Nikon D7100 Cell Phone User Manual


 
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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:
Power zoom can be used with optional SB-910, SB-900, SB-800, SB-700, and SB-600
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 AA (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 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