Nikon D780 DSLR Camera (Body Only) - Manual (Page 395)

349 Other Shooting Options
Non-CPU lenses ( 0 786) can be used in modes A and M , with
aperture set using the lens aperture ring. By specifying lens data
(lens focal length and maximum aperture), the user can gain
access to the following CPU lens functions.
• If the focal length of the lens is known :
- Power zoom can be used with optional flash units
- Lens focal length is listed (with an asterisk) in the playback
photo info display
• If the maximum aperture of the lens is known :
- The aperture value is displayed in the control panel and
viewfinder
- Flash level is adjusted for changes in aperture if the flash unit
supports q A (auto aperture) mode
- Aperture is listed (with an asterisk) in the playback photo info
display
Using Non-CPU Lenses (Non-CPU Lens
Data)