Light meters
Gossen Luna-Pro Digital User manual
User manual for Gossen Luna-Pro Digital. 24 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Gossen
- Model / document
- Gossen Luna-Pro Digital
- Document type
- User manual
- Language
- English
- Pages
- 24
- File size
- 0.9 MB
- Category
- Light meters
- Document date
- Not specified in catalog
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Page 3 · Read text
Diffusersetting for incident light measurement
Dffuser setting for reflected light measurement
Battery compartmentcover
Serialnumber
Battery
compartment
Eyefettor carryingstrapView original page 3Page 5 · Read text
tYour GOSSEN LUNA-PRO digital is an ex- Featuresthat characterisethe
posure meter with digital display. lt is intended LUNA-PRO digital:
for all continuous light measurements, and
covers a wide measuring range with great Two measuringmethods:
accuracy. Incident and reflected light
Microprocessorcontrolled
Digital LCD display in tenths stops
Analog contrast display
A wealth of knowledge in the area of light mete- Storage of settings and readings
ring, based on many decades of experience in Programmableexposurecorrection
the manufacture of exposure meters, is now Recall of all possible paired settings of a
being made availableto the user, in the simp- givenreading
lest manner possible, through microprocessor Aperture or shutter priority preselection
technology, Covers the entire cine scale (frames per
As a resultof its very elaborateand precise cali- second), including the W standard 25 and
bration, the LUNA-PRO digital rneasureswith 3O f.p.s.
the greatest accuracy, and operation is except- Warning when range is exceeded
ionallysimple and convenient. Automatic battery check
Auto offView original page 5Page 6 · Read text
1 Display
1.1 Thedisplayanditselements
1 Functions
|-]_| Shutterpriority
lI Aperturepriority
Exposurevaluedisplay("EV") lEUl =ulf,alil@ IttH#l Enterirrgthecorrectionvalue 1 1.4 2 2.8 4 5.6lB; tt t6 22132 45 64 90 trl
Settingthefilmspeed I r I r l r l . I ' i l t i l n I r l r l [ l r I r I r I lr*l
z Digitaldisplayof film speedASA (lSO) 5 6 7 8 9 1 0 1112
aU Displayidentification"f" for aperture B Warningsign "BAT" for batterycheck rt
4 Display identification EVrr for exposure 9 Displayidentification" /" tor fractionsof a
value second
5 Analogaperturescale 10 Right-handdigitaldisplay
6 Left-handdigitaldisplay Exposuretime t lshutterspeed)
Aperturef Exposureextensionfactor
FxposurevalueEV CINE(framesper second);
Correctionvaluestops syrnbol: t
Filmspeedin DIN Filmspeed in ASA
Displayidentification"t" for exposuretime 1 1 Unitsymbol"m"for minutes
'S' 12 Unitsymbol for secondsView original page 6Page 7 · Read text
1.2 Displayduration 2 Howthe LUNA-PROdigital
The displayis automaticallyshut off, i.e. there functions
are no readings, if any control bt_rttonof the 2.1 Preparations
LUNA-PRO digital has not been used for 2
Batteryminutes.
The LUNA-PRO drglital operateswith a 1,5 V fhe stored valuesare calfedby depressing
M-type battery (alkaline-rnanganesebattery). the functionor valuebuttons.
Since the meter's power consurnptiorris rnini- Renewedmeasurementis instantlypossi-
rnal, the batterywill last for a long time. When ble when the meteringbuttonis depressed.
the battery'ricapacitybecomesexhausted,theThe valuesof the last meter readingare stored UBAT" syrnbol appears on the cJisplayas auntila new meterreadingis taken.
warning;that the kratteryhas to be replacedart
tlie earliestpossibleo6r;tortunity.
Measurernentscease to be possibleif the dis-
play only irrcJicates"BAT". The Ltartteryrnust
be immediately replaced.
To change the battery open the battery com-
partnrent crf the LUNA-PRO digital. Renrove
the exhaustedbatteryand inserttlre new one.
Ensure correct polarity 'r+r' and rr-"f Push
back the batterycorllpartnrentcover.
Batterychangingerasesall stored values!View original page 7Page 8 · Read text
Self-CheckingRoutine
The microconrputerperforms a self-checking
routineas soon as the batteryhas been insert- ed. Everypossibledisplaysegmentappearson trtlbdE trEfiilfi
the displayduringthis routine.
