Non-cpu lenses – Nikon D300 User Manual

Page 222

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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

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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.

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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.

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