Ultrablitz Cornet 220 electronic flash User manual

PAGE       CONTENTS

     2          Technical data
     4        Camera Connection
     5          Switching on
    5        Camera settings
     6         Lens stop computer and guide number
     7         Power switch
     7         Angle of illumination
      I           Battery charging
      I           A. C. operation
    10         H i-Voltage battery pack
     11          Further maintenance instructions - forming
    11          Automatic control system
    12          Service and guarantee

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    1 Sync cord
    2 Additional camera foot mount
    3 Camera foot
'    4 Power switch
    5 Readiness indicator lamp
    6  Selector switch
    7 Manual release button
       I  A.C. and charging plug socket
    9 Lens stop computer
   10 Sync cord roller

CAMERA CONNECTION
Attach the camera foot (3) at one of the two alternative points, according to
whether the flashlight is to be used horizontally or vertically.
The CORNE-l 220 is provided with a sync cord and foot contact. lt can there-
fore be connected to any make or type of camera and is invariably properly
synchronized.
ln the case of cameras with center contact (hot shoe), the flashlight is simply
slid into place.
With cameras having a conventional P. C. sync outlet, the sync cord (1) is
pulled out and connected to the X-contact. After use, the cord is rolled up
again with the aid of the knurled wheel (10).


NOTE
Betore uslng the flashllght for the lirst tlme,   Ithe llash capacltorulu., o" formed
and the battery re-cfrarged. Full details will be found on pages 8 and 11.

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SWITCHING ON
The selector switch (6) has three positions, i. e.
       B  Battery operation "On"
                 ff  "Oll" or, if connected to A.C. ,,Charger'
    -                510A.C.V operationbattery pack"On"operation(Forming)
when the readiness indicator lamp (5) lights up, the flashlight is ready for use.
With the selector switch in Position "B", d quiet high-pitched note will be
heard, denoting that the flashlight is in operation. Shortty after the readiness
indicatorlamp lights up, the high-pitched notewill be intermittently  interrupted
as the automatic control system takes over.

CAMERA SETTINGS
For between-lens shutters, any desired shutter speed may be used. Recom-
mended shutter speed is about ]/us sec.
In the case of focal plane shutters, the manufacturer's  instructions should be
consulted.         Most focal plane shutters are correctly synchronized at aboutl/ro-llso       SOC.

LENS STOP COMPUTER AND GUIDE NUMBER
The stop setting is ascertained from the formula:
                    Lens stop = Guide number: Dlstance
The correct stop setting for full power can be read off direct trom the lens
stop computer on the flashlight.  lt is necessary only to set the film speed to
the arrow. (Red figures apply to ASA numbers and feet).
Theguide number is thusdependent on the powerselected and thefilm speed.
ASA Film Speed                 |  12     25     50     100    200    400    800
Guide Number at Full Power I  40     58     80     116    160    232    320Guide number at Half Power |  29     40     58      80    116    160    232
The red scale of the computer shows aperture values for diapositives tq be
reproduced with 500 Watt projector. When using a less powerful lamp open
diaphragm by one more step.
However, exposure is also affected by other factors, such as the size and
brightness of the room, the brightness of the subject and certain properties
and characteristics  of the photographic equipment used. For this reason the
guide numbers and thus also the lens stop computerreadings  can be regarded
only as approximations, as defined in the German Standard DIN 19011.

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       POWER SWITCH
         The power switch (4) has two positions:
                            Full power = Symbol "O" visible
                           Half power = Symbol "O" visible
I       When using the flashlight at half power, the lens aperture should be opened
         one step more than that shown by the lens stop computer.
          Example: for 200 ASA; distance 20 feet, lens stop computer indicates  f 8.I                 At half power, the proper stop setting is f 5.6.


       ANGLE OF ILLUMINATION
I        The angles of illumination (58o horizontal and 50o vertical) of the coRNET 220
         are wide enough to illuminate the field of vision encompassed by a 35 mm
I         wideangle  lens.
          Aperture angle of a 35 mm lens for miniature picture size:
                         54o horizontal, 38o vertical (diagonal 640).

BATTERY CHARGING



Use only on A.C.!
Use a pointed object to set voltage selector switch of the A.C. adapter to
correct local voltage. lnsert cable plug in socket (8) of flashlight.
Upon connection to A.C. line, the battery is charged by setting the selector
switch to Position "ff  ". Charging  is terminated by withdrawing the A.C. plug.
The chemical composition  of an NC battery renders a reliable visual indication
of its charging condition impossible. The number of flashes used can be taken
as a useful guide.

