Nikon Nikon Df Product 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 t lens and press J to select (choose Non-AI lens only if the lens is not equipped with an AI mechanism; 0 167). 165