Light meters
Weston Model 819 Cine Exposure meter User manual
User manual for Weston Model 819 Cine Exposure meter. 10 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Weston
- Model / document
- Weston Model 819 Cine Exposure meter
- Document type
- User manual
- Language
- English
- Pages
- 10
- File size
- 0.5 MB
- Category
- Light meters
- Document date
- Not specified in catalog
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Page 3 · Read text
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WESTON
CINE EXPOSURE METER
c*_
Instruction Book
MoK8refor
Weston Electriccl lnstrument Corp.
Newqrk, N. 1., U. S. A.View original page 3Page 5 · Read text
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USING YOUR WESTON CtNE EXPOSUREMETEN
Correct exposure of motion picture film depends upon the proper correlqtion ,
oI the-emulsion speed oI the film-frames per second-type cqmerq, " A" or
"B"-operture opening. Co-ordinotion o{ these fqctor" mckes picture toking o
fcscincting, worry-Iree postime.
With your Model 813 you tqke cqre of the first three fcrctors when you lood
your cqmercr. Then you tqke a brightness recding of the scene. The correct
I: stop for thct scene lies directly opposite this brightness reqding on the
exposure guide.
A TYPICAT EXAMPTE
Assume, Ior exompl.e,_ you ore going to toke pictures in daylight with q
Type "A" camerq qt 16 fromes per second, using t lilm with c welton emul-
sion speed of 8 in daylight. (See enclosed folder for Weston Speeds.)
WHEN TOADING YOUR CAMENA
l. Set the bottom dicl to "TYPE A CAMERA,,. (See D)
2. Set the top diol to qn emulsion speed ol g. (See C)
3. Turn both top cnd center diols in unison, by meqns o{
the tob on the center diol. until the index points to 16
(fromes per second). (See E)
These settings remqin fixed until you use o diflerent film speed--frqmes
per second
WHEN TAKING YOUR PICTURES
4. Aim the meter qt the scene qnd note its recding. (Assume
this to be 12.) (See B)
5. Glqnce qcross to the exposure guide cnd you will find f:6.3
directly opposite the Relotive Brightness of 12. This is your
ccmerq setting. (See A.) Similcrly, for c brightness recding
oI l0 the correct cqmerq setting would be f:4.S, etc.
Remember thot the excmple given qbove is for explcnotion purposes only.
For your porticulor cqmerq cnd Iilm consult the cqmerq listings on the opposiie
poge cnd the film speed rqtings in the enclosed folder.
Page Two I ]View original page 5Page 6 · Read text
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TAKING METEB READINGS
The Model 8lg Exposure IVIeter actually "sees" the light refiected lrora q
25' ongle, which is opproximctely equcl to the cngle lormed by the hands of
q ciock when it is Iour minutes post twelve. This nqrrow ccceptcrnce ongle
permits the use oI the meter ct the cqmerq position for oll scenes of average
contrqst. Where extreme contrqst is encountered qnd detoil is desired on s
porticulor object it is cdviscrble to tqke q close-up reading from thot object.
This is especiolly crdvisoble for color photogrophy where the brightness ol
the mqin object is considerobly diflerent thqn the brightness of the bock-
ground. When photogrcphing o person, hold the meter within 18 to 20 inches
oi the fqce or, in general, twice qs fqr lrom the object qs the width of the object.
USE OF THE METER WITH COTOR FIIM
Color lilm hqs less lotitude thon blcck ond white emulsions ond it is there-
Iore necessory thot exposures for color Iilm be more criticqlly exqct thqn
exposures lor block crnd white film.
TIGHTING
Fiot lighting is recommended ot clr times when using coior film. Although
light controsts will produce pleasing effects with blcck cnd white film, excessive
light contrast on color film results in poor rendition of colors. Outdoor colo*
pictures should be tcrken on cleor, cloudless dcys. For indoor work corefuily
plon the lighting so that it is diffused evenly and llctly over the subject.
ACCURACY OF EQUIPMHNT
Tests on color lilm hove proved tllqt exposures must be correct to within
one (1) I: stop in order to obtain correct color rendition. However, the qccurqcy
oI even the highest grode photogrcphi.c equipment, including lens diophrogms,
ccrmerc shutters cnd exposure meters, mqy vqry in eqch cqse qs much os f oI
cr siop. II oll errors qre such thot they cqncel, no hqrm is done. But when they
oll tend towqrd over-exposure or unde..r-exposure, the lilm speed setting of the
meter moy be chonged to compensqte {or these equipmenl errors.
