Nikon F4 User Manual
Page 180
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The Nikon autofocus SLR system is designed based on
the premise that any of its components, such as the F4,
F-801/N8008*. F-501/N2020**, F-401s/N4004s**, AF Nikkor
lenses, TC-16A Autofocus Converter, Nikon speedlights
and Nikon accessories will be used integrally, with one
another.
AF Nikkor lenses electronically communicate all the
necessary information required for perfect operation
within current and future Nikon autofocus SLR systems.
Nikon does not assume responsibility if malfunctions or
damage occurs to the F4 when lenses and/or accesso
ries of other makers are used with it. For these reasons,
we recommend the use of AF Nikkor lenses and Nikon
system accessories.
* Exclusively sold in U.S.A.
** Exclusively sold In U.S.A. and Canada
Nikon cannot be held responsible for any malfunction
resulting from the use of the camera other than as
specified in this manual.
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The shutter cannot be released while camera back is
open. If for some reason you need to release the shutter
with the camera back open, consult a Nikon service
facility. Also, be sure to set the shutter speed to 1/250
sec. or higher; do not set to 1/125 sec. or slower.