Gossen MASTERSIX ATTACHMENTS User manual

The attachments for the MASTERSIXwww.orphancameras.com
form part of a light-measuringsystem and
are made to fit other hand-heldexposure
meters producedby GOSSEN. Operating
instructionsconsequentlyalready exist for
the attachments,in which their use in con-
junction with other exposure meters is
described.
The present manual explains how to
handlethe attachmentsin conjunctionwith
the MASTERSIX.General inforrnationin
the two sets of  instructions will apply
accordinglyto other exposure meters in
the GOSSEN range.
All attachments for GOSSEN exposure
meters, including the MESS-SONDE
(measuringprobe)and MICRO, which are
not electricallyconnected, can be used
with the MASTERSIX.The MICRO attach-
ment is handled in the same way as
the  PROFI-micro; the MESS-SONDE
(MEASURING PROBE) is used like the
PROFI-flex.They need a correctionfactor
of +3  to be entered, however, in the
CORR mode.




50   Attachments

Contents                    www.orphancameras.com
Part 2,,Attachments"
TELE      reducesthe measuring         Page 54
           angleto15" or7.5".
PROFI-spot for selective measurements,     Page 58
            spot metering,at 10o,5oor 1".
PROFI-colorfor measuringcolour           Page 62
           temperatureand indicationof
             correctionfilters.
REPRO    providesexposureinformation   Page74
              for copying.
PROFI-flex particularlysuitablefor         Page77
           macrophotography,for g round
            glass measurementsof cameras
           and inaccessibleareas.
PROFI-lux  facilitatesprofessional        Page 82
             incidentlight readings.
PROFI-      for measuringat the film        Page 86
select TTL   plane of large-formatview
           cameras.
PROFI-microassuresconvenientand precise  Page 94
          measurementin micrography.
LAB       determinesexposure data for     Page 98
           darkroomprintingand enlarging.





                                                                                Attachments  51

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Electrically connected attachments
After  the  protective cover  has  been
removed   f rom  the  sockets  of  the                    www.orphancameras.com
MASTERSIX, the attachment and meter
can be pluggedtogether.The dtffuserhas
to be slid to tfre right, or to the middle in
the case of the PROFI-color.
With  the  PROFI-sPot, PROFI-color,
PROFI-flex,PROFI-lux,PROFI-selectTTL
and PROFI-microattachments,which are
electricallyconnected to the basic meter,
the internalcircuit of the MASTERSIX is
automatically programmed  with  the
requisitecorrectionfactors.





 52   Attachments

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TELE
Using the TELE attachment,the measur-
ing angle of your MASTERSIX can be
reduced to 15" or 7 .5".
Attaching the TELE is quite easy. You
remove the protective cover, simply slide
the diffuserto the right and locate the lug
on the TELE in the recess provided on the
MASTERSIX. Then, with the knob pres-
sed, join the two together; when the knob
is released, the MASTERSIX and TELE
are rigidly connected.





                                                                           www.orphancameras.com





54   Attachments

www.orphancameras.comBefore taking a reading
The measuring angle is adjusted with a
switch,which slidesfullyto one side or the
other. if " Q 15o"appedrsat the end of the
slide, ds shown  in the diagram, the
measuringangle is set at 15".




lf the slide is moved all the way in the
opposite   direction,  the    inscription
" Q 7.5o" appears at the end of the slide,
indicatingthat the measuringangle is set
at 7.5'.
To avoid measuringerrors,always ensure
that the slide reaches a stop which you
can actuallyfeel and engages.





                                                                   rELE  55

Taking a reading            www.orphancameras.com
Measurementsare made as described inthese operating instructions. Exposure     lrGD
corrections have to be made before the
measurements.The following correction
factors have to be fed in (see page 13):
with a 15"         + 1 for ambientand
measuringangle.   flash readings
with a7.5"        +3 for ambient
measuringangle:   readings
                +2 for flash readings
The followingmethod is also suitablefor
rapid settin"g of correction factors  for
ambient light readings:with the meter in
the CORR mode and with the TELE
attachment in place, aim at a uniformly
illuminatedsurface, e.g., a house wall,
and press M. Then removethe attachment
qnd mesure at the same place by pressing
M. This will programthe individualcorrec-
tion  factor  of  your TELE  into  the
MASTERSIX. This, of course, assumes
constantillumination.




56  rE LE

To take a reading, aim at yourwww.orphancameras.comsubject
throughthe attachment'sreflexviewfinder.
The distancefrom your eye to the viewfin-
der should be about 25 cm. What you can
see inside the (larger) red circle wlll be
measuredat a settingof 15o;the (smaller)
green circlebelongsto the 7.5" measuring
angle.





