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STUDIO DELUXEⅢL-398A
Operating Instructions
This manual uses the following safety labels for WARNING andCAUTION that you must follow.
Indicates hazards or unsafe practices that can re-sult in severe personal injury or death.
Indicates hazards or unsafe practices that can re-sult in the personal injury or damage to your L-398Aexposure meter.
• Keep Lumisphere, Lumidisc, Lumigrid or High-slide out of reach of young children, as swal-lowing such objects can cause suffocation.
• Please place in a location where an infant can-not reach and accidentally get the strapwrapped around his or her neck. There is adanger of strangulation.
• This L-398A has a powerful magnet. Do notplace it close to the following materials, other-wise the data stored may be damaged or theproducts may malfunction:Cash cards, floppy disc, other magnetic cards,TV Set, CRT display or LCD, and other appa-ratus sensitive to magnetic fields.
SAFETY PRECAUTION
CAUTION
CAUTION
WARNING
WARNING
SAFETY PRECAUTION
CONTENTS
1. Features …………………………………………………… 1
2. Specifications ……………………………………………… 3
3. Part Designations…………………………………………… 4
4. Accessories ………………………………………………… 5
5. Basic Operation of Meter Unit …………………………… 6
1. Stopper Button Operation …………………………… 6
2. Zero Position Check and Adjustment ……………… 6
3. Memo Pointer Operation……………………………… 7
6. Standard Accessory Operation …………………………… 8
Incident Light Measurement ……………………………… 8
1. Lumisphere …………………………………………… 8
2. Lumidisc …………………………………………… 11
Reflected Light Measurement ………………………… 12
1. Lumigrid……………………………………………… 12
Other Operations ………………………………………… 14
1. Exposure Value (EV numbers) Readout ………… 14
2. Employing Cine Scale……………………………… 14
3. Using Exposure Multipliers (-2, -1, +1, +2) ……… 15
7. Optional Accessories Operation ……………………… 16
1. Direct Reading Slides ……………………………… 16
2. Direct Reading Slide Application ………………… 17
8. Handling Cautions ……………………………………… 18
CONTENTS
1
Nearly all photographic subjects combine complex variations ofstrongly reflecting surfaces (high reflectivity) and weakly reflectingsurfaces (low reflectivity). These variations delicately influence expo-sure determination and to which portion the exposure is set becomesa vital factor that considerably affects the appearance of the finishedphotograph.Although risk of failure can be minimized by taking maximum andminimum readings of all portions of the subject, then averaging thevalues, such an approach is both time consuming and tedious. TheStudio Deluxe Ⅲ is the answer to this problem.1. Optimum exposure meter for incident light measuring method (also
applicable for reflected light method.)2. Freely rotatable light sensor section for very easily performed
measurements.3. Meter stopper mechanism allows operation while hand is released
from meter.4. Meter release mechanism is also included which allows the needle
to deflect freely. This provides greater convenience when deter-mining light balance.
5. Memo pointer enables easier light balance setting.6. Lumisphere detects the same light as strikes the subject. Since
subjects are normally 3-dimensional, according to the lighting con-ditions, brighter surfaces (highlights) and darker surfaces (shad-ows) are produced (illumination contrast). The Studio Deluxe Ⅲmechanism automatically takes into account the strength of lightfrom all directions, causing the meter to indicate a value appli-cable to photography. It is thus most convenient for determiningtypical exposures.
7. After combining film sensitivity and shutter speed, direct readingslides (optional) can be used for directly determining the aperturevalve.
8. AMORPHOUS PHOTOSENSOR is employed as light sensingelement, eliminating need for battery.
9. Wide selection of available accessories allows numerous photo-graphic techniques to be enjoyed.
1. FEATURES
2
211
.40510
20
2.8
4080
4 8
320
16640
1.25K
5.6
INCIDENTLIGHT
160
• Your L-398A has a powerful magnet. Do notplace your L-398A close to the followingmaterials, otherwise the data stored maybe damaged or the product may malfunc-tion: Cash cards and other magnetic cards,floppy disk, TV Set, CRT display, and otherapparatus sensitive to magnetic fields.
