Nikon BC-7 User manual

Nikon
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2
NIKON FLASH UNIT BC-7 is the compact and light weight
and yet quite powerful flash unit, to fit the Nikon F camera.
FIG. 1
_I

FEATURES
The flash unit BC-7 makes electrical connection with the flash syn-
chronization terminal in the Nikon F, Nikon F Photomic, Photomic - T,
TN or FTN camera, only by fitting into the camera accessory shoe,
eliminating the need for connecting cord_
• It is provided with a three -way socket which permits the use of three
types of flash bulbs: S. C. bayonet base, miniature base (M2)
or AG-l (A ll-Glass ).
• When you insert a flash bulb into the socket, it charges the capacitor
instantaneously and automatically, thus avoiding drain of the battery.
• It is provided with test circuits for checking each flash bulb, charg-
ing of the capacitor, the synchronization circuit as well as connection
of the flash unit.
• The synchronization cord socket, provided besides, permits the US\!
of the unit for extension flash.
• The collapsible, fan-fold ty pe reflector a ffords compactness a nd great
facility for carrying about the unit.
3

"
SPECIFICATIONS
Flash bulb socket
Three-way type socket permits use of anyone of the following three
types of flash bulbs:
S_ Co Bayonet base
Miniature base (M 2)
AG-l (A ll -G las s)
Illuminating angle
Approx_ 65°
Tilt-back angle of the reflector (for bounce flash)
Click-stops at 0° (for general use), 30°, 60°, 90° and 120°
Power source
B-C type : The capacitor is automatica ll y charged by fitting a bulb
to the socket.
Battery to be used
15 V laminated dry battery (Eveready No_ 504 or the similar)
(This type battery is available on the market.)

Testing system
Checks the synchronization circuit, connection of the fl ash bulb and
charg i ng c ir cuit.
Connection to the camera
Direct, cord l ess connection to the fl ash terminal on the camera ac·
cessory shoe.
Synchronization cord socket
P. C. type socket is provided for connecting the cord fClr extension
flash.
Weight
Approx. 180 g (w ithout la minated battery )
5

NOMENCLATURE
FIG. 2 Thr ee ·way so ck et FIG. 3
s ho e Cordless contact
6

FIG. 4
Exposure
Calc
ul ator
Ejector
Char
ge testing button (white)
(to check for the corr
ec t
con nection of fl as h bulb)
7

8
LOADING THE BATTERY
Pushing downwards the rear cover
clip on the back of the unit, open
, the cover.
Insert th e lamina t ed battery 15V
(Eveready No. 504 or the simi.
l ar), into the unit, according to
the plus and minus symbo ls.
Loop the vinyl tape under the
battery to facilitate the removal
of the battery.
FITTING TO THE CAMERA
Slide in the foot of the flash unit
from the rear of the camera into
the - camera accessory shoe as far
as it will go, whe re the terminal
on the flash unit comes int o con·
t act secure ly wi th that on the
rear of the accessory shoe.
To detach th e unit, reverse the
above procedure.
It 'is convenient to fold up the reo
flector in mounting or di smount·
ing the flash unit. (Fig . 5)

I FIG. 5
9

10
CHECKING SYNCHRONIZATION CIRCUIT
Checking of the cir cuit shou ld be done before the camera is loaded
with the film.
1. Ti lt upwards the reflector, attached to the camera, to the position
for bounce flash as i ll ustrated. (Fig. 6 (a))
2.
Keep pushing the red button for 3-4 seconds.
Whi le pushing this button, depress the shutter release button on
the camera . (Fig. 6 (b))
If the inside test lamp glows instantly (visible through the back
cover of the flash unit), it indicates that the circuit is functioning
properly .
Note: If the test lamp does not light in this test, check the following:
• I
mperfect con t act of the terminals
• Drain of the battery
• Trouble in the capacitor
• Disconnection of the test lamp. etc .