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Ascorlight Series 600 User manual
User manual for Ascorlight Series 600. 26 pages in English. Read the original PDF, download or print a copy without registration.
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- Brand
- Ascorlight
- Model / document
- Ascorlight Series 600
- Document type
- User manual
- Language
- English
- Pages
- 26
- File size
- 4.8 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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www.butkus.uso
)
F
Welcome to the ascorlight Familyr
W€, the designers and manufacturers of your new ASCORLIGHT,^A.T 'take this opportunity to congratulate you on your selection. We
are confident that this purchase of your ASCORLIGHT unlt wilI
result ln your being another nember of the large familv of
satisfied ASCORLIGHT users.f
ASOR has long stood for the best in electronic flash. The
Company (starting as Parker & Young and the trademark Fotoluxp^ in tS46, changing to American Speedlight Corporatlon in 1948)
has, from the beginning, specialized in building the most ad-
vanced types of speedllghts for exacting professionals.
At- We realize that you, as a satisfied user, will be one of our
most valuable assets and potentially one of our best salesmen.
Therefore, we have prepared this manual to acquaint you with and^ assist you to get the most out of the advantages whlch we havef
built into your ASCORLIGHT.
Since your particular application maJ be somewhat dlfferent
generalr, from that of others, it is difficult to include enough information to help solve al] varied problems. We invite you to
write us about your particular problems, questions, complaints
or suggestions. Together, through an active exchange of ideas,
we can all Iearn to use today's equipment more effectively, and
iIt*_t To help us know you and neet our obligations to you, please
filI out and nail the enclosed reeistration-suaranteeregistration- guarantee cardcard rynow
^ It will put your guarantee into effect and enable us to periodi- Dcally send you the most up-to-date information on the applica-
tion of ASCOR equipment--equlpnent we are proud to sell, and
you wlll be proud to use.
Slnserely,
AMERICAN SEEDLIGHT CORPORATION.
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o
€
o
2. ASEOT GUARANTEE €
o
All ASCOR equipment, when properl.v registered is guaran_ rya teed against defects iffinship for a period of ninety (90) days, provided it has not been sub- jected to abnormal usage. o slecial components, such as nickel cadmium batteries, read acid batteries and capacitors (see guarantee card) are guaran- teed for longer periods. e
under this guarantee, our obrigation is limited to repair- ing or replacing the equipment at our option, provided it is returned, prepaid, to the factory. This does no1 include bat_ o teries or tubes.
guarantee Ttris is in guarantees, 1ieu of all other inplied @ expressed, or and no representative or person is authorizedor allowed to assume for the American sleedright corporation
any obligation not in accordance with the above. -
ltris guarantee does not apply to any instrument which has [:fl
been tampered with in any way, or which has the serial number E{t
removed, altered or effaced. E.-v
o
IMPORTANT
@
This guarantee is not valid until the registry card hasbeen returned to American speedright brporation, oi-or Metro- apolitan Avenue, Middle Village 29, N. y. MAIL AT ONCE.
@
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www.butkus.usa 3. FOREWORD
l Boiling the Mystery Out
of Speedlightingr^
By HARRY L. PARXE]R, pres. American Speedlight Corp.
Prlnted in Photographic Trade News, May 1gbb.t
*\{ The tremendous number of speedliehts (electronic flash; in all
shapes, sizes, and prices that have been, are and will be on the
market, sometimes leaves even the electronic flash engineer con-
F tused. With all the claims, counter-claims, and partial informa-
tion, a few simple facts that can be used as a basis of comparison
or evaluation are needed.
7t The typical first approach to speedlights is to use guide
nunbers and let it go at that. However, there are two serious
faults in using guide numbers. First, high guide nunbers can be -.f achieved by concentrating the available Iight in a narrow bean from the reflector. The result, however, is uneven coverage or
{'hot spotso. Second, with a given speedlight, guide numbers can
lV6" honestly chosen over a very wide range. In black and white,1 depending on the fiIm, method of development, latitude of film,
etc., guide numbers of 6 to 1 could be chosen. One could have
: the film go through standard photo finishing, but even here there (-it a wide latitude, particularly with some of the new film.
