Sunpak GT3 flash User manual

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H. IE EH EII T
INSTRUCTION BOOK
   SUNPAKN
   6TO

            SOLID STATE ELECTRONIC FLASH UNIT

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SPECIFICATION
Weight:                          approx. 4 ozs.
Light Covering Angle:           60
                                                                                           film.Color Quality:                      suitable for daylighi type color
Flash Duration:                                I /2,000 th second.
Recycling Time:               a) 5 - 8 seconds with zinc/carbon,
                              b) 4-8 seconds with alkaline.
Power Source'.            2 standard penlite batteries-zinc/carbon,
                                 NiCd Rechargeable.
                                   manganese alkaline 0r mercury batteries.
Flash capacity:             a) more than 40 flashes with zinc/carbon.
                              b) more than 200 flashes with alkaline.
                              c) more than 90 flashes with NiCd.
Guide Number:           28 (in feet) for ASA 25.
                     8 (in meter) for DIN 15.
                        56 (in feet) for ASA 100.
                                                1 6 (in meter) for Dl N 21  .

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Venmo @mike-butkus-camera  Ph. 2083
PayPal Name  Lynn@butkus.org      www.PayPal.me/lynnbutkus

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Mike Butkus   DigitallyDN:email=mike@butkus.org,Date:cn=Mike2026.02.23signedButkus,by19:58:32Mikeo, ou=Butkus.org,Butkusc=US-05'00'


                         Lenticular flash window.     G 0N -0F F switch                       f'
        @ St'p on shoe attachment         Q) ready lite.
        O PC synch'cord        @ exposure index.
                                                                                                           Pin.        @ Battery charge socket.          @flash test
        @ BatterY comPartment  lid'
                              --4*

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                 ATTACHING TO CAMERA AND TO SHUTTER
                      Mount unit 0n camera by sliding shoe attachment into
                       camera accessory shoe.
                        With unit securely mounted on camera, plug PC end into
                            flash terminal on camera.
                N0TE: Make certain that your camera shutter is set
                        for (X) synchronization, and at a shutter speed recom-
                       mended for electronic flash. lf several are recommended,
                        use the one of shortest'duration.
                        However, shutter speed has no bearing 0n exposure 0r
                           stop-action effectiveness. Both are determined by the
                   1/1000 the sec. flash duration.

                   INSTALLING BATTERIES
                       0pen battery compartment by pushing back the the lid. Compartment holds 2 penlite batter-
I'                             ies. lnsert batteries with relation to(*) and (-)  as shown on unit.
                NOTE:  lt is advisable to remove batteries where unit will not be used for extended
                                period.

                 BATTERY OPERATION
                             Slide 0N/0FF switch to 0N position. You will hear a sustained high-pitch "beep" indicating
                           that the unit is in operation. When the ready light begins to glow, the flash unit is ready to
                      be fired.                     -6-

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OPEN FLASH TEST
As for the open flash test, contact the top of the synchro
cord to the flash-test-prn, as shown right, and you can fire
it.

DETERMINING EXPOSURE
The correct lens aperture will be found on the guide table
adjacent to the distance from the unit to the subject.
lf, for example you are using ASA 25 film, photographing
a subject  I 0 feet away, this indicated lens aperture would
be f 2.8.
Another method to obtaining the correct f stop is the use of film guide numbers.
Dividing the guide number by the subject distance gives the numerical value of the f stop to
be used. ln the above example, using ASA 100 film the guide number would be 56. At 10
feet, the aperture would then be 56+ 10, or f 5.6.
                              -8-

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RECHARGING NICKEL.CADiIIUM BATTERIES
Use the accessory charger attachment available at your
camera dealer. Slip the tip of the cord into the "C harge"
receptacle on the side of the SUNPAK DC-3 flashhead and
insert the two prong plug into your AC outlet.
Afull charge requires 14 to 16 hours. You can check the
battery charge at the end of that period by disconnecting
the charger cord and switch to battery operation, then fir-
ing the unit by means of the flash test pin and observing
the recycling time. lf the ready-light glows again less than
8 seconds later, the batteries are fully charged.
NOTE: Do not store the unit with fully discharged batteries inside. Give it a full charge.
before storing for 4 weeks or more, and recharge for 2 to 4 hours every 4 weeks when
used infrequently or stored.
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