Non-CPU Lens

By specifying lens data (lens focal length and maximum aperture), you can gain access to a variety of CPU lens functions when using a non-CPU lens.

Available functions

If the focal length of the lens is known:

Automatic power zoom can be used with attached Speedlight

When the maximum aperture of the lens is known:

The aperture value is displayed in the top LCD panel and viewfinder . Auto Aperture flash can be used with attached Speedlights (x 155).

Specifying both the focal length and maximum aperture of the lens: Enables Color Matrix Metering (x 62).

Functions for improved accuracy

Specifying both the focal length and maximum aperture of the lens improves accuracy in: Center-Weighted and Spot Metering (x 63), i-TTL Balanced Fill-Flash* (x 150), Multi-Sensor Balanced Fill-Flash* (x 154).

*Set the metering system other than Spot.

Available focal length and aperture

Focal lengths:

6, 8, 13, 15, 16, 18, 20, 24, 25, 28, 35, 43, 45, 50, 55, 58, 70, 80, 85, 86, 100, 105, 135, 180, 200, 300, 360, 400, 500, 600, 800, 1000, 1200, 1400, 1600, 2000, 2400, 2800, 3200, and 4000mm

Apertures:

f/1.2, 1.4, 1.8, 2, 2.5, 2.8, 3.3, 3.5, 4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9.5, 11, 13,15, 16, 19, 22

Available non-CPU lens

Non-CPU lens data can be specified with AI Nikkor lenses. Non-AI lens does not function accurately even when the lens data are specified. To use non-AI lens, select a lens number in which no focus length and maximum aperture are specified.

Available focal lengths and apertures

If the corresponding focal length is not listed, choose the closest value greater than the actual focal length of the lens. If you are using a Speedlight in this condition, adjust the zoom head position manually.

Zooming with 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 the lens focal length and maximum aperture.

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Nikon 1799 Non-CPU Lens, Available non-CPU lens, Available focal lengths and apertures, Zooming with zoom lenses