Even with color film, lt is well known that variations in
llProcessing cal give changes of over plus-or-minusone full f/stop.f This would mean a difference in guide numbers of 2 to 1.
rl
Kodachrome, with its standardized processing, has been sug-ta 'F'-gested as the basis for color guide numbers. Even here, the
L- conditions of tahing and viewing cen result in good photogra-
phers giving guide numbers of about one stop difference. Let's
/Asay that a manufacturer gives a'lniddle of the road" r guide number of 40. On a test strip using all f/stops,Kodachromeit is
common for qualified photographers to choose exposures that give
numbers ranging from 35 to 56. I^Euide
lbe point is this--don't get too excited or misled by a small
numerical difference in guide numbers. Most of you have heard
FheateA discussions over eolor gulde number differences of only r lO% to l5%. The chances are that ratings of, saV, 40 or 45, rep-
resent an honest difference of opinion of the persons selecting
^the?'I 'best'. Both could be within the range of acceptability.
Page 1
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IMPORTANT RATINGS
Fbr too long most peoplehave rated speedlightsinratt seconds. a Just what is a watt-second? If you really know, you are one of the
unusual photographers. Then again, wtrat photographer really cares?
Watt-seconds is not a rating of Iight output of speedlight equip- ment. The use of watt-seconds, microfarads, and other terms have n
so confused thephotographer that many are thoroughly baffled about
electronic flash.
Speedlight has already established itself as a major photo-
graphic Iient source and will continue to grow in spite of this
confusion. If we consider for a moment the purpose of speedlieht,
we realize that its whole function is to produce light of proper
quality to take pictures. When you get down to basic factors, the
points of comparison should be:
(1) Photoeraphic effectiveness of the light
(2) Operational requirements
(3) Dependability
(4) Oost. www.butkus.us
Speedlight is just light. It can be used wtth the sarne photo-
graphic lightine effect as any other type of lignt source. It is
daylight quality (constant, cool and clean;. It can be emphasized
that this gives a daylieht source that can be controlled any time,
anywhere. Ihe points that determine the photographic effectiveness
and what the photographer needstoknow about any light source are:
(1) Strength of lisht.
(2) Slor of lieht.
(3) Ooverage of the refLector.
(4) Speed of the flash or exposure.
In addition to these, the user of a speedlight also needs to
know the recharge or recycling time of his equipment.
Knowing these things is important, frrovided a standard term and
method of measuring is used in arriving at the figures. The need
for establishing standards for electronic flash has been recog-
nized by many of the Leaders in photographic engineering, and a
project was set up by the Committee on Standards of the Society of
Photographic [hgineers. A questionnaire was sent out to a large
number of people concerned with electronic flash and the answers
were collated. The definitions agreed upon by ttre majority were
collated. The definitions agreed upon by the majority of those
replying were written up as proposed standards, and the intention
of the S.P.E. Committee on Standards was, and is, to submit the
results of this survey to the American Standards Association for ^their consideration.
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www.butkus.uso the results of the survey, the general agreement that carne out of it, and the fact that many of the speedlig;ht manufacturers are
now giving data based on these definitions, indicate that theseo definitions and terms may werl become standard by common usage.
STRENGTH OF LIGHT AND COVERAGEo The definitions agreed to by tlre majority are:
The recognized unit of measure for the strength of a light source is the candle power. photographicalry, *" u"6 concerned noto only with the strength of the light but also the time. The sum of the light energy, during a period of time, is therefore measured in candle power seconds lequivalent to the light of one candle power strength acting for one second's time). when measuring ao lignt source on the bean of the reflector, the tenn is referred to
as Bearn Candle power Seconds (abbreviated B.C.p.S.).e rt is possible to concentrate arl the avairabre lieht on the bearn and get a very high rating guide number or bearn on the but ..hot have an unusable spot,,. recognizing In ap_ this, the first proach in standardizing definitions required that measurements beo averaged over a specified zone and the resulting average was re- power ferred toas Effective ca.ndle seconds (B.c.p.s. proved This l. be somewhat to cumbersome and difficurt to measure trre in field.e
fire eurrent thinking is that the rating for lighting effective-
ness be included in one rating which witl give both the strengtho of the ligi,t and the coverage. such a rating appries onry to re- flectors which have a smooth coverage with no otjectionable .,hot
spots". This rating gives the Bean Candte power Sjconds (BCpS) and the Angle of coverage and is shown as follows: 2000 gcFslodoo This means 2000 Beam candle power seconds as measured on the bearn or axis of the reflector and a coverage of 60 degrees as definedt^ below. Numerically, on a good type reflector, tne eCpS will be .I different from previously measured ECFS by only about !0/, nore. Therefore data still giving BCpS can be used ior your starting te sts. I SPEEDL IGHT PO INTERS
Make sure you know the strength of light, reflectoro coverage and flash speed.
