Nikon 1799 Non-CPU Lens, Available non-CPU lens, Available focal lengths and apertures

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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