Weston Master II Model 735 User manual

Page 1 · Read text

www.butkus.us

INSTRUCTION I}OOI/I


    WESTON
   v/{*tunfr
Model 735 UNIVERSAI
   EXPOSURE METER





   Veston Elecaical Inscument C,orp.
                                  S. A.      Newark 5, N. f" U.

View original page 1

Page 4 · Read text

www.butkus.us
IIITRODUGTION TO METERED PHOTOGRAPHY




                                                                                                                                                                                                                                                      i
                 EXPOSURE
         :vLIGHT


   Light  Atteetilng the FAlm                Exposure                                                                           Controls of Dxposure
  The liqht strikins the film in your      Exposure is the product of the lenqth                                                                             The controls of exposure qre the f/stopcqmero will vory not only becquse the      of time the liqht from the scene crcts on                                                                                        crnd the shutter speed. The f/stop con-Iight follins on the scene beins photo-     the film, muitiplied bv the omount of                                                                                                            trols the omount of light ond the shutterqrqphed vories, but olso becouse the      liqht strikinq it. At crll times this product                                                                               speed the lenqth of time lisht qcts on thereflecting obility of the scene chqnges     should be opproximotely the sqme Jor                                                                                                 film. The smoller the f/stop number, thefrom one scene to onother. Therefore     the sqme film. If the omount of liqhtyour exposure meter is desiqned to      is smqll, the time would be lons; if the      Iorger the operture. Shutter speeds writ-                                                                                        ten os 2, 5, l0 qre frqctions of seconds,meqsure reflected liqht, or briqhtness    omount of liqht is lorge, the time would                                                                         2 beinq Yz, elc.rqther thqn incident light.                be short.
                                                                  2

View original page 4

Page 5 · Read text

l. The Erposure Control lDio,l aaa
Tho ovnn"rtra ^v -nnr.^lv-,,uol .-li^lqtctl orl^- ycul exposure meter tronsiotes
the light reodings indicoted by the meter, into admFr- collinae
It is simple to use ond designed to give you the best possible
exposure for every type of scene.
, FilntSpeeds . . .
Film speeds dilfer from one film to onother; ond for different
kinds of illuminotion. Use the doyiight speed of the 1ilm
listed in lhe enclosed booklet when photogrophing in nottrrql
liqht, the lungsten volue lor phctoflood ond mozdo l.rmps. Sot
tht: film specd diol in occordonce with insfnrclions "C" n roc l.
3. Holdittg The lWeter . . .
Hold the meter ony woy nolurol to you, but be sure nct to
clstruct the cell with your fingers. Also be sure the neck crrd
does not iie qcross the cell opening, for this loo woulcl re,sult
in on incorrect reoding. Be sure to observe lhe precoutions crnd
other suggeslions in reference to oiming of the meter in the
fc.,liowing porogrophs.
4. Atter Settirtg IDitil . . .
Afler setting the diol to the light volue of the scene, ony
ccmbinotion of f/stop ond shuiler speed directly opposile eoch
other will result in correct exposure. If lhe scene is on oclion
one, o fcrst shutter speed should be chosen, ond hence the
f,/stop direcily opposite is used. If moximum depth of iield is
needed, thon o smoll operture is required, (lqrge f/slop num-
ber), hence the shutter speed directly oppcsite is used.
3

View original page 5

Page 15 · Read text

lO.Lighting . . .
when controst q extreme set-up liqhtinq of Do not use EOUIPMENT ERRORS provide omple contrqst photogrophing itself Color will color. in
in the picture. Too greot liqhtinq controst results in q scene
beyond the ronge of the film, mqking correct exposule for oll All photoqrophie equipment is mqnufoctured to occurocy
objects impossible. tolerqnces which mqke it possible to produce this moteriql in
quontity. These tolerqnces result in smoll errors in shutter ll. Time of IDag . . . speeds ond f/stops. Usuolly these errors concel eqch other.,
Before l0 A.M. ond ofter 3 P.M. certqin conditions moy But it is possible for them to be odditive resultins in con- indicote use of color correction filters. It is suggested thot sistently over or under exposed color pictures. If your instructions of film mqnu{qcturers be foliowed. pictures indicote such errors, chqnge the listed film rotings,
consistently under exposed ond rqising 12. Subieets fro Shade . . . lowering them if them if over exposed. A test of q few exposures qt different Do not photogroph shoded subjects in color. The shoded film speeds oll of the some scene is helpful in determininq if portions of the scene ore lighted by reflected sky light rother
thon sunlisht. Sky light is bluer thon the sunlight Ior which such compensqtion is necesscry.
the Iilm wqs bolonced.

