Nikon F3 Manuale di istruzioni - Pagina 40
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-ACCESSORIES-continued-------------
Speedlights
Designed to complement the versatility of the
F3,
the
Nikon
SB-12
is a direct-mounting
electronic
flash unit
offering
fully automatic through-the-Iens flash
output
control.
Even with the
camera on
automatic, the proper
synchronization speed of 1/80 sec.
is
automatically set.
Then, while the
shutter
is
open,
the
camera's
Silicon
Photo Diode reads the light
reflected off
the film
and tells
the flash unit to
cut
itself
off
when
the exposure
is
correct
.
With
a guide
number
of 25 (ASA
100
and
meters)
or
40
(ASA 25 and
feet),
the
SB-12
Speedlight provides just
the
right amount of light for subjects located between 0.6m-
15m
(2ft-49ft).
As soon as the flash is recycled and ready
to fire,
an
LED
ready-light
inside the finder
goes on. The
40
same
LED
blinks to let
you
know when the light is
insufficient for
proper exposure.
And for those photographers needing
even
more power
and versatility,
Nikon has
created
the
SB-ll Speed
light.
It has
a gUide
number
of 36
(ASA 100
and
meters)
or
60
(ASA 25 and feet) and gives you a choice of
three
auto-
matic
shooting
apertures-
I/4, £/5.6, and £/8
at
ASA 100.
When
used with the F3 via a special
TTL
connecting
cord,
it
provides
the
same automatic
through-the-Iens
control of
the flash
exposure as
the SB-12.
Other
features
include
a
bounce
head and a
removable
sensor
for
auto-
matic use with
other cameras
.