Nikon 24-120mm-f-35-56G-ED-IF-AF-S-VR-Zoom - Manual (Page 18)

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Variable maximum apertures
Zooming the lens from 24mm to 120mm decreases the maximum aperture approx.
1-1/3 of an f/stop. For cameras with TTL metering, there is no need to adjust the
aperture. Likewise, for TTL auto flash photography with Nikon Speedlights, no
adjustment is required. When using a separate exposure meter or taking photographs
in the non-TTL flash mode, select the appropriate aperture value according to the
focal length setting as displayed on the camera.
Setting the aperture
Because this lens does not have an aperture ring, you must set the aperture on the
camera.
Taking flash pictures with cameras having built-in flash
When using the following cameras, check the focal length and shooting distance
before taking flash pictures to prevent vignetting since the light emitted from the flash
may be obstructed by the lens barrel.
Cameras Usable focal length / Shooting distance
F80-Series/N80-Series* 28mm / 2m (6.6 ft.) or greater
35mm or longer / No restriction
F70-Series/N70* 28mm / 3m (9.8 ft.) or greater
35mm or longer / No restriction
F65-Series/N65-Series*, 50mm / 1m (3.3 ft.) or greater
F60-Series/N60*, 70mm or longer / No restriction
F55-Series/N55-Series*
F50-Series/N50*
F75-Series/N75-Series*
35mm / 1.5m (4.9 ft.) or greater
50mm or longer / No restriction
Pronea 600i/6i* 28mm / 3m (9.8 ft.) or greater
35mm / 1m (3.3 ft.) or greater
50mm or longer / No restriction
D70 24mm / 0.8m (2.6 ft.) or greater
28mm or longer / No restriction
* Sold exclusively in the U.S.A.
･ Pronea S: Vignetting occurs at any focal length and shooting distance. Using this lens is
not recommended.