The duration of the self-checkingroutine is
approximately10 seconds,but it can be inter- ,lnilndnEtil;1.4 2 2.8 4 5.6 I 11 16 22 32 45 e4 90 ruptedby depressingany button. |
The factory-programmedbasic settings are ' autonraticallyadjusted as soon as the self-
{. checkingroutinehas been cornpleted,
i''
Basicvalues
tso 1aa/ 21 "
c o R o / 1 0
f 5.6
t 1/125
EV 12View original page 8Page 9 · Read text
2.2 fncidentandreflectedlightmeasurement Measurementby the incident method is far with regard to its measuringpossibilitiesand more accurateand reliableto establishthe cor_ operation,the LUNA-PROdigifal was design_ rect exposuresettingthan the calculatingof a ed for professionaluse. Due to its adjustable mean value obtained with the reflected light diffuserdome, the meter is easilyadaptedto all measurementin your camera.In the lattercase, measuringmethodsused in practice. the readingdepends upon the range of con_ Incident fight measurement leads to particu- trasts of tlre subject. However, there rs not larlypreciseexposures.with incidentlightmea- alwaysa uniformdistributionof brightand dark surefirentthe LUNA-PRO digital, when used areasof equalimportancewithirrthe subject. with the adjusted diffuserdome, points from the subjecttowardsthe camerato measurethe Incidentlight measurer-nentis also imperative incident light. This guaranteesa precise ex- with inaccessiblesubjects.For this purposeit is posure in conformity with the correct tonal necessaryto select a point that has the sarne values of the subject. This is particularly lightinglevel as the subject. And then a meter importantwith inherenilybright or dark sub- reading is taken that lies parallelwith the pro- jects. Even in difficultexposuresituations.for jected connectingline betweenthe actualsub- instancewith contrastysubjects,incidentlight ject and the camera. This very convenient measurementwith the diffuser results in far method of light meteringat a point with the more accurateexposuresto satisfythe rnost same lightinglevelis highlyrecommendablefor discerningprofessionalrequirements. outdoorshots.View original page 9
Page 10 · Read text
The measurementis performed with a com- lf readingsare to be taken exclusivelyby the
plete "180" turn" in front of the cameraso that reflected light measuring method, then it is
the reading is taken with the meter pointing advantageousfor the professionalto use a grey
towards the camera, i.e. opposite the actual card (19o/oreflection)in this mode.
pictureshootingdirection.
Incidentlight measurement,i.e. with diffuser, The reflectedlight method is used to measure
also gives a precise reading of the brightness the subject contrast which is displayedby the
rangeof the lighting. LUNA-PRO digital on its analog scale (see
Section3.2.2 Contrastmeasurementon page
Parallelto this, the LUNA-PRO digital also 13).
offers the reflected light measuring method.
In this mode the diffuserdome is pushedaside
to the left or right, and the meter is pointed
from the camera towards the subject. The
meter now only measuresthe llght reflectedby
the subject.Consequently,the readingalways
depends upon the inherentbrightnessof the
subject! This means that inherentlybrighter
subjectsare not preciselymeasuredand there-
fore rendereddarker.
1 0View original page 10Page 11 · Read text
3 Theindividualfunctions
3.1 Settingthefilm speed
l-l
Select with the frrnctionbuttons. l,Sol
Adjustthe requirecJISOvaluewith the value t t Ev con lgl
buttons.(Display:left DIN value;right ASA
value) LiOnce the film speedhas been set, it is transfer- I-l ilil
red to the memory of the LUNA-PRO digital
when the meter is adjusted to any operating
function,and remainsvisibleon the top right-
hand sir1eof the digitaldisplay.
Any changeof the film speeddirecilyinfluences
the storedpairedapertureand shuttervalues.
The selected film speed is retained in the
memory until it is changed in the describrecJ
manner,View original page 11Page 12 · Read text
3.2 Themeasuringfunctions 3.2.1 Shutter priority mode
Shutter priority in functio" I t l, Select fI with the functionbr-rttons(the
a readingis taken for the corresp.rorrding last storedvalueappearson the display).
aperture.(seeSection{3,2.1,page 12). Adjust ttre desireclshuttterspeed with tl-rc
valuebuttons,
Contrast measurementin functioniI, Measureby pressingthe measuringbuttort
(see Section 3.2.2, pagle 13). M
Aperturepriorityirrfurrctio"l7l, The measured ape;rtt-trestop appears on ar reading is tnken for the cclrresponditrg the left-hancidigital display (accuracy:1/
shutter speed (see Section 3.2.3, page 1Othstops),also as a rounded-offmark in
1 4 ) . the analogaperturescale.