The illustrationshows the three measuring
fields (30", 15",7.5")ofthe combinationof
MASTERSIX and TELE attachmentfor a
constant distance from the subject being
photographed.




                                                                   rELE  57

PROFI-spot                www.orphancameras.com

The PROFI-spot attachment converts the
MASTERSIX into an exposure meter with
a choiceof small anglesof 1", 5" and 10o.
The  PROFI-spot  is  attached  to  the
MASTERSIX after removingthe protective
cover. To do so, the diffuser has to be slid
to the right.
The neck strap provided is attached to an
eyelet on the PROFI-spot.The snap hook
at the other end of the strap clips on the
carrying strap of the MASTERSIX. This
providesadditionalsecurityfor the PROFI-
spot.
The small measuringangles permit accu-
rate aiming at even the smallest parts of a
subject.
The high sensitivityof the MASTERSIX
produces perfect readings in most practi-
cal cases,even in poor lightingconditions.
Parallax-freemeasurement is ensured by
the  fact that the  light beam entering
through the objective is split up in the
PROFI-spotinto a measuringand a view-
findingbeam.

58  PRoFt-spot

Taking a reading            www.orphancameras.com
The subject being photographedis aimed
at through the viewfinder. Three circles
are visiblein the viewfinder:for 1o,5o and
10". The desired image angle is selected
by a switch on the PROFI-spotand is indi-
cated by a red light-emittingdiode at the
top edge of the viewfinder.
Now aim at the subjectbeingmeasuredand
press rocker switch M. The reading from
the part of the subjectaimed at is stored in
the memory. The apparatus is removed
from the eye and the resultof the measure-
ment is read off from the display panel.
The combination of MASTERSIX and
PROFI-spot can also be used for flash
readings. At the various measuring ang-
les, the followinglimitingvalues, related[o
21 DlN, apply to the apertures:
Measuringangle 10" f/5.6
                  5" f l112ls
                   1" f l322ls
The MASTERSIX monitors these limiting
values and automaticallyindicateswheth-
er you are over or under them.
The possible applicationsof this appara-
tus combination are further extended by
the  sensitivity ranges of modern  film
materials.
                                                                          PROFI-spot 59

Selected area measurement in practicewww.orphancameras.comWith many subjects, the contrast can be
                                           varied at random, and with others not. In
The preselectedmeasuring angles of 1o,  photography in pure daylight, the differ-5o and 10o are in accord with practical                                     ences between light and shade are fixed
photographic  requirements.  However,   quantities,which can of course be influ-illumination measurements made using                                    enced to a certain degree by brightening-the PROFI-spotand their applicationare                                           surfaces. Attention is drawn to the averag-only meaningfulin relationto photographic                                           ing of readings (pages 19 and 38).techniques. They are dependent on the
followingfactors:                     The MASTERSIXautomaticallycalculates                                          the mean value from up to 15 readings.
1. the subject contrast (contrast between                                                    ln many photographs taken  in  artificial   important bright and dark parts of the                                                   light, on the other hand, these differences   subject)                                       brought about by the illuminationcontrast
2. the natureof the film (negativeor trans-   can be controlledby changingthe lighting
   parency film) and its contrast perfor-   conditions.
  mance                                       Every film exhibits a typical contrast per-
3. the gradation performance of the com-   formance, depending on its exposure and
   binationof film and developing.             its  processing.  This  performance  is
These three influencingfactors are largely   expressed as its gradation curve. lt would
interdependent.                       be exceeding the scope of these instruc-
                                            tions to go into the influenceof develop-
                                              ing. Reference should be made to the
                                          relevantliterature.





60   PRoFt-spot


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      Technical data
      Measuringcircles                          Correctionfactors
       1", 5" and 10"     visiblein viewfinder     when switching   automaticallitaken
                                            angles            into account
       Indicationof                           Course of beam   divided parallax-free
     measuringangle  by light-emittingdiode                 beam (splittedbeam
       tn use          (LED) in viewfinder                           optic)
                                              Distance range   0.5 m to oo
      Total field of view approx. 15'               with additional                                                lens (2 dioptres) O.2m to 0.5 m
                                                         (Filterthread,       Sensitivityranges
      relatedto 21 DIN                       diam.35.5mm.      '10o        measuring      I exposure value         obtainablefronl
      angle                   - 2 I o 2 O                your photographic
      5o measuring   a exposure value         dealer)
      angle        O t o 2 2
        1" measuring      I exposurevalue        Eyepiece to adapt adjustableby -4  to
      angle           3 t o 2 5                      to observer's eye  +2.8 dioptres





                                                                          PROFI-soot 61

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PROFI-color
The PROFI-colorconverts your MASTER-
SIX into a colour-temperaturemeter. To fit
the attachement, remove the cover from
the MASTERSIX,slide the diffuserhemis-
phere to the middle, and join the two
together.
With the PROFI-colorattachmentfitted to
the MASTERSIX,you can measure col-
our-temperaturesin daylight and in artifi-
cial light.At the same time, it indicatesthe
conversionfilter appropriateto the situa-
tion and to the film being used.

