Nikon Df User Manual page 185

3
Enter the focal length and
aperture.
Highlight Focal length (mm) or
Maximum aperture and press
4 or 2 to edit the highlighted
item. Focal length can be
selected from values between 6 and 4000 mm, maximum
aperture from values between f/1.2 and f/22.
A
Focal Length Not Listed
If the correct focal length is not listed, choose the closest value
greater than the actual focal length of the lens.
A
Teleconverters and Zoom Lenses
The maximum aperture for teleconverters is the combined
maximum aperture of the teleconverter and the lens. Note that
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.
4
Choose a meter coupling
method.
Highlight Exposure meter
coupling and press 2, then
press 1 or 3 to highlight AI
lens and press J to select
(choose Non-AI lens only if the
lens is not equipped with an AI
mechanism; 0 167).
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