Select alternativeaperture/shutterspeed-
Exposurevaluemeasurementin functio"lEUl, combinationswittr the valuebuttons,
the shutter speed is preselectable, and
is given as aperture the
t Ev con rso page 15). (see Section 3.2.4, trlt-ltuu an analog value II
CINE speed (franresper seconcl)in function I s (seeSection3.2..5,page 15). I 'I,il[ t'!ilil
Setect the requireclfunction witl-t the corre- 1 1.4 2 2.8 4 5.6 I 11 16 22 32 45 64 90 I
spondingfunctionbuttons:
1 2View original page 12Page 13 · Read text
3.2.2 Contrast measurement
Select |-!-l with the frrrtctiortbuttorrs.
truttorr .r.rl Keep M depressed the measuring t €v coR rso I ) J H while at various areas of II| aimirrg the meter
the sr rtrject, The arralog apefture scale displatys the f- '1|,ililt'!ilil s
stop series between two extrenre valttes,
ancl with the actual rneasLtreclvalue flash- | 1.4 2 28 3,5.6 B 11 t6 22 32 45 64 g0
ing. The first rneasured f-stop is clisplayecl l . r f i . l . l
on the left-hand side of the ciisplay. (lt
rernains clisplayed as a reference value
(e.g of a grey carcJ)throughotlt the etrtire
rr reasrrrirrg pr.ocedrrre.
After the measuring button is relearserJ,the
entire measured contrast range is cJis
playeci on the analog aperture scale, ancJ
the last measLrredvalue will cease to flash.
Contrast range of the subject:
without diffuser.
Contrast of illuniination:
wrth diffuser ort.View original page 13Page 14 · Read text
3.2.3 Aperture priority mode
Select with ttrefunctionbuttons. I=i-|
Set the desired aperture with the value but- EV COR ,so ![l] tons. nNote: ';In t'l nsThe intermediate 1/l Oth stop values stored U
fronr the last measurernent appear when the 1 1 . 4 2 2 , 8 4 5 . 6 8 1 1 16 22 32 45 64 90
Iaperture is preset. These are invalid because
the valid 1/1 Oth stops will only appear after the
next meter reading is taken.
Measure by pressing the measuring button
M
The measuredshutterspeedappearson
the right-handdigital display - Automatic
adaptationof the aperturein 1/101hstops
to the measuredshutterspeed.
Selectother pairedaperture/shuttervalues
with the valuebuttons.View original page 14Page 15 · Read text
3.2.4 Exposure value "EV"
SelectlEyl with the functionbuttons.
Measure by pressingthe measuringbutton ,soLi t f lFl ilil "o* M
The measuredexposurevalue appears on s the left-handdigital display (accuracy:1/ *'[il
10th stops),and the apertureas a round- Evllr
ed-offmark in the analogaperturescale. 1 1.4 2 2.8 4 5.6 I 11 16 22 32 45 64 90
Select with the value buttons other paired I
aperture/shutterspeed valuescorrespond-
ing with this exposurevalue.
3.2.5 CINE scale (frames per second)
Select with the function buttons. fI
(f.p.s.) Select with the trf f Ev coR rso trtrrf ulJ the desired speed
value buttons.For this purposeexceecl1/ B000ths. After approx.1 secondthe meter I
switchesover to CINEspeeds.The symbol l['r Ill I appears on the display. The cine 1 1 . 4 2 2 , 8 4 5 . 6 8 11 16 22 32 45 64 90
speeds can be preset between B and 64
frames/second.
1 5View original page 15Page 16 · Read text
Measureby pressingthe measuringbutton
M .
The measured aperlure appears on the
left-handdigitaldispiay(accuracy:1/1Ottr
stop), and additionallyas a rounded-off
mark in the analogaperlurescale.
The displayedapertureappliesto a 180 degree
shutterblade.
Enter a COR value in the function for trl
other shutterbladesas an extensionfactor
V = 180":open apertureangle
3.3 Measurementsoutsidethe measuring
range
EV COR ,so lil[ The LUNA-PRO digital will not produce II
any useful readingsoutside its measuring
range.
.'E,' lf it is too dark or too bright, an (- error)appearson the left-handdigitaldis- Irr
play,and alongsideit " l-| " for too dark,or ' n " for too bright.
1 6View original page 16Page 18 · Read text
3.4 Settingandmeasuringcorrectionvalues
(SeeSection3.4.4 lmportantremarksconcern-
ing correctionvalues)
3.4.1 Seilingcorrectionvalues
t-l
Select f"*l with the function buttons. t f Evlgf ,so fl-he last valid correction value appears on 1ilil
the display)
Enter or change the correction value with Dl
the value buttons. i The extension factor is shown in the right- t,[
hand digital display, and the correction
value in stops in the left-hancJsection.
Enter in 1/10th stops (small figure) within a
range of + 7.9 exposure value stops.
A figure preceded by "-" indicates an expo- t t €vlgl ,so |ilil SUreextendlrlg Correction.