Page I'hreeI ]View original page 6Page 7 · Read text
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SIMPLE METHOD OF COMPENSATION
The Film Speed Vqlues in the toble below qre correct for cqrefully checked
equipment. If, with your cqmerq, under-exposure or over-exposure is con-
sistently obtained, chcnge the meter emulsion speed setting as follows. For
under-exposure (dense blues) try the next lower speed value. For over-exposure
(weok, thin colors) try the next higher speed vqlue.
These chonges in lilm vqlues ortificiully correct exposure to compensqie for
equipment errors. They should not be interpreted os representing qctuql
chonges in the lilm speed rcting.
RECOMMENDEDFILM SPEHDSFOR KODACHROME
Tests with ccrefully cqlibroted cqmerq equipment hqve resulted in the rec-
ommendqtion ol the following speed v.:lues qs q stqndqrd, or storting point
for determining the correct vqlues for your photogrcohic equipment.
8, 16 and 35 mm. Regulqr Kodqchrome
Doylight (with or without hoze fjlter) B
Tungsten (with filter)--......--......... 3
8, 16 crnd 35 mm. Type A Kodqchrome
Doylight (with Type A filter)...-. I
Tungsten t 2
PANORAMING
Pcrnorqming over qreqs which vcry greatly in brightness requires consider-
oble cqre when color film is used. Fr:r best results it is adviscble to toke
sepcrote reodings oI the bright ond shoded oreqs. Then, when octucliy tcking
pictures, chcnge the cqmerq I: siop, os indicqted by the meter, Ior esch different
set oI conditions.
Pase Four ] IView original page 7Page 9 · Read text
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CORRECTIONS FOR SHUTTE:ROPENINGS
Prccticclly all cin6 cqmerqs fcll into two groups, either A or B, qs listed on
poge I. However, certqin professionol cnd speciql cqmerqs cre equipped with
cdjustcble shutters or shutters which do not lotl into the A or B groups. The
simplest method of correcting lor these shutter openings is to chcnge the film
speed setting oI the exposure guide to the equivclent vclue given in the tsble
below. First set the exposure guide to the TYPE A cAMEnA position before
using the tqble.
Rated Film Speed ot vrhich to set Cin6 Exposure Meter
Film Cqlculotor for Vcnious Shutter Openings.
Speed Shutler Opening Degrees.
45 90 120 150 r80 zlo 240
1.5 1 . 5 2 2
2 1.5 2 2 2 3
3 1.0 1.5 2 3 3 3 4
4 1 . 5 2 3 3 4 4 6
6 2 3 4 6 6 6 8
a 2 . 8 4 6 6 8 1 2 1 2
T 2 4 6 8 12 12 16 16
16 5.6 8 12 12 16 t6 24
24 8 1 2 1 6 16 24 24 32
32 l l 1 6 2 4 24 32 32 48
48 16 24 32 32 48 48
Illustrqtion: Suppose_ the shutter cngle is 240 degrees qnd we crre using cr film
rated at 16. Refer to the verticcl column mcrked "Rcted Film Speed" ond-find 16,
then lind 240 in the horizontcrl column marked "Shutter Opening Degrees". Under
240 and in the sqme line qs 16 will be found the value 24. This is-the vclue at which
to set the film speed on the colculator. This oI course dces not mecrn the octual lilm
speed is speeded BP due to the lcrrger shutter opening but merely corrects for the
grecter qmount ol light received by the iilm becouse of the longei time the shutter
15 Open.
Note.' On comercs, hcving cdjustoble shutters the "Shutter Opening Degrees" will
usucrlly be found in the ccmercr instruction bocks,
The Ecrstmqn Kodcr-k-Cin6 Fpecicrl hqs shutter openings of opnroximotely lB0'forthe "Open" position, 90o lor "\h Ogen" oni 45o lor "Vt Open".
Pase Six I ]View original page 9Page 10 · Read text
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CAUTION NOTES
Keep glcss lens over the cell opening
cleqn.
During dry cold weqther the gloss on the
instrument is likely to become electrilied by
contqct with the hqnds or clothing. This ct-
trocts the pointer ond gives erroneous reqd-
ings, but the chorge on the gloss con be
eosily eliminoted by breothing upon it.
ZERO SETTING
OF INSTRUMENTPOINTER
When no light reaches the "electric eye"
the instrument pointer should rest directly
over the zero position on the scole.
If this is not the cose, qnd there is no
electrostqtic chorge on the gloss (see poro-
groph obove) then the pointer cqn be
reodily set to its zero position by slightly
turning the zero corrector loccrted below the
light scole.
When moking this correction ploce the
meter bqck downwqrd on q cord or q book
so os to exclude oll light Irom the photo-
electric cell, qnd hold it ot on qnqle of
qbo ut 4 5 ".
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PDF verified 2026-10-10.