Caution:
AMORPHOUS PHOTOSENSOR
BACK LIGHT
MAIN LIGHT
LUMISPHERE
FILL-IN LIGHT
MAGNET
MICROAMMETER
1. FEATURES
3
Analog exposure meter for ambient light
Incident light and reflected light
Incident light: Lumisphere and Lumidisc
Reflected light: Lumigrid (30 deg. of light
receiving angle )
Incident light: EV4 to 17
Reflected light: EV9 to 17
ISO 6 to 12,000 (in 1/3 step)
60 sec. to 1/8000 sec. (in full step)
F0.7 to F128 (in 1/3 step)
8, 18, 24, 64, 128
EV1 to 20 (in 1/3 step)
Incident light: C=340 (Lumisphere),
C=250 (Lumidisc)
Reflected light: K=12.5
0℃ to 40℃
-20℃ to 60℃
112(H)× 58(W)× 34(D) mm
Approx. 190g
2. SPECIFICATIONSType
Light receiving method
Light receiving section
Measuring range
(ISO 100)
Film speed
Shutter speed
Aperture value
Cine speed (f/s)
EV (Exposure Value)
Calibration Constant
Operating temperature range
Storage temperature range
Dimensions
Weight
Note: Features and specifications are subject to change without notice.
4
510
20 40 80 160 320 640 1.25k
-2-1
+1 +2 -2 -1+1
+20・・11・・1
2 EV
Studio DeluxeⅢ
L-398A
1.25k
640
32016080
4020
1050 228 4 56 8
11
1611.460
30158
42
1
28 15 30 60125 250
5001k
1/SEC
8k4k
4
2k
10050
200
ISO
8 18 24 64128
CIN
E12890
64
45 32 22 16 11 8 5.6
2.8
4
21
0.7F
1.4
H
3. PART DESIGNATIONSFront
Rear
Footcandle scalee
EV scalet
Dial ring!6
Scale marki
Stopper button!3Stopperbutton mark!9
“H” marko
EV marky
Film sensitivityselector knob@0
Memopointer!7
Needle!8
ISO mark!1
Strap eyelet@5
Dial scaleu
Lumispherq
Light sensorw
Aperture value(for direct reading)r
ISO scale!0
Cine scale!2
Aperture scale!5
Zero adjust screw@1
Shutter speed scale!4
Meterscale
Dialscale
5
Total of 11 direct reading slides(set of 11 slides in case).
• Keep Lumisphere, Lumidisc, Lumigrid orHigh-slide out of reach of young children,as swallowing such objects can cause suf-focation.
Warning
4. Accessories
No. 5
HIGH
Lumisphereq
Lumidisc@3
Lumigrid@4
High (H) slide@2
Optional Accessories(sold separately)Direct reading slides.
6
5. BASIC OPERATION OF METER UNIT1.Stopper Button OperationIf the stopper button !3 is pressedwhen the stopper button mark !9
is set to ○ , the meter needle !8
deflects according to brightness.Then when the button is released,the needle remains fixed at theindicated position.By holding the stopper button de-pressed and turning it clockwiseso that the mark position becomes○ , the needle is released.At this time, the meter will deflectfreely even if the stopper buttonis released. To fix the needle, turnthe stopper button counter-clock-wise to where the mark is posi-tioned ○ .
2.Zero Position Check and AdjustmentWith stopper button in released ○position, cover light sensor withhand or black cloth to completelyblock light. Check that meterneedle !8 correctly indicates zeroposition. If the indication deviatesfrom zero, while observing meterindication, use a coin or similartool to turn the rear zero adjustscrew @1 and adjust for zero indi-cation.