Ihen compare similar units.n Base dependability on your experience, the unit,s reputation and the manufacturer, s guarantee.o pmgare prices, considering factors such as flex_ ibility, synchronization, etc., that add value with_ out greatly increasing cost.n
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SPEED OF FLASH
|^ Defined as length of time between the times wtren the intensity
of the light is more than I/3 of the peak intensity. This helps
evaluate the action-stopping ability and the reciprocity failure
effect in the film. (Fig. 2,),n
7
n
7
L
U M /\t\t\
^ E
N s /\t) FIGTJRE 2r illll
aPrfrvER-tn TIME-
-r Durollon of florh mcolurcd bclwccn
hpor"t polnfr.
COLOR
Most electronic flash units are of about the same color charac-
teristics. Don't be confused by claims of a few hundred degrees
difference temperature. in Kelvin ratings Kelvin are approximate/^ comparisons and compared cannot be the flash accurately to ..black
body radiation". Most speedlights are of daylidrt color quality
f'\ dependingand sliehtonfilteringthe emulsion.may be required for daylieht color materials,
n RECHARGEDefined as the TtimeIMErequired to recharge the capacitors to 90%
of their peak voltage. this determines the recycling time that can
l be used with even exposures. (Fig. g).
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a, n
roo%
90 a
8O7"
TO"/" I|oTE: irost secrdUohts ffi5-efloshed whon-$t a
FI GURE 3 voltogc rs onll 60-700/o.
50o/" 1
40"/o .} 3O"/"
20"a
lO7" ^)
o
TIME......-
RECHARGE OF CONDENSER -)
t)
Most of the small units are one-light portables aimed at the
anateur. However, there are speedlights available that can prov|de
any number of lights, of almost any power, at fast rates of flash-ing, etc. Be sure to obtain the proper equipment to do the iob that ^)
you want photographicallY.
IDEPENDABILITY
Everybody claims dependabllity. Electmnie equipment can be
very dependable if properly engineered. It would be very difficult
to give any rules to guide a customer on iudging dependability. It
Iooks, therefore, like the customer must use judgement about a
Imanufacturer's reliability and integrity, plus the service and Iguarantee that backs up the unit.
A1 I sales get down to price. Itlte al 1 say that "you ean't get
something for nothing", yet we all try for a lower pri.ce and dis- Zl
count. Remember, unless the cheapest price gives the photographic -/
results that are wanted, plus dependabi.lity and proper operation,
then no matter how little is paid, it is a waste of money. n,
t:-
If we start talking about speedlight in terms of light output, with the other qualifying factors, such as the duration of the /i\c flash and the angle of coverage of the reflector, these tenns will become common and easy as we get used to them. It will help the
entire Photographic Industry if we cail "Boil the Mystery Out of .A.\\ speedlight, reduce the important factors to simple terms, so that '
speedlight or electronic flash will be considered technically no
more difficult than f/stoPs.
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S e r i e s 600 4. GENERAL DESCRIPTION
?
The Series 600 ASCORLIGHTS are high-powered, light-weight
speedlights compactly designed to combine portability with maximumn Iight intensity for location photography, as well as for studio
work. The already popular series 600 has been expanded to include
? higher-poweredto extend the rangePower ofSupplies,control newand andexposure,higher-poweredand new accessoriesLicht Uni-ts
to increase its versatility and usefulness. All components in the
series 600 are interchangeable within the limits of the power handling capability of the specific FIash Tubes. This versatility
and interchangeability is a feature that makes the Ascorlight the
choice of professionals who demand the best and who need equip-
ment capable of meeting the many varied demands of industrial
^ and commercial photography.
