Nikon 1799 Digital Camera User Manual


 
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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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