View original page 15

Page 16 · Read text

CINE' PHOTOGRAPHY GAREwww.butkus.usOF THE EXPOSURE METER
A cin6 comerq is theoreticclly the some os ct still one. Your new exposure meter is rugged ond well mqde. But
It hos vorious f/stops to control the quontity of liqht entering Iike o fine wqtch, which it resembles in mony woys, normol
the comera, ond a shutter to control the durotlon of exposure. core shouid be given.
The moin difference is the foct thot the cin6 comero mqkes o If your meter hqs been domoged, pock it corefully' Do
series of pictures one qfter onother of the some scene. The not send carrying ccses, booklets, etc. Return to:
theory of exposure is the some in both cqses ond the use of Service DePortment,
the exposure meter is identicol. WESTON ELECTRiCAL INSTRUMENT CORP.,
l/30' opposite directly is found meter exposure the Since the Newqrk 5, New JerseY, U. S. A. second, frqmes per photog- At 32 for cin6 sqmeused the
rqphy qs for stiil, oll methods shutter speed will be twice thot Or through your regu.lor photogrophic deoler'
described before ore correct. The ot 16, or 1/60th of o second. At Prompt ottention is poid to oll domoged meters. Chorges be hou speed will the frqmes, B brightness is thebest method qre nominol, dependinq upon the qmount of work needed. the Note qre greot, or 1/15th. os reqdings two whereinronge
mqde ond the cqmercr settings toble.
determined by setting the Arrow Fromes per Shutter I)o Not Oaerheat l?.leter!
position midwqy between. second speed Normql or even qbnormql summer
\r\IhanYv rrsrf PurrrrrrrY,nanninn be Sure to B 1/ 15 temperotures will not horm the
chonge exposure setting if the 16 l/30 meter. But do not store in cr hot
liqhtinq in one port is moteriollv 24 l/45 ploce such os on o rodiotor or in
ailterent Irom thot in onother. 32 l/60 the glove comportment of o cor.
Mqke meter reodings in both 48 1/90 Likeports of the scene ond chonge If the shutter speed is not Do Not llrop l?leter!
the comero settings when the mqrked on the exposure meter o wotch, the jeweled beorings
comero views o lighter or dorker control diol. use the neorest num- qnd exoctly shoped Pivots moY
portion of the scene. ber on the diol. For exomple, be domoged by o {oll.
be could hos cr l/45th movie cqmercr Every considered Do Not Subtnerge Nleter! relotionship The sqme I/ 40th. speed. Usuolly shutterdefinite
this is given for the normql opplies for ccrmercrs hoving q Your meter is moisture Proofed,
"fromes per second" of 16. For shutter speed different Irom thot is woter vopor in the oir
exomple, 1,/30ih of q second. l/30th of q second ot 16 fromes, will not horm it. However it is
After the exposure control diol is for exomple l/40th qt 16 frqmes, nct woterproofed, so don't droP
set the correct f/stop will be or l,/50th. it in the loke.
14

View original page 16

Page 18 · Read text

Computing Drposure ln puted with the Exposure Controlwww.butkus.usDiol in nqturol liqht, ond tungsten, or incqndes-
the following monner: cent liqht. Daylight meqns cll types ofClose-llpWorlc . . . (l) Assume o 4-inch focql lenqth lens with nqturcrl liqht whether the dcry is sunny or
(A) Set the Exposure Control Diol of the c film in use hcrving q Weston Film Speed cloudy. Tungsten meqns photofloods ond
Meter to the film speed specified for use of 4, the briqhtness reoding os suggested the regulor incondescent lomps used in
with the white cqrd reodins. if film beins crbove on the white cord to be one block some types of spot ond flood lomps. Use
used is other thon types designed for below 100. Let us select the exposure of dayliqht rotinss with doyliqht type fluo-
"white cqrd reqding," divide the film rct- 1/10 second ot f./6.3. rescent lamps.
inq by 5, using neqrest film speed on the (2) Meosure the new focql distqnce 0ens- WestonSpeeds . . .Control Dicl. to{ilm) of the copy setup in inches, a.e.,
(B) Ploce q white cqrd in copyins posi- 9 inches. Weston Exposure Meters are colibroted
tion, directly on subject to be copied. (3) Aliqn shutter speed selected in step in terms of Weston film speeds porticu-
(C) Toke cr close-up briqhtness reoding of l, I/I0 second, with the f/stop volue lorly compiled for you, the photogropher.the white cqrd. which is equol to the lens focql lenqth in It is cr photoqrcpher's stondord devel-
(D) Ploce the Normql Anow on the Ex- inches, f./4. oped over 15 yeors oqo by Weston which
posure Control Dicrl opposite the briqhf (4) Opposite the f/stop vqlue which is hcs proven to be the key to the solutionness reqding obtoined, qnd then select equcrl to the new focql distonce in inches, of modern exposure problems. In o new shutter modern lqborqtory equipped qnd stoffedthe exposure in the usuql monner. f/9, will be found cr corrected
crs \Mhere the subject-to-lens distonce is speed volue, r/z second, to be used with for the purpose, film somples, secured the f/volue selected, f./6.3. you secure them for every doy use crreless thcrn B times the normql focol lenqth (5) Aliqn the corrected shutter speed, Vz processed to determine the ratings. Notof the lens, the indicoted operture vqlues second, crnd the cperture selected, f./6.3, only in the loborotory but qlso in thedo not hold true and thus a corrective and cny of the exposure combinotions field, film speeds cne crccurqtely ond im-shutter speed must be computed. oliqned mcry be used, e.g., 2 second crt porticlly determined qnd checked for
In this computction, if the focol lenqth f./I2.7, I second oitf.f9, I/5 sec. c;tf./4, etc. your informotion. Even the best exposureof the ccrmero is in inches, millimeters, meter is worthless with improper filmcentimeters, etc., then the new focol dis- Illuminutiott os. Speed . . . speed vqlues ond in Weston Film Speeds
tcrnce must be mecrsured in identiccl Film sensitivity vcnies with the type of qnd the Weston Exposure Meter you
units. The corrected shutter speed or effec- illuminotion to which it is exposed. There- have the two fqctors to insure correcr
tive operture opening cqn then be com- fore o given film is roted for doylight, or exposure.
16