Example:
- 3,1 stops equal factor E.6ln the event of an exposure shortening cor- lr
recrion, clnly the left-harrcidisplay appears as
an exposure value difference in stops.
1 BView original page 18Page 19 · Read text
3,4.2 Measuringcorrectionvalues
Correctionvaluescan also be directlymeasur-
ed. However,measurementdoes requirecon-
stant light. t t 'u lgll ,so lllil
Depressionof the measuringbutton initia-
tes a referencemeasurementthat is identi- fiedon the digitaldisplayby "rF --" r-F
lnsertthe light-reclucingfiiter (e.g. neutrai
densityfilter)in the opticalpath, and press tf Evl:gf ,so1ilil the measuringbutton.
The light reducingfactor in stops, and tlre extensionfactor, automaticallyappear on Dlr
the display. I.il
1 9View original page 19Page 20 · Read text
Pressingthe functionbuttonstransfersthe
correction values to the memory of the
LUNA-PROdigital. tnEv ,so r-l 1ilil
The box arounOHl stillappearswhen a cor-rectionvaluewas entered. 'L|,ililEIt'5nns IJIJ
The COR value is now automaticallyconsider- 1 1 . 4 2 2 . 8 4 5 6 8 1 1 16 22 32 45 64 90
ed in all subsequentn'leasuringfunctions. t
3.4.3 Cancellingcorrectionvalues
l-l
Select fr,rnctionbuttorrs, l"*l with the
Press rneasurin-c; button t f EVlgl ,so |ilil
(disPlaY= "rF --").
Select anv other function lvith a function
button. Correction value is cancelled, and the box r-F
around con disappears.View original page 20Page 21 · Read text
3.4.4 lmportantremarksconcerningcorrection However, you can calibrateyour LUNA-PRO
values digital to the characteristicsof your camera,
your brand of filnr, your processingrnethods,
The LUNA-PRO digital is a precision meter and to your projector.
calibratedwith great accuracyto provideexact
exposuredata. Shouldyou stillnot be satisfied We recommendthe followingprocedure:
with the resuits, then yoLl should remember Take the readingsof a few normalsubjectswith
that there are inrlependentvariablesthat can the utmost care by the reflectedattd incident
infltrcncethe successof your exposures: light measuringmethorJs,and take five shots of
each subject on cololtr reversalfilm, Tlre first
picture should be exposecJwith the exposureF:orinstance
The "true" speed of your film can deviate settirrgssupplied try the LUNA-PRO digital,
from that on the pack. The exposure sottingsfor the rernainingshots
Tlre "true" shutter speeds and f-stops on are therr increasedancJdecreased,respectiv-
your camera can differ slightly from the ely, by half an f-stop and then a full f-stop.
ratedvalues. Make a note of the sfrootingconditions.
Deviationscafr arise when the film is pro- Thesemust not changewhilethe five shots are
cessed. treing taken. |\Jow select frotl the processed
pictures the one you consider to be optirnal
To the above must be added purely subjective and compare its settingswittr ltre meter read-
factors and matters of porsonal preferencein ings.
the assessmentof the finishedphotos.
21View original page 21Page 22 · Read text
lf you find that you prefer exposurestaken iryith 4 SefViCefemafl$
settings that differ from those supplied by the
ineter, then these settingscan be progra.irmecl In the event that yoLlrLUNA-PR0 digrta, is notinto your LUNA-PRO d'$tal working to your corrplete satisfaction,please
send it to:
wih your correction,the LUNA-PRO digitat will
give precise readingsto produce optimal expo'
sttreresurts
boggtthotocor'
p.d.soxsoo
565 East CrescentAve.
Ranrsev.N..1.07446 0506View original page 22Page 23 · Read text
5 TechnicalData
.1Measuringmethods Incidentlight Battery x 1.5 V M-type;
Reflectedlight battery condition indi-
Sensor Siliconbluecell photo- catlon
diode Accessories Case, neck strap, bat_
Measuringrange tery' and Operating
(at ISO 100/21") EV - 2.5 to + 18 Instructions
Repeatableaccuracy t 0.1 EV Dimensions approx.
2-1/2" x 4-1/2" x 3/4"Exposuretimes 1/8000 sec. io 60
Weight(withoutbattery)approx.3.3Soz. minutes
Aperturestops f/1 Iot/9O9/tO
Cine speeds B to 64 f.p.s.,
inct. 25 and 30 [tV)
Adjustableand measur-
able correctionvalues - 7 .9 to + 7.9
and
Extensionfactors 1.Oto 24O
Filmspeeds ISO3 to 8000
Acceptanceanglefor
reflectedlight 25"
23View original page 23From the M. Butkus archive. Original publisher and archive notices are retained.
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PDF verified 2026-10-10.