510
20 40 80 160 320 640 1.25k
-2-1
+1 +2 -2 -1+1
+20・・11・・1
2 EV
S e 1.25k50 2 11
1611.4
10050
200
603015
84
21
2 60125 250500
1k1/S
EC
8k4k
2kISO
8 18 24 64128
CIN
E12890
64 82
10.7
F1.4
H
510
20 40 80 160 320 640 1.25k
-2-1
+1 +2 -2 -1+1
+20・・11・・1
2 EV
S e 1.25k50 2 11
1611.4
10050
200
603015
84
21
2 60125 250500
1k1/S
EC
8k4k
2kISO
8 18 24 64128
CIN
E12890
64 82
10.7
F1.4
H
510
20 40 80 160 320 640 1.25k
-2-1
+1 +2 -2 -1+1
+20・・11・・1
2 EV
Studio DeluxeⅢ
L-398A
1.25k
640
32016080
4020
1050 228 4 56 8
11
1611.4
603015
84
21
28 15 30 60125 250
5001k
1/SEC
8k4k
4
2k
10050
200
ISO
8 18 24 64128
CIN
E12890
64
45 3
2.8
4
21
0.7F
1.4
H
・
・
・
・
Black cloth
7
5. BASIC OPERATION OF METER UNIT
Dial3.Memo Pointer OperationRotate both Dial Ring !6 and dialof Memo Pointer !7 to align withNeedle !8 position or desirablesetting position.※ See page 11 for actual use.
Memo Pointer
8
6. STANDARD ACCESSORY OPERATION
10050
200
603015
84
21
20 60125 250
5001k
18k
4k
4
2kISO
8 18 24 64128
CIN
E
9064 2.8
2
Incident Light Measurement1. Lumispherea. Mount Lumisphere q to light
sensor w. To mount, alignwhite dots of Lumisphereframe and light sensor, thenturn Lumisphere carefullyclockwise (approx. 45 deg.)tosecure.
b. Set film sensitivity knob @0 tosensitivity value of employedfilm. Set ISO value to rightside ISO mark !1.Photo shows setting for ISO100.
c. From position where subjectis to be measured, pointLumisphere q in direction ofcamera. (Light sensor w canbe turned freely.)
9
6. STANDARD ACCESSORY OPERATION
5 10 20 40 80 160H
+1 +2 -2 -1
Studio DeluxeⅢ 1.25k
640
32016080
4020
1050 228 4 56 8
11
1611.4
L-398A
5 10 20 40 80 160 320 6401.25k
-2-1
+1 +2 -2 -1+1
+27 ・・ 8 ・・
9 EV
Studio DeluxeⅢ 1.25k
4021050 22
11
1611.4
10050
200
603015
1/SEC
8k4k
2kISO NE
12890
64
H
d. Hold meter erect and press stopper button !3. Meter needle !8
deflects according to brightness. When the stopper button is re-leased, the meter needle becomes fixed at the deflected position.If the location is excessively bright and the meter needle deflectsbeyond scale, insert the High slide @2.
510
2040
80 160 320 640 1.25k
-2-1
+1 +2 -2 -1+1
2・・13・・1
4 EV
Studio DeluxeⅢ 1.25k
640040
201050 2
28 4 56 811
1611.4
10050
200
603015
84
21
28 15 30 60125 250
5001k
1/SEC
8k4k
4
2kISO
8 18 24 64128
CIN
E
12890 64 45 32 22 16 11 8
5.62.8
42
10.7
F
1.4
H
e. Read the footcandle scale eof the meter needle.
f. Transfer footcandle value tothe dial scale u. Rotate thedial ring !6 and set the ▲scale mark i. If the High slide@2 has been inserted, set the mark o.▲H
10
g. At this time, the shutter speed scale !4 and aperture scale !5
combination becomes the correct exposure.Example:With High slide inserted, meter indicates 80 footcancles.
At ISO 100, the proper exposure becomes 1/250 sec at F/5.6, 1/30 sec at F/16 and 1 sec at F/90.
h. By changing ISO setting, the set combination of shutter speedand aperture scale is automatically altered to the appropriate onecorresponding to the changed ISO value.
※ Meter scale intermediate values
6. STANDARD ACCESSORY OPERATION
Footcandles
1.25k
640
32016080
4020
1050 228 4 56 8
11
1611.4 2
4 6
128
1625
5064
100125
200 250
400 500
800 1k
2.8
42
12
8 1015
3025
6050
125100 200
400 800
250500
1k
1.6k
1/SE
C8k
4k
4 5
2k
128112110
8072
5650
4036
28
2520
18 14 13 10 9 6.47.1 5
3.6
2.5
1.8
1.30.8
4.53.2
2.2
1.61.1
0.9
9064
4532
2216
11 8 5.6
2.8
4
2
10.
