Light meters
Minolta Color Meter User manual
User manual for Minolta Color Meter. 16 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Minolta
- Model / document
- Minolta Color Meter
- Document type
- User manual
- Language
- English
- Pages
- 16
- File size
- 4.8 MB
- Category
- Light meters
- Document date
- Not specified in catalog
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Page 5 · Read text
SPECIFICATIONS
Type: Incident-light, 3-color-measuring type color temperature meter for
professional use, featuring high compactness, one-hand operation,
direct MIRED, Kelvin-Degree, and built-ln balancing- and correction.
filter reading, and high accuracy over an unusually wide illumination
range
Blue-Red: For measuring color temperature and selecting L.B. filters
Measuring Ranges: T1: 4O0-3O0 MIRED (2500-33OO"K)
T2: 362-263 MIRED (275O-3800"K)
Dl:27O- 170 MIRED (3700-5800"K)
D2: L80-80 MIRED (5560-12500'K)
Scale range: From MIRED to +50 MIRED on a single -50 equal-distance scale
Accuracy; *5 MIRED
Green-Red: For selecting C.C. filters
Measuring Range: 3OO-80 MIRED (3330-12500'K)
Accuracy; *12 MIRED
lllumination x 1 setting: f O- 128O luces
Measuring Range: x 100 setting: 10OO-128O0O luces
on same log scale
Accuracy: Wlthin +0.2 EV
Lieht receptors: 4 flat-type silicon blue photo-diode detectors
Power source: 5 1.3v mercury batteries, i.e., Mallory RM 625 or equivalent
Size and weight: L52x72x54mm (6x2%x2% in.);500e Q7.6 oz.)
Accessories: Case and neck strap
Other: Needle automatically locked in place when reading button released
Battery-check button
One-hand operation
Zero-adjustment screw
Correction filter, Lux, ft-C conversion scales on back of bodyView original page 5Page 6 · Read text
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BEFORE USING THE MINOLTA COLOR METER
Settlng Zero Adjustment of Meter
Before installing batteries in the meter,
check zero reading by depressing reading
button.
lf needf e rests exactly on zero graduation on
MIRED scale, no zero adjustment is neces-
sary. lf needle is to left or right of zero line,
turn set screw on back of meter as necessa-
ry to properly adjust zero reading registered
when reading button is depressed.
CAUTION:
o Be sure to make zero adjustment before
installing batteries.
O Turn the set screw only little at a time.View original page 6Page 7 · Read text
Installlng Batteries
l. Remove battery compartment cover
from rotating receptor head by grasping
the cover's grooved rim and unscrewing
it counterclockwise.
2. Insert five PX-625 type batteries into
the two battery chambers with plus and
minus sides positioned as indicated.
3. Replace the battery cover by first posi'
tioning the alignment pin located inside
of cover in the hole of the batterY
chamber and then turning the cover
clockwise.
o Before installing the batteries, clean both
sides of each battery with a dry cloth.
o Then be sure not to touch battery ter-
minals with moist or soiled hands. lf
contaminated, the battery contacts can
deteriorate, and batteries may not work.
a lf the Color Meter is not to be used for
two weeks or more, remove the batteries
and store it in a cool, dry place.View original page 7Page 8 · Read text
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Checking Batteries
1. As in making initial check above, depress
the reading button and the batterycheck
button simultaneously from time to
time to check condition of batteries.
2. lf indicator needle stays within the red
B.C. (battery check) zone at the right end
of the illuminance scale, battery can
be regarded as functioning properly. lf
needle registers reading outside B.C.
zone, replace all the batteries with new
ones at the same time.
Be sure to push both the reading button
and the battery check button all the way
in and at the same time.View original page 8Page 9 · Read text
HOW TO USE THE MINOLTA COLOR METER
Setting Meter for Light Source(s)
The smallest center dial of the Minolta
Color Meter is marked for four click-stop
measuring positions (TL, T2, D1, D2) that
enable you to set the color temperature
measuring range of meter to suit light
source(s) being used. Before making color
II temperature measuring readings, turn the
knurled-rim knob of the small center dial to
align index with the designation of the rangeI/"S that include the color temperature of your
light source(s).
Setting for Film Type
1. Then lifting up on center dial-knob
mentioned above to disengage it from
moving dial and index, turn it until the
small red triangular film-index pointer is
set on the letter for type of film being
u sed.
2. Types of film indicated are Type B (bal-
anced for exposure under illumination of
3200'K), Type A (for exposure in 3400"K
light), Type F (for exposure at 3800'K)
and Daylight Type (for exposure in
light of 55OO'K) with Kodak f ilms. Other
intermediate values can of course be set
to suit barance of other film makes and
types.
CAUTION:
O Be sure not to forget setting the meter
for film type, or you will be unable to
obtain true color temperature readings.View original page 9Page 10 · Read text
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Ghecking Llght Intensity
With the Minolta Color Meter, a minimum
lieht intensity of 3 foot.candles ( 32
luces) is necessary to obtain accurate
color temperature measurements.
