF start button after focus is achieved.

CSM c3: AF start and AE/AF-L buttons can be set to operate in the following ways (x 100):

AF start button operates as AE/AF-L button and AE/AF-L button operates as AF start button.

AE/AF-L button operates as AF start button (function of AF start button remains unchanged).

AF start button operates as AE/AF-L button (function of AE/AF-L button remains unchanged).

Detailed Operation

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Nikon 1799 instruction manual Manual focus, AF start button, Autofocus operation on lens