7F
1.4
6810
1620
3240
6480
125160
250320
500640
1k1.2k
2.5k2k
4k 5k 8k10k
12
25
50
100
200
400
800
1.6k
3.2k
6.4k
12k
ISO
※ Film sensitivity intermediatevalues
※ Intermediate values forShutter speed and ap-erture scale
11
2.LumidiscEmploy for illumination contrast adjustment and illuminance measure-ment.
6. STANDARD ACCESSORY OPERATION
Main light
Fill-in light
• Contrast measurementa. Mount Lumidisc @3 to light
sensor w. Install in the samemanner as Lumisphere. (SeeP. 8)
b. Hold meter at subject positionand point Lumidisc @3 directlytoward center of main light.
c. Press stopper button !3 andread meter scale footcandleindication e.
d. Turn the memo pointer dialand set the memo pointer !7
at the footcandle value theneedle points to.
e. In the same manner, measurethe fill-in light. In this case,take care that light from mainsource does not enter sensor.
f. Read a difference betweenthe footcandle value thememo pointer is set (seeabove d) and the one for fill-in light (= needle position).Ratio between main and fill-in light footcandles becomes the con-trast ratio.
Example:With main light at 640 footcandles, fill-in light reads 320 foot-candles. Illumination contrast ratio becomes;
640 2320 1
or 2 : 1=
12
6. STANDARD ACCESSORY OPERATION
• Illuminance (Lux) measurementa. Mount Limidisc @3 to light sensor w in the same manner as
Lumisphere.b. Place Lumidisc @3 parallel with the light source.c. Press stopper button !3 and read meter scale footcandle indica-
tion e.d. Multiply this value by 10.76 to obtain lux.Example:80 x 10.76 = 860.8 lux
If meter deflects beyond scale, insert High slide @2, thenmultiply footcandle indication by 32.
Example:80 x 32 = 2560 footcandles2560 x 10.76 = 27545.6 lux
Reflected Light Measurement1.Lumigrida. Mount Lumigrid to light
sensor w in the same man-ner as Lumisphere q. (SeeP.8)
b. Set sensitivity value of em-ployed film. Setting is per-formed in the same manneras for incident light measure-ment. (See P.8)
c. From camera position, pointLumigrid @4 directly towardpart of subject to be mea-sured.
d. In case of measuring narrowareas, as close as possible tothe subject, measure re-flected light from main pointof subject. Use adequate careat this time that meter shadowetc. does not interfere.
@4
13
6. STANDARD ACCESSORY OPERATION
e. Press stopper button !3, and read meter scale footcandle indica-tion e. However, since footcandles are units of incident light only,this value becomes simply a reference.
f. Transfer indicated value to dial scale u. Rotate the dial ring !6
and set mark o.g. At this time, shutter speed scale !4 and aperture scale !5 combi-
nation becomes the correct exposure.Note:Do not employ slides for reflected light measurement.
※ More accurate results can be obtained for reflected light mea-surement by using a Gray card (optional accessory).
▲H
14
6. STANDARD ACCESSORY OPERATION
Other Operations1.Exposure Value (EV number) Readout
5 10 20 40 80 160 320 6401.25k
-2-1
+1 +2 -2 -1+1
+27 ・・8 ・・ 9 EV
Studio DeluxeⅢ 1.25k
640
32016080
4020
1050 228 4 56 8
11
1611.4
10050
200
603015
84
21
2 60125 250500
1k1/S
EC
8k4k
2kISO
8 18 24 64128
CIN
E
12890
6445
3222 1
0.7F
L-398A
H
Reading this exposure value toperform setting becomes conve-nient for cameras which employa light value system of shutter andaperture combination.a. Read meter needle !8 foot-
candle indication e.b. Transfer this number to the
dial scale u. Rotate dial ring!6 and set ▲ scale mark i.If the High slide is inserted, setthe mark o.
c. EV value indicated by EVmark y becomes the correctexposure value.