1. To check light intensity, set the function
selector lever located beside the reading-
lock button on the side of the meter so
that the dot is aligned with the letter "l."
2. Point the receptor at the light source and
depress the reading button.
3. lf the needle indicator registers within
or to the right of the black portion of
the illuminance scale located above the
MIRED scale, this indicates that there is
sufficient light to permit accurate color
temperature measurment.
NOTE:
O Because of unique circuit design, the
Minolta Color Meter offers accurate color
temperature measurement over an un.
usually broad range of light intensity.
This means that changes in distancefrom
the light sources will not affect accurate
color temperature readings, unless light
intensity drops below the minimum level
mentioned above.
O When making intensity readings, be sure
that the illumination range selector on
the head of the light reeeptor is set at its
1X position.View original page 10Page 12 · Read text
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Determining Light Balancing Filter(s)
Once a B/R ratio reading has been made
and the red index line matched with the
needle refer to the conversion table on back
of meter to convert the light balancing filter
reference number indicated by main index
to an actual filter indication.
For example, if a blue LB reference num-
ber of 5.5 is indicated, filters needed for
proper color balance would be one No. 82
and one 82C. lt may be necessary to combine
two or more filters to equal a total value to
match or approximate the reference num-
ber. For reasons of optical performance,
however, it is recommended to combine as
few filters as practicable-preferably not
more than two-to obtain proper color bal-
ance.
Green/Red Ratlo Readings
G/R ratio readings are of primary import-
ance under fluorescent, certain dischange-
lamp, or mixed lighting conditions. For mea-
surements under such conditions. it is
necessary to combine the color correction
(CC) filters indicated by G/R ratio measure-
ment with the necessary light balancing
filters called for by the B/R ratio reading.
1. With the main index in the position to
which it was set in making the B/R read-
ing, turn function selector lever to G/R
position.View original page 12Page 14 · Read text
www.butkus.us Selecting Light Balancing Filters and G C Filters As already mentioned, the back of the mended for best results that, if practicable, 11 Minolta Color Meter provides a conversion you select for use a single filter that comes table f or selecting correct f iltration to obtain closest to the reference number indicated, properly balanced color rendition. Scale rather than two filters. However, when the values on front of meter are reference num. reference number exceeds 4.5 on the blue bers for use with this table to determine LB scale or 5.3 on the yellow scale, it will be or CC filters needed. necessary to combine two filters to attain B/R ratio readings refer to the reference the degree of filtration indicated. numbers in the LB filter window. These The above also applies to selection of CC reference numbers are shown on blue or filters after the G/R reading. Here reference yellow scales. Convert these reference num- numbers are shown on green and magenta bers to filter designations by referring to scales and should be converted to CC filter the conversion table on the back of the me- values using the conversion table on back ter. The letters "Y" and "B" designate yel- of meter in which green-scale readings are low- and blue-scale reference numbers, res- indicated by G and magenta ones by M. pectively. To keep to a minimum the required num. When making conversions, try to mini. ber of filters for color correction, it is im. mize the number of separate color filters portant that the photographer seledt the to be used. You should not use more than film best suited to his light source(s). two filters in combination. lt is recom-View original page 14
Page 16 · Read text
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llluminance readings indicated by the 13
needle can be read directly and used in the
scale unit or converted to EV values through
use of the table on back of meter.
For EV numbers at lOOX sensitivity, add
EV 6.6 to EV numbers shown on conversion
chart which is calibrated for lX readings
only.
For exanrple, the table will indicate EV 7
for a needle reading of 29.7 foot candles or
32O luces. Simply add EV 6.6 to EY 7 for a
total correct reading or EV 13.6 if selector
is set at IOOX.
CARE AND STORAGE OF YOUR MINOLTA COLOR METER
Be careful not to touch the surface the lf you have any questions, ask your
incident receptor. lf it becomes soiled, use Minolta dealer. He is knowledgeable in all
a rubber ball blower to blow dust from its aspects of photography, and he can help you
surf ace, then gently wipe it with a soft cloth with all of your photographic needs.
or tissue.
Minolta Camera Co., Ltd., 18, 4-chome,o Try to keep the receptor clean, brush it Shiomachidori, Minami-ku, Osaka, Japan
with a soft brush from time to time. Minolta Corporation,2OO Park Avenue South
O The Color Meter should not be subjected New York, N.Y. 1OO03, U.S.A.
to shocks or vibration. M inolta Camera Han delsgesellschaft m. b.H.,
o Do not store the Color Meter in high 2 Hamburg 1, Spaldingstrasse 1, West
temperature or humidity. Germany.
O When leaving the Color Meter unused
for a long time, remove the mercury bat-
tery from it.
o When storing the Color Meter for a long
period of time, it should ideally be placed
in its original package and sealed in an
air-tight container with a small bag of a
drying agent such as silica gel.View original page 16From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
PDF verified 2026-10-10.