Light meters
Sekonic L-428 User manual
User manual for Sekonic L-428. 25 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Sekonic
- Model / document
- Sekonic L-428
- Document type
- User manual
- Language
- English
- Pages
- 25
- File size
- 2.5 MB
- Category
- Light meters
- Document date
- Not specified in catalog
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Page 4 · Read text
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1 . H igh Accu racY Special Accessories (Sold Separate-
* S i l i c o n l i g h t s e n s i n g d i o d e i s e m - l v )
p l o y e d a s t h e l i g h t s e n s o r e l e m e n t . ' V i e w f i n d e r ( 1 0 " l i g h t r e c e i v i n g
Response is fast under botn low a n g l e a t t a c h m e n t )
a n d h i g h i l l u m i n a t t o n . ' E n l a r g e r A t t a c h m e n t ( f o r e n l a r g e r
* Stability and accuracy are advanced exposure measurements )
t o a n e w l e v e l . ' P i n p o i n t A t t a c h m e n t ( f o r m e a s u r -
i n g l i g h t d i s t r i b u t i o n o n v i e w
2. Easy to EmPloY camera focal plane)
* Switcnable H and L range scales are ' Microscope Attachment (for ex-
evenly graduated for easy reading at posure measurements in Photo-
a n y p o s l t l o n . microscopy )
* W i d e m e a s u r i n g r a n g e f r o m E V - 3 ' Special Dials for Each Attach-
1 e + 1 B . ment
* F r e e l y r o t a t i n g l i g h t s e n s o r s e c t i o n . . M o v i e D i a l ( e x p o s u r e a n d c o m -
R o t a t i o n a n g l e R i g h t : 2 O O " p u t i n g d i a l f o r m o v i e p h o t o -
Lef t: 1 00" g r a p h y )
* Meter pointer can be stopped at the
deflected position (meter stop
m e c h a n i s m ) .
* S w i t c n l o c k m e c h a n i s m c a n b e e m -
p l o y e d i n e i t h e r O N ( l i g h t m e a s u r e -
m e n t ) o r O F F ( p o i n t e r s t o p &
storage) Positions.
3. Reliability
* I n t e r n a l c i r c u i t r y u t i l l z e s h i g h r e l i a -
b i l i t y e l e c t r o n i c c o m P o n e n t s a n d
p r i n t e d c i r c u i t m o d u l e . S t a b l e p e r -
f o r m a n c e i s m a i n t a i n e d o v e r l o n g
term usage.
4. Full Selection of Accessories
* A complete range of accessories is
a v a i l a b l e t o m a k e t h i s a s y s t e m
m e t e r w i t n f l e x i b i l i t Y t o m e e t i n -
t e n d e d a p p l i c a t i o n s .
* Standard Accessorles
L u m i s p h e r e , L u m i d i s c , R e f l e c -
t e d L i g h t F i l t e rView original page 4Page 5 · Read text
Viewfinder (w/special dial )
Enlarger Attachment (w/special dial )
Pinpoint Attachment (w/special diall
Movie Dial
Microscope Attachment (w/special dial)
www.orphancameras.comView original page 5Page 6 · Read text
SPECIFICATIONS
lVleasuringSystem Incident & ref lected light
(interchangeabledials & attachmentsavailable
according to application)
H & L 2-step switchable linear scale
M e a s u r i n g R a n g e I n c i d e n t l i g h t ( w / L u m i s p h e r e ) :
L R a n g e= E V - 3 - + 8 ( A S A 1 0 0 )
H R a n s e= E V + B - 1 B ( A S A 1 0 O )
Reflectedlight (w/reflectedlight f ilter):
L R a n g e= E y + 1 - 1 2 ( A S A 1 O 0 )
H R a n g e= E V 1 2 - 2 2 ( A S A 1 0 0 )
Accuracy Witnin x%EV
Light SensorSection lncident light: Lumisphere& Lumidisc
Ref lected light: reflectedlight f ilter (40' light receiving s
a n g l e ) , V i e w f i n d e r( 1 O ol i g h t r e c e i v i n g
angle) and variousattachments
Element: silicon photodiode,sensitivity
compensationby til1s1
Scales ASA = 0.8 - 25,000
D I N = 0 - 4 5
f / s t o p = 1 - 9 0
Exposure time = 1/4000 sec - 60 min
E V - . - 7 - + 2 4View original page 6Page 7 · Read text
Power Source 4 mercury batteriesJIS +G13 (1.5V)
ElectronicCircuitry All-transistorized
C a l i b r a t i o n F a c t o r C = 3 4 0 K = 1 2 . 5
Dimensions 136 x 65 x 47mm
Weight Approx. 280g (incl. batteries)
Others Battery checker mechanism
Pointer lock mechanism
Switch button lock mechanism
Standard Accessories Lumisphere, Lumidisc, ref lected light f ilter, strap
SpecialAccessories Viewfinder, Enlarger Attachment. Pinpoint Attachment,
Microscope Attachment, various specialdials, and Movie
D i a l
www.orphancameras.comView original page 7Page 8 · Read text
NAMES OF PARTS O Lumisphere @ S*iueling light sensorsection @ Lock lever @ Switch button @ Battery check mark @ Pointer \U Light scale @ Scale plate @ Zero mark @ H-L Selectorknob () EV scale @ Incident light indicator mark @ Dial light scale @ Film sensitivityknob @ Reflected light indicator mark @ ASA scale @ DIN scale @ Dial mounting screw @ f /nu mber scale @ Shutter scale @ Strap bracket @ LumidiscView original page 8
Page 9 · Read text
@ Battety check button
Battery cover @
Battery cover lock screw @
@ nettected light filter
www.orphancameras.comView original page 9Page 11 · Read text
2. INSERTINGBATTERIES
F o u r J I S # G 1 3 ( 1 . 5 V ) m e r c u r y c e l l s
are employed for power. (Equivalent
are Mallory MS-76H, Eveready5-76E,
Ray-O-VacRS76G)
* Use a coin etc. to turn the battery
cover lock screw @ toward the O
(Open) direction.