The ASCOR SPEEDLIGHTS are electronic devices for converting
electrical energy from a relatj.vely small power source into- high-speed, high-intensity flash of Iight. Essentially, the energya
is drawn slowly from the power line or battery, converted into
high yoltage, and stored in a capacitor (an electrical storage
tank). Then, at the moment the flash of light is desi-red, the
durnped out instantaneously of the capaci- (watt-seconds) energy is^ energy which electrical converts the tube the flash tors through
into light.n
Speedlight is eool, clean, fast, of daylight quality, efficient'
and economical.
^ IMP0RTANT FEATURES of the ASC0RLIGHT SERIES 600
t The ASCORLIGHT Series 600 includes many outstanding features
of design and engineering. A few of these are:
1. Extremely portable.
2, Dependable, trouble-free operation.
3. Modern Design - Push-button operation (some models;.
4. Adjustable power 1evel,.a 5. Light output regulation available.
6. Interchangeable Parts.
dlr Choice of Light Units fon best control and effect.r
r
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4,2 DESCRIPTION MoDEL A6 I6
The Modef A616 is the same as the Model 4614 except that a.
stand is included to provide the same type of facility as in por-
trait Studio Type of Equipment. The Model A616 includes the fol-
lowing:?
I A8614 Power Supply
I 5614 Stond
I At60l B light Unit
n
This Light Assembly is a complete operating unit with the
Power supply mounted at the base of the stand. A number of such
lights can be used together in a studio for maximum convenience,
portability, and hish tight output for types of commercial work.
Although the 10n Reflector Lieht is shown with this Assembly, itr is obvious that assemblies using the various types of Light Units
and Accessories can give complete flexibility to a Studio installa-
e tion. Fbur Lights courd be operated from this one power suppry.
4
f
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A6204.3 Description Model The Ascorlight Model A620 is a studio Light Assembly capable f assembled withof supplying 24oo watt-sec. to one light. It is
a stand as a Studio lYpe of Light and includes:
I A8620 Power Supply
I 5620 Stond
I A1630 Lisht Unit
The 8620 Power SuPPlY is a
portable 2,4tJO watt- sec. Power
Supply that makes possible higher
light output in Portable equip-
ment than was PreviouslY avail-
able. The Power SuPPlY has one
1,600 watt-sec. channel and one
each 800 watt-sec. channel that can operatie one or two liehts
and make use of the lower priced 1,600 watt-sec. Flash Tubes and
Light Units. When desired, however, all the power can be put
into one tube by using the L630 Light Unit with the F630 Flash
Tube, which connects to a special connector on the Power Supply'
Power: I 15 volt 50/60 cYcle AC
Fuse MDX 7 omP. Slo-Blo
Speed of Flqsh; full power on one Light | /150 ,*
71/a x 13 . weight: 40 lbs. Rechorge Time: 30 sec. size: 18 x
Light Output: 50,000 BCPS*/55o
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,TI
A620 5.2.1 Special Instructions Model
The Model A620 has a total of 2400 watt-sec. enerry storage.
When all of the power is to be used from one Light,Source, the
L630 Light Unit is used and a special connector is provided to attach to the large connector. This precaution helps to prevent
Tube the photographer from putting too much power thru a Flash
of tesser power handling capability.
The four eight pin connectors are for use when used with Light
The Units having Flash Tubes of less power handling capability. and are con- two outlets to the left (#1 and y21 are in parallel
connectors nected to 1600 watt-sec. One Light in either of these
connec- will get 1600 watt-sec. If a Light is attached to both tors, the enerry will divide, making 800 watt-sec. to each light.
and are conneeted to 800 Outlets #3 and #+ are in parallel 800 watt-sec. One Light in either of these connectors will get watt-sec. If a Light is attached to both of these connectors, the enerry will divide, making 400 watt-sec. to each light.
Mode I A630 5.2 .2 Spec ia | | nst ruct ions
The four eight pin connectors on this Power Supply are isolated
into 2/L6OO W--S Banks with two connectors on each Bank. This pre- vents overloading the flash tubes when one 1600 W-S Flashtube is
be used alone, otherwise a minimum of 2/BO0 W-S Ftash Tubes must
used off a single Bank. At such time that all of the power is
F630 to be put into one light source, the L630 Lieht Unit with a
Flash Tube must be used. This Light Unit has the proper type
connector to attach to the Iarge connector which automatically one light. connects all of the 3200 watt-sec. together for use in
20 (a). Caution - Do not turn the unit back on until after 15 or seconds so that the unit has time to discharge. This is to
avoid drawing an arc with the relay and causing trouble.
