2. D780 Online Manual
  3. Other Shooting Options
  4. Using Non-CPU Lenses (Non-CPU Lens Data)

Using Non-CPU Lenses (Non-CPU Lens Data)

Non-CPU lenses ( Compatible F Mount Lenses ) 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 qA (auto aperture) mode

    • Aperture is listed (with an asterisk) in the playback photo info display

  • Specifying both the focal length and maximum aperture of the lens:

    • Enables color matrix metering (note that it may be necessary to use [Center-weighted metering] or [Spot metering] to achieve accurate results with some lenses, including Reflex-NIKKOR lenses)

    • Improves the precision of [Center-weighted metering] and [Spot metering] and i‑TTL flash control

Teleconverters and Zoom Lenses

  • If the correct focal length is not available, for example because you are using a teleconverter or zoom lens, choose the next largest value.

  • The maximum aperture for teleconverters is the combined maximum aperture of the teleconverter and the lens.

Entering Lens Data

  1. Select Non-CPU lens data.

    Highlight [Non-CPU lens data] in the setup menu and press 2.

  2. Select a lens number.

    Highlight [Lens number] and press 4 or 2 to choose a lens number.

  3. Enter the focal length and aperture.

    Highlight [Focal length (mm)] or [Maximum aperture] and press 4 or 2 to edit the highlighted item.

  4. Save settings and exit.

    Press J. The specified focal length and aperture will be stored under the chosen lens number.

Recalling Non-CPU Lens Data

  1. Assign non-CPU lens number selection to a camera control.

    Assign [Choose non-CPU lens number] to a control using Custom Setting f3 [Custom controls].

  2. Use the selected control to choose a lens number.

    Press the selected control and rotate a command dial until the desired lens number is displayed in the control panel.

    1

    Focal length
    2

    Maximum aperture
    3

    Lens number
Zoom Lenses

Lens data are not adjusted when non-CPU lenses are zoomed in or out. The data for different focal lengths can be entered as separate lens numbers, or the data for the lens can be edited to reflect the new values for lens focal length and maximum aperture each time zoom is adjusted.