Non-CPU Lenses

Non-CPU 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 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

ATeleconverters 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.

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