28 15 30 60125 250
5001k
4k
4
2k
8 18 24 64128
CIN
E
2 16 11 8 5.6
2.84
21
0.71.4
2.Employing Cine ScaleIncident and reflected light mea-surements during cine photogra-phy are performed in the samemanner as described previously.However, since the cine scale !2
numerals correspond to cine cam-era film speed, read the aperturescale !5 indication that pertains tothe employed film speed.
▲H
15
6. STANDARD ACCESSORY OPERATION
3.Using Exposure Multipliers (-2, -1, +1, +2)Exposure multiplier indications are provided at both sides of the and ▲ marks of the dial scale. Use the -1 or -2 mark when desiring tocut the exposure to 1/2 of 1/4 and +1 or +2 mark to multiply the expo-sure by 2 or 4.Set the appropriate mark, instead of the or ▲ mark, to the dialscale value.
T =360×R
θ� R = Frames exposed in 1 secondT = Exposure time = Shutter angle θ
510
20 40 80 160 320 640 1.25k-2
-1
+1 +2 -2 -1+1
+20・・11・・1
2 EV
6 1/SEC
k
H
-2-1
+1
+2
-2
-1
+1+2
Note: Some cine cameras possess faster exposure times due to anarrower rotating shutter angle (angle of light transmitting portion). Itis important to know the accurate shutter angle value versus cinespeed for your camera in order to determine proper exposure. Referto the camera operating instructions, maker’s catalogue, etc. for shut-ter angle information.
Shutter angle and exposure calculation:
▲H
▲H
16
1.Direct Reading SlidesA total of 11 slides are available, all of which may be used togetherwith the Lumisphere and Lumidisc. (Note that they cannot be usedwith Limigrid.) The High slide, as mentioned previously, is employedfor varying the measuring range in 2 steps (high and low illumination),however, it can also be used for direct reading.
7. Optional Accessories Operation
Note: • HIGH slide can be used as a part of direct reading slide. • One set of slides consists of slide numbers 1 to 11 in a case.
HIGH slide is standard accessory and not included in the slideset, though there is a space to store it in the case of slide set.
1
2
3
4
5
6
7
8
9
10
11
HIGH
ISO64
50
40
32
25
20
16
ISO125
100
80
64
50
40
32
25
20
16
ISO160
125
100
80
64
50
40
32
25
20
12
ISO200
160
125
100
80
64
50
40
32
25
16
ISO250
200
160
125
100
80
64
50
40
32
20
12
400
320
250
200
160
125
100
80
64
40
25
400
320
250
200
160
125
80
50
400
320
250
160
100
Slide No.
Shutterspeed
1
15
1
30
1
40
1
50
1
60
1
125
1
250
1
500
17
2.Direct Reading Slide Application
7. Optional Accessories Operation
When photographing, select slidefrom the above table according tofilm sensitivity and shutter speed.Insert slide and perform measure-ment in the same manner as forincident light. Read directly the ap-erture value r indicated by themeter needle !8.
※ Since it is not necessary to ro-tate the dial when employingdirect reading slides, settingbecomes extremely fast andconvenient.
18
Since the Studio Deluxe Ⅲ is a high precision instrument, use amplecare in regard to the following points.
• Avoid dropping or subjecting it to strong shock. • Do not store in areas subject to magnetic fields or where insect
repellants are located (metal cabinets, clothing dressers, etc.). • Keep Lumisphere and Lumidisc clean and protect from dust and
scratches. • Wipe Lumisphere and Lumidisc with a dry soft cloth if it becomes
dirty. Never use organic cleaners (like Thinner or benzene).
8. HANDLING CAUTIONS
JG1297521
7-24-14, OIZUMI-GAKUEN-CHO, NERIMA-KU,
TOKYO 178-8686 JAPAN
TEL:+81(0)3-3978-2335 FAX:+81(0)3-3978-5229
http://www.sekonic.co.jp/English