                For every 10 flashes, re-drarge for 2 hours
After the flashlight has been in use, the battery should be re-charged imme-
diately in order to keep it at peak performance and maintain the flashlight
for instant use at all times.
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Any time the recycling period amounts to 30 seconds or over, the battery
should be given a 14-hour charge in any case. Should the battery at any
time be inadvertently discharged to such an extent that even a 14-hour charge
 is insufficient to restore the recycling time to about 10secs.,the chargeshould
be prolonged, but not for more than 60 hours. AtIer 2 to 3 discharges and
subsequent 14-hours charges, the battery will then regain its full capacity.
 lf satisfactory results cannot be obtained by charging ihe battery in the
flashlight, have it connected to a special charger at one of ourservice depots.





A.C. OPERATION
For A.C. operation, the switch is set to "'-".Any desired number of flashes
can be released after the readiness indicator lamp lights up. Here too, the
flashlight is switched off by withdrawing the A.C. plug.

Hl-voLTAGE BATTERY PACK (OPTIONAL)
The high voltage pocket-pack is designed to meet the demands of the pro-
fessional or serious amateur, by providing faster recycling (2 to 5 seconds on
full power) and delivery of sufficient flashes to cover the most prolonged
assignments. The pocket-pack  utilizes a 510V Eveready No.497 battery, or
equivalent.

lnstall 510 V Battery
Place contact block over battery terminals and puncture plastic seals.
Encircle contact block and battery with heavy duty rubber band, to ensure
positive contact.
Insert battery with contact block into carrying case.

Operation
Connect unit side plug to Cornet 220 outlet (8) and push switch on pocket-
pack to "ON" position.

NOTE
To obtaln maxlmum number of flashes from eadr 510 V battery, follow Instruc-
tions on "Forming" (see page 11).

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FURTHER MAINTENANCE INSTRUCTIONS  - FORMING
The best form of maintenance for an electronic flashlight ls ptenty of use.
 Especially the flash capacitors need electric current to keep them at the peak
 of their performance. Therefore, before using your flashlight for the first time
or if it has been left unused for a few weeks, please plug it into the A.c. outlet
for about 20 minutes with the switch in position " - " and release a fewflashes. This will effectively form the flash capacitors and maintain the flash.
 light at full capacity. The initial drain of the batteries will also be reproduceo
by following this procedure.
 lf the flashlight is lelt unused, please see also the instructions for battery
charging.
AUTOMATIC CONTROL SYSTEM
The function of the automatic control system is to keep the light output
constant from the first to the last flash and to ensure that the batteries are
used sparingly.
The automatic control system enables the flashlight to be left switched on
between shots, so that it is always ready for use. For longer intervals, hour-
ever, it should be switched olf.
The connection to the hi-voltage battery renders the automatic control system
inactive.

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SERVICE AND GUARANTEE

Your Cornet 220 is designed with the most advanced electronic principles.
Meticulous quality-control  in manufacture is followed by a rigorous  final
insoection.
P|ease read carefully the terms of your guarantee. To validate your guarantee,
fill out your registration card now and mail it without delay. Should yout
CORNET 220 tail to function properly at any time, send it to Allied lmpex
Corp., sole authorized importers for the United States, at the address nearest
you. Please pack it carefully, and include a brief description ol what is not
operating properly.
Your flash unit is guaranteed for six months, as described in the guarantee
packed with the unit. lf the unit is returned for repairs under the guarantee,
please enclose the guarantee card; otherwise repairs cannot be made with-
out charge.
For repairs within the guarantee, please enclose $ 1.50 to cover handling,
insurance and return postage.
For repairs not covered by guarantee, send no money; you will be sent an
estimate of the repair charge.

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is imported and guaranteed
in the United States exclusivelv bv                   *rya,ffi
ALLTED TMPEX CORPORATION                          ,:l
300 Park Avenue South, New York, N.Y., 10010



SERVICE STATIONS
Allied lmpex Corporatlon
300 Park Avenue South, New York, N.Y., 10010
3740 West Morse Avenue, Chicago, lllinois, 60645
1328 Motor Circle, Dallas, fexas,75207
5201 W. Jefferson Boulevard, Los Angeles, California 90016

Manufactured by Robert Bosch Elektronik GmbH . West Berlin  ' Germany
Subject to change      Printed in Germany     VKD-Fo 437 (085/6.5)