(b). Do not flash before the unit is fully charged.
See the diagrams on the following page for location of the
various connectors and also for information as to the various
light outputs that are available.
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I ON 5.3 LECTRO-SYNC OPERAT
NQTE: The Lectro-sync Remote control system ean be used only with remote power supplies-ASCOR equipped with proper circuitry for control. 8614, 8620 and 8630 Power Supplies are wired
for this circuitry.
I. GB{ER"AL
ili"t"o:Sync Remote Control System has been designed without the use of connectinge Eering electronic flash units for trlg- M548 Lectro- Jync cords or phototubes. fite, system consists of CW signal over the power lines' Sync Transmitter which sends a to the and Lectro-Sync Control Receivers which are connected
triggering circuit of the individual power supplies. A sync cord connects Lectro-sync control Transmitter with the carnera and each time shutter is operated, the transmitted signal is
interrupted, causing the Lectro-Sync Remote Control Receiver many to generate a pulse which triggers the flash unit' As receivers as desired can be operated with one transmitter'
f"D
II. INSTALLATION camera' Mount Lectro-Syne Transnitter on calnera stand or near Connect sync cord to the camera; sync cord should be 6 ft'{n max. Iength or shorter. Plug Transmitter into power Iine
and turn the power on by depressing power-on push button
switch. Powe, iONn light should glow. Allow about 15 seconds
for warrn-up before operating transmitter'
Next plug in Lectro-Sync Receivers into the phototube sockets the on the power iuppliei, making sure the power is gff in on, power supplies. N.u." plug in Receivers while the power is power otn.rwise the Receiver might be damaged. Turn on all supplies and after 30 seconds the system is ready to operate' Before making exposure turn the Transmitter off; the lights should fIash, indicating that the system is working'
1/100 To ensure your exposure in full Sync, shutter speed of
or slower is recommended.
III.OPERATING--- NOTES (a) If you nave difficulty, check first to see if the power be supplies and lights themselves are operating. this can
donebyusingaregularSynccordconnectedtothecarnera
shuttei from each power supply or by using a push-button sync cord. A service man can do this by shorting pins
No. 6 and NO. 4 On the Sync socket on the power supply.
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(b) rf you can flash the units bv switching the Transmitter on and off or by shorting the sync outlet but the carnera will not operate units, check your sync cord anO your o camera shutter.
(c) rn case you can frash certain lights when they are plugged p into certain power out'lets but you cannot flash them in the other power outlets, you have the power suppfies or the transmitter on the opposite sides of tne e.C. Iine. This difficulty can be easily corrected by instarring a C
coupling condenser .2b mfd. 600 volt directly across the
220 v. service in the main fuse box, lsee diagram for connection). you can have an electrician rirake this instat_ Iation, the .2b mfd. 600 volt capacitor can be obtained o in any local radio store.
IV. OPERATING FREQUENCY e
Leetro-Sync Remote Control System operates at 19b KC. In case two Transmitters on the same frequency are u"Lo on the same line, it will be impossible to flash speedlignts. the fn case o this happens, it is suggested systems that the be tuned to different frequencies. This can easily be done by a competent
radi.o repair man, as the frequency can be varied in a range of about 40 KC on both sides of the 19b KC to which it is o originally tuned.
V. RANGE OF OPERATION o, The actual range of operation depends on many factors, such
as the number of fluorescent Iights, appliances or machines
operating on the line, type of load (capacitive load tends to shorten distance of operation), and whether the power r.ines t are overhead or underground. Even under unfavorable condi- tions, the effective range of operation is 100 ft. Operation .-^ in the range of several hundred feet can be expected with lines that are less attenuated or where the conditions are
, favorable.
VI. RF INTERFERENCE -It The system of using a continuous carrier current with the
synchronization caused by the interruption of this carrier current provides protection built-in for interference to the o operation of the Lectro-sync system from devices operating in the vicinity.