Reading tolerance
Under normal measuring condilions,the
reading tolerance of the MASTERSIX/
PROFI-color combination is  less than
+ 1 decamired(^  + 1 filter value). For
such a measuringaccuracy,the illumina-
tion must be at least 10 lux. From that
minimum value up to around 100000 lux,
the colour-temperaturereading is practi-
cally independentof the illumination.
You can determinethe illumination,using
your MASTERSIX (page 44).


62   PRoFI-color

Film types                  www.orphancameras.comDaylight films  (T, D) for photographs in
                                      average daylight of approx. 5500 K or
Colour films are intended for specific kinds   5800 K are the most commonlv used col-
 of light: for "daylight"or "artificiallight". lf   our films. This type of film is al-sosuitable
the light for the photograph is othel than    for photographswith electron flash or blue
that.required for the type of film being   flashbulbs.
used, colour casts are produced, which   There are two different types of artificial- are  particularly disturbing with  colour    light films:reversal film. Photographs in shadow, for
example, are given a blue tinge by the   B and K  for photographswith photoflood
 light from the s-ky.                              lamps of approx. 3200 K.
                                 A         for photographswith photoflood
Colour casts of this type can be prevented           lamps of approx. 3400 K.by using appropriate filters (colbur-temp-
erature conversion filters). These trans-
     th.e"wrong" light to match the type off9rm.flrm Detngused.
Even when one wishes deliberately to
illuminatea photographwith "wrong" iight
to achieve certain certain colour effects, it
is importantto measurethe colourtemper-
ature of the light in order to be able to
foresee the effect on the image to a cer-
tain degree.
The colour composition of light, i.e., its
spectral distribution, is characterized by
stating the colour temperature in Kelvin
(K).


                                                                      PROFI-color63

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www.orphancameras.com                                   The film sensitivityset on the MASTERSIXBefore taking a reading
Remove the cover from the connection   has no significanefor the measurementof
sockets, slide the diffuser to the middle,   the colour temperature.The values stored
and    fit   the  PROFI-color  on   the     in the equipment for other functions are
MASTERSIX.                             also irrelevantto this measurement.
Select the COLOR mode with the FUNC-
TION slide-switch.The display panel will
show the colour temperature of the film
last set, together with the last reading.
Before the very first colour-temperature
measurement and  after each  battery
change, the display will show the values
preset by the manufacturer.
Using the  value change  switch, set
the colour sensitivityof the film you are
using, which will be marked on  its box
(e.9., 5500 K, daylightfilm).


                                                           I
64   PRoFt-color

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www.orphancameras.comBasically what is measured is the light fal-   The   filter  values  indicated  by  the
ling on the importan-tpart of the subject,  MASTERSIX are decamired differences.
i.e., one measures from the position of   They representthe difference between the
the subject in the direction of the light.   measured colour temperature and the
Hold the combined MASTERSIX and    ideal colour-temperaturevalue of the type
PROFI-color so that the light admission   of film set.
surface is pointingin the measuringdirec-
tion, i.e., towards the light source, taking
care that the light admission surface is
uniformlyilluminatedduring the measure-
ment. lf it is partly in shadow, a false read-
ing will be obtained.
Measure by pressing M.
Reading examples'
For a photograph with accurate colour
reproduction,a red filter R 6 must be used,
and the colour temperatureis 8700 K.


For your photograph you must use a blue
filter B 13, and the colour temperatureis
3200 K.


Pressing M displays the colour sensitivity
setting of the colour film to be used.                                              PROFI-color  65

                                                                                                                                ,l;rliii:*.

www.orphancameras.com
Exampfes of readings
Subject in sunlight:
Take your readingstowards the sun. The
colour temperatureof your light will vary in
the course of the day. Do not "filter out"
illuminationcreatingatmosphere,e.9., red
evening light.





OVercast sky (no sun):
Measure obliquely upwards towards the
sky,
Beware of passing clouds (even when the
sky is completelyovercast):readingscan
change very quickly.In this instance,there
should be a minimal interval between
reading and shooting.