View original page 18

Page 21 · Read text

Note the following recommended Ex' position, the reoding mcy be mode qt ing contrqst, rqnge of the scene qnd
posure Control Dicl settings for typical the latter, retqining the sqme direction the exposure determined with emphqsis
scenes. of qiming the meter in relqtionship to plcced on the objects of interests, cqn
TYPE OF SCENE DIAL SETTING the subject-cqmerq cngle. However, qll be cccomplished by one set of reqd-
Average, where high' Set NORMAL AR- when the qreq to be photogrcphed is ings with the Reflected Light Meter. It
lights ond shqdow qreqs ROW to recding ob- composed of both sunlight cnd shcde should remqin the bqsic tool of the ore evenly distributed . . . tqined on the meter qreqs of equcl proportion or importqnce, photogrcpher in view of its versotility. groups of people, portroits sccle.
or similqr subjects . . . qll q reqding should be mqde under eqch
color work. illuminotion condition qnd the qrrow No one method of exposure determi- Set "A" the cs such Flotly lighted, eqse of opero- posi- plcced midwoy between the vqlues in- nqtion is q cure-oll. The recding using the to tion where landscopes tion of Incident Light reqdings in- blqck-cnd-white film. obtcined on the dicqted. For indoor work under qrtificicl
meter scqle. illuminction the recding must be mqde creqses the scope of cpplicction of the
Controsty, dcrk object or Set the "C" posi- close to the subject, cs the light qt the Exposure Meter. All cre subject to fcil- recding tion to the subjects where shcrdow the cctmerq position usually differs from ure under certqin conditions when not on obtqined or crreqs predominote where good shcdow detcil meter scqle. thct qt the subject position. in the hqnds of the cqreful worker, yet is desired. in the hqnds of the skilled worker, qll
e The scope of the meter hqs been in- perform on importcnt part of his cppli- The INVERCONE integrctes cll the under cqtions. Under identiccl light and sub- light regqrdless of the number of the creqsed to fccilitqte reqdings
I qnd provides ctn ject conditions the two methods mqy lights or their position. Therefore in certqin conditions,
qn outdoor scene, the meter should be ecsier meqns of controlling the lighting give slightly divergent results, yet this
qimed towqrd the cqmerq from the sub- contrqst rqtio. It does not, however, is the phcse of photogrcphy where the
ject position, thus tcking into considerq- eliminqte the necessity of determining careful worker, hcving cclibrqted his
tion the light folling on the subject. whether or not the brightness rcnge of equipment, applied his experience, de-
Under conditions of identical illuminc- the scene exceeds the reproduction parts into the esthetic or qrtistic phase
tion qt both the subject qnd cqmerq limits of the film. Frequently the light- to qccomplish the desired results.

19

View original page 21

Page 22 · Read text

www.butkus.us
 GARE OF THE INYERGONE                 NOTES.
  The two components of the INVER.
CONE qre durcrble, yet qs cll photo-
graphic equipment, should receive req-
sonqble cqre. The Inverted Cone
should not be sncpped into plcce, but
by holding the boffle agcinst the reqr
of the meter, it will be found to slide
smoothly into place. Both pcrts ccn
recdily be clecrned with socrp qnd luke
wqrm wqter if they become dirty cnd
qffect the light trqnsmission.

View original page 22

Page 23 · Read text

\ffeston Model 735 ExPosure Meter is
protected hy the following United States
and Foreign patents.
             United States
                  2,1.57,466
     1,982,406    2,274,U1
    2,U73,79O   2,546,553
               Ganadian
        847             4rrp76       fr55
                    British
                 531,996
          Other Patents Pending

View original page 23

Document details

Search available document text