Nikon FR Instruction Manual page 11

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the batteries are exhausted or none are loaded in the
camera. The "M90" setting also serves as a
known·
shutter speed when shooting with electronic flash. At
the "8" setting, the shutter remains open as long as the
shutter release button is depressed
.
"8" is also a me-
chanical shutter speed, so there is no battery drain when
shooting time
exposures.
To conserve battery power
when making really long time exposures, use a cable
release and then push the film-advance lever back in
flush with the camera body after opening the
shutter.
Note that the 125 setting is engraved in red; this indi-
cates 1/125 second, the fastest shutter speed available
for synchronization with electronic flash
units.
(Refer to
page 37 for additional information on flash
photogra-
phy.)

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