The Lectro-sync Transmitter does not cause interference by s aerial radiation. some radio receivers that do not have an input transformer can pick up interference because of the second and third harmonics on the power line transmission. o This type of interference is easily tuned out by changing
the setting on the tuning dia1. T
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a
SYSTEM OF LECTRO-SYNC VII.-- ruNING System to a different frequency, the Lectro-Sync fil To tune first use a frequency meter or a frequency B oscillator theo and adjust the capacitor C1 (Schematic 58354) to
the receiver in Rl across resistor meter a volta (2) correctAttach frequency. T1 transformer of the slug and adjust sE365A) (schematic
for minimum voltage reading.o
DATA 6. PHOTOGRAPHIC AND TECHNICAL
Most of the pertinent technical data is given in the Descriptiono be of the model in Sec. 4. Additional details and discussion wiII
given in the following sub-sections.o 6.1 Technical Data
Fbr Model A614 see Sec. 4,L
see Sec. 4.2o Model A616 frlodel A620 see Sec. 4.3
Model A630 see sec. 4.46 6.2 SYNCHRON I ZAT ION
AIl ASCORLIGHT units use an electronic tube in the triggeringo circuit or sync circuit which directs the current through the
FEATURE toe flashNOTE:tube--notHere thewe haveshutterincorporatedcontacts. ANoTHER SAFETY prevent electrical damage to the shutter contacts and
to personnel. rlGE.J
G3 l Et
3tlE' The unit flashes when the two sync leads are "shorted" to-
gether. The flash occurs only a few microseconds (millionths; s;!v after this short (contact) is made. since the time lag is negli-
gible, this type of triggering is known as zero delay.
new type shutters are equipped with internal con- fr Most of the tacts for zero delay synchronization. For other type shutters synchronization may be accomplished by the simplest type of con-
tact arrangement. Since the time lag between the closing of the@ circuit and the resuLting flash is insignificant, accurate synch-
ronization is obtained by adiusting the contacts so that the
How- circuit is closed at the instant the shutter is fully open.
body are superior the shutter within installed contacts ever,o make serviceman camera a qualified that and is recommended it
the installation.o
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www.butkus.us c In the case of a Packard shutter, a microswitch or other type
of contacts can be arranged so that the plunger actuates the
contacts. For Compur, Supermatic, or similar shutters, the cock-ing lever can be used to actuate the spring contacts at the pro- o
per instant. In case the cocking lever itself is used as one
contact, the ground lead in the SyNC cable should be connectedto it. If a metal lens board is used, the spring contacts must o
be insulated from it.
Synchronization may be easily checked by aiming both the cam-era and the light at a lieht surface. Then, with the camera back o
open and the ground glass removed, look through the lens and
trip the camera shutter and synchronizer. the high speed of thetight makes it possible to observe the exact position of the G
shutter leaves at the instant of the f1ash. Adjustment should be
made so that the shutter is completely open at the time of the
Flash. You should see a perfect circle if your shutter is in sync.this check should be made with your fastest shutter speed. o
6.3. Lisht Data C
As previously mentioned the light output of ASCORLIGHT equj.p-
ment is of daylieht quality. This means that when referring to C} ASA ratings and exposure indexes of films the daylight ratings
are used. Most film manufacturers specify the proper filters for
color correction for their color films. Use filters as recommended for speedLieht equipment. For a measure of the quantity of light C
we have found that the Bearn candle power seconds (BCPS) is the
most accurate measure of the amount of available lieht. This com-
bined with reflector coverage is a much more realistic figure than o watt-second rating which takes into account only the power supply.
