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(TTL) metering, you need not worry about adjusting the aperture. However, when
an independent exposure meter is used, slight adjustment is required, depending
on the focal length setting.
Diagram
1
4.5
6
£ 3.3
E
I =
35 50 70
*• Focal Length
FLASH PHOTOGRAPHY CARE
Follow the instructions below when you take pictures with the speedlight unit
because the maximum aperture ot this lens varies according to the focai length
settings.
• In TTL automatic flash photography (when using the SB 18, SB 17,
SB-16A/B, SB-15 or SB-20)
No adjustment is required because the variation in aperture is automatically
accounted for. However, when the flash-to-subject distance is close to either the
near or far limit of the auto shooting range corresponding to your working aper-
ture,
the working aperture may need to be changed as you zoom in or out.
• In non-TTL automatic or manual flash photography
Slight adjustment is required.
You
can obtain the roughly correct exposure over
all focal length settings by using the intermediate setting between the green
and brown aperture indexes. For perfect exposure, adjust the coupling
aperture according to Diagram 1.
• In combination with the speedlight SB-19 or SB-E mounted on the Nikon
FG-20 or EM
Make sure
to set the shooting mode selector of the
SB-19
or camera selector of a
new-type SB-E at the "A" position. With an older-type SB-E, set it to "FE- FM".
Otherwise, you can obtain the correct exposure only in the telephoto (70mm)
setting,
while your picture will be overexposed in the wideangle (35mm) setting
due to the change of the maximum aperture of this lens. With negative-type film
(for example, color negative film), this shift might not affect the picture
itself,
because it has a larger exposure latitude. But, it is not recommended to use
slide
film,
because it
has a
narrower exposure latitude.
(f3.9)
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