66  PROFT-cotor

www.orphancameras.com Subject in shadow:
 The colour temperature is particularlyhigh
 in this case. Take your reading oblique-ly
 upwards towards th-esky. All sJnliqht'anil
coloured light should bb avoided"on the
 light admission surface, otherwise an
 incorrect reading will be displayed. Col-
 oqled..lightis produced, for bxdmple, by
 reflection from coloured surfaces' or by
tra.nsparentmaterials, through which the
subject is illuminated.
Subject in both sun and shadow:
Measure the light illuminatingthe impor-
tant part.of the subject: this-is geneially
the sun. In such a situationand riith such
great colour-temperaturedifferences, col-
our casts in the "neqlected" parts are
hardly  likely  to  be- avoided' without
supplementaryartificiallighting.This addi-
tional illuminationwill ha-vetd match the
colour temperatureof the main illumina-
tion.

Inaccessible subject:
Measure from a substitute point, receiving
as.nearlyas possiblethe same light as the
subject.

                                                                                                                                                                      . PROFI-color 67

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www.orphancameras.comFitting filters                                    Filter factors (exposure-increase
                                                factors)The  filter determined by the reading is
placed in front of the camera objective.  When using filters,the exposuretime has
Should such a filter, e.9., a red filter 9    to be increased, since the filters absorb
(R 9), be unavailable,choose the next    light.The so-called"filterfactors" are usu-
weaker, R 6. The same value can also be    ally marked on the filter mount, e.9., the
achieved by a combinationof filters,e.9.,   difference "21a"in stops or the factor " x4" .
R 6 + R 3 :  R 9 .                                              lf the filter factor is fed in the CORR mode
                                        before the subsequent exposure mea-To start off with, a set of filters, consisting                                       surement, you will not need to recalculateof two weak R-filters and one weak B{il-                                 when reading off the exposure time (seeter. will be sufficient.                                  page 13).





68   PRoFI-color

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Use filters correctly!                   Mixed light
The filters indicated by the PROFI-color  Photographstaken under illuminationby
only help to prevent colour casts produced    light with different colour temperatures are
by the "wrong" colour temperature.Other   rather tricky. All colour films are intended
colour casts may be caused, for example,    tor a particular colour temperature and
by improper storage or by the processing   cannot cope adequatelywith such mixed
of the film.                                       light.
!f you wish to achieve special effects, e.9.,   Care must also be taken with fluorescent
in the evening sun, a filter weaker than   lamps, sodium-vapour lamps, mercury-
that indicated by the PROFI-colorshould   vapour lamps and with coloured or multi-
be used, or no filter at all (dependingon   coloured light sources. This applies to
the effect intended and on the basis of   measurement and  to  the photograph,
experience).                            since the kinds of light listed have a diffe-
In doubtfulcases use a weaker filter!       rent spectral composition from the light
                                        from  incandescent bodies and cannotIncidentally,filtersof the same type (equal                                           therefore be measured with the PROFI-B-values or R-values) but made by diffe-                                               color.rent manufacturers,may look differentand
have different filter factors.





                                                                         PFtOFt-cotor69
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        More about colour temperature           For this reason, we need an objective
                                                  instrument,which can measure the colour
          Light is composed of rays of  different   or spectral distributionof the light. This
        wavelengths. In the spectrum (e.9. rain-    light "composition", which  is  of such
         bow), the individual wavelength regions   importance in  colour photography, is
        have their own characteristiccolours, viz.   characterized by the  "colour tempera-
         (from shorter to longer wavelengths) vio-    ture". The relationshipbetween "colour"
            let, blue, green, yellow, orange, red.   and "temperature" is provided by the
        Depending on  the  kind  of  light, the    properties of the light from incandescent         radiated proportionsof these spectral reg-                                                  bodies. With these bodies, the spectral         ions will vary in magnitude.For example,                                               compositionof the light, i.e. its "colour", is           light from an incandescentlamp contains                                                      clearly determined by the incandescence        more red radiationthan blue. In a blue sky,                                                  temperature. This temperature is called        on the other hand, blue radiationis predo-                                                    the "colour temperature" and is expressed         minant.                                                               in K (Kelvin) (K  :  "C + 273).
         This "spectral composition" of the  light
         governs the colour reproduction of the   The term "colour temperature" is, how-
           film. In a photographin shadow, for exam-   ever, also applied to light which is not
          ple, blue light from the sky, as the unique   directly radiated by incandescentbodies.
           light source, will produce a "blue tinge".     Stating a  colour temperature of, Say,
                                           10000 K for blue light from the sky means
        Our eyes are not capable of accurately   that this is the light that would be radiated
         judging the colour of the  light (i.e. its   by a body glowing at 10000 K.
         spectral composition),since our "subjec-
           tive" perception of colour always accords
         with the predominantcolour of the light.



         70   PRoFt-cotor

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