the g.C.P.S. values for combination of light unit and power sup-
ply is given. Sec. 4. ^6.4 Exposure and Gu i de Numbers
Guide numbers have long been used by photographers as an aid
in estimatine the proper f stop for flash bulbs. It is the prod-
uct of the lieht-to-subject distance times the f stop. By divid-
ing the distanceofthe light-to-subject into the gui,de number, the f stop i.s obtained. Fbr example, with a guide number of 110 and a o tieht-to-subject distance of 10 feet, the f stop uould be f/LL,
Due to tolerance in films and variations in technique, guidenumbers can at best oniy oe what the name suggests, a guide or o
starting point. Should more critical data be required, experiment-
al tests by the photographer himself should be made. e
o
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6.6 DEVELOPMENT www.butkus.us o
speedlieht is just light. Ar1 the taws that eppry to right, still apply to speedllght or electronic fIash. o As in photography with incandescent lightlng, the flnal imageon the fllm is affected not only by the anount of light on the
subject, but also by many other variables such as aperture, ftlm speed, development techniques, etc. With speedtight shutter speed o
is not a factor since the flash is so fast tirat trrE@ all of the flash even at the fastest shutter speeds. It is possible to use special development techniques and de- s
veloper and get an extremely high effective guide number. For
many types of photography, this technique is quite satisfactory.To acheive optimum results for news photography, the Associated oPress recommends with speedlights, about one-third Ionger than
normal development time used with flash bulb exposures. When the photographer desires to use a higher effective guide o
number (i. e. less exposure), normal contrast can be obtalned by
over-development. Thls is belng commonly recommended for speed-light negatives. However, NoRITIAL NEGATTvES can be obtained with C
NORMAL DEVELoPMENT provided the nesative is given ADEqIATE EX-
POSURE. ASCOR gUiCC NUMbETS ArE fOr NORMAL E)troSl'RE AND NORilAL
DEVE,OPMM{T. a 7 . CARE AND MA I NTENANCE
Although the ASCORLIGHT 600 Series Speedlights are ruggedly obuilt pieces of electronic equipment, they should be handled with
the same care given to any piece of quality equipment. To be as-
sured of maximum dependable service, the photographer should ob- serve the following precautions: f
1. Avoid bending the cable sharpLy. lbo sharp of a bend can I break the wire in the cab1e. ^
2, If cable becomes frayed or connectors damaged, have them re-
, paired i.mmediately.
3. Keep all connectors free of dust, moisture and cormsion. t 4. Do not connect or disconnect light units when capacitors are
charged. (Turn control switch to "off" position and- flash
unit before di.sconnecting). o 5. Avoid quick repeated flashing. Damage may result. Ttre full
charging time should be allowed between flashes. '3
6. Don't - Insert or remove a flash tube unless thepowersupply
unit is fully discharged.
7. Don' t - Insert a screwdriver or other metal obj ect into the flash tube socket or any eLectric outlet, socket or recep- o
tac1e. Contact with high vol,tage may result.
3
Page 20
oView original page 24Page 25 · Read text
G
g. Ilrn,t-Place a hand or objects near any part inside the unit
until you are certain that the capacitor bank is ful1y dis-
charged.@ 9. Don't - Attempt to make repairs to ASCORLIGHT units if you are not famitiar with electronic equipment. Your dealer
should be consulted regarding our Authorized Service Station
your area. ina a hieher rated fuse flran is recommended' use Never 10.
SAI"E 11. Remember all ASC0R equipment is caretu1ly desigred to be
when used in accorda"nce with the instructions'o 12. IYhen not actually using your ASCORLIGHT unit, it is advis-
able to tum the unit "off".
G
8. Se rv i ce
NOT OPERATE ON ACc IF UNIT DOESCh eck i n g P rocedu res
check to see that the power is properly connected and that the
switch i.s in the Proper Position.o
Check fuse; replace if necessary. See TECHNICAL DATA' Page 8'
power unit is@ Observe whether or not the indicator lamp on the
AC glowing. If it is not glowing when the unit is turned on to
position, no power is reaching the unit.o If the indicator larnp shows that power is reaching but the unit does not flash, observe whether or not the ready-Iight indicator
on the light unit is blinking. If the ready-light indicator is trnuble is i.n the trig-o blinking ana tne unit does not flash, the
gering circui t.
6"1 such as a paper c1ip, and in- - By taking a bent piece of wire, l:5 serting it into the sync connector on the light head, one can
flash the unit. If the unit flashes in this manner, but does not t,.[ flash with the camera, the sync cord or the contacts in the shutter
v are defective.
sometimes a camera is so constructed that one of the contacts
is electrically connected to the frame of the camera. Qne side ofo the sync connector is grounded and the other side is "hot". If the sync connector is so inserted that ttre hot lead is connected to the grrrunded contact in the canera, the sync voltage is shorted correct@ out and the unit will not flash. AlI that is necessary to
a of trouble, the cause reveal do not the above checks Ifa this is b reverse the pluc 180 degrees. shouLd serviceman Authorized our serviceman or preferably radio
be requested to check to see whether or not the capaci.tors are
@ shorted.
Page 21aView original page 25From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
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