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Non-CPU Lenses
By specifying lens data (lens focal length and maximum aperture),
the user can gain access to a variety of CPU lens functions when
using a non-CPU lens.
If the focal length of the lens is known:
• Automatic power zoom can be used with SB-900, SB-800, and
SB-600 Speedlights (available separately)
• Lens focal length is listed (with an asterisk) in the playback photo
info display
When 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
• 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 or spot metering to achieve accurate
results with some lenses, including Reflex-Nikkor lenses)
• Improves the precision of center-weighted and spot metering
and i-TTL balanced fill-flash for digital SLR
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 Zoom Lenses
Lens data are not adjusted when non-CPU lenses are zoomed in or out.
After changing the zoom position, select new values for lens focal length
and maximum aperture.