When lock screw disengages,gently
raise the battery cover @ to open
rt.
After observingbattery polarities (+
& -) and the polarity markingsof
the battery compartment, insert
two batteries into each receptacle.
Both batteries in each receptacle
should be faced the same way.
Replace the battery cover @ ,
press lightly with fingertips and
turn the lock screw toward C
(Close)to secure.
NOTE
* Use caution when inserting bat-
teries not to reverse (+ & -) polari-
ttes.
To prevent inadvertent switch clos-
ing f ro m d r a i n i n g b a t t e r y p o we r
w h e n no t i n u s e . m a k e i t a h a b it to
loc k t h e s w i t c h b u t t o n @ in th e
O F F p o s i t i o n .
When no t u s i n g t h e m e t e r fo r a n
extended period (more than a
mont h), r e m o v e b a t t e r i e s a n d sto re
in a d ry p l a c e .
www.orphancameras.comView original page 11Page 15 · Read text
3. SELECTINGH OR
L RANGE
H ( h i g h ) a n d L ( l o w ) i l l u m i n a t i o n
measurements can be perf ormed by
s imp ly s l i d i n g t h e H - L s e le cto r kn o b
@ T h e k n o b i s c o u p l e d with th e
lig h t s c a l e @, w h i c h a l s o ch a n g e s to
display the appropriate range.
N O T E
* P erf o r m i n i t i a l m e a s u r e me n t a t th e
H range.
* lf t h e p o i n t e r d e f l e c t s co mp le te ly
toward the left, switcn to the L
range and perform measurement.
4. MEASUREMENT& EXPO.
SURE READING
a ) From the location of the subject
d e s ire d t o b e m e a s u r e d , p o in t th e
Lumisphere toward the camera.
(Tne light sensor section can be
freely rotated.)
b ) Hold the exposure meter properly
and depress the switch button @ .
The pointer will deflect according
to the brightness. When the switch
b u t t o n i s r e l e a s e d , t h e p o in te r will
hold at the deflected position.
1 3
www.orphancameras.comView original page 15Page 19 · Read text
a) Read light scale value indicated by
the pointer.
b) Transfer the value to the dial light
scale @. turn the dial ring and set
value to the incident light indicator
mark @ (During reflected light
measurement, set to reflected light
indicator mark @ t.
c) The value indicated on the EV scale
@ by the arrow becomes the
proper exposure value.
1 7
www.orphancameras.comView original page 19Page 21 · Read text
4. MEASUREMENT & EXPO-
SUREREADING
a) Point the reflected light filter
towards the desired location of the
subject to be measured. (Lignt
sensorsection rotates freelY.)
b) Measure as close to the subject as
possible and take readings from
important subject areas. Use ade-
quate care at this time not to
induce the exposure meter shadow K etc. into the area to be measured.
c) Depress the switch button @ and
read the value indicated by the
poi nter.
d) Transfer the value to the dial light
scale @. Turn the dial ring and
align the value with the reflected
light indicator mark 6 @
e) Tne f/stop scale (t and shutter
scale @ combination at this time
is for proper exposure.
NOTE
* Use caution not to misinterpret the
incident light indicator mark f, @
for the reflected light indicator
mark 6 @
* A standard reflectance hand-screen
(sold separately) can be emploYed
during reflected light measurement
to provide the correct value.
1 9
www.orphancameras.comView original page 21Page 25 · Read text
HANDLING CAUTIONS
Since the System Meter L-428 is a ln event of malfr.rnction,bring or send
p rec is ion i n s t r u m e n t , c a u t io n is re co m- the Meter to the nearest SEKON lC
mended c o n c e r n i n g t h e fo llo win g sales of f ice or Authorized Service
poi nts. Station.
lf necessary to shiP the Meter to a
a ) A v oid d r o p p i n g o r a p p lyin g stro n g Service Station, be sure to wraP in
s h o c k t o t h e M e t e r . shock-absorbing material at least 3cm
( 1 - 1 1 4i n ) t h i c k , t h e n p a c k i n a s t r o n gb ) D o n o t s t o r e i n l o c a t i o n s with h ig h
t e mpe r a t u r e o r h u m i d i t Y. corrugated box.
c ) A v oid s t o r i n g i n l o ca tio n s with
magn e t i c f i e l d s o r w h e re in se cti-
cides have been used (metal cabi-
n e t s , d r e s s e r s ,e t c . )
d ) A v oid s c r a t c h i n g t h e L u misp h e re
a n d L u m i d i s c , a n d a lwa ys ke e P
t h e m c l e a n . ( W n e n s o i l e d , th e Y ca n
b e w a s h e d t h o r o u g h l Y in a lu ke -
w a rm s o a p a n d w a t e r s o lu tio n .)
23
www.orphancameras.comView original page 25Related documents and language editions
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PDF verified 2026-10-10.