Light meters
Sekonic Auto Leader L-38 User manual
User manual for Sekonic Auto Leader L-38. 24 pages in English. Read the original PDF, download or print a copy without registration.
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- Sekonic
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- Sekonic Auto Leader L-38
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- User manual
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- 24
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- Light meters
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INSTRUCTIONS
FORTHEUSEOF
PHOTOETECTR IC EXPOSUREM E T E R
AUTO- I.EADER
r_38View original page 1Page 2 · Read text
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r0nEwoRD
Deor User,
Your S ekonic Auto-Leoder L-38 meter is without question one of the most
p r o c t i c o l , l e o s t c o m pilc o t e d , e o s i e r o n d o c c u r o t e m o d e t h u s f o r : l f y o u
observe these few infarmotive pointers, you must become expert in itS use
o f t e r t h e f i r s t u s i n g .
o S e t f i l m s p e e d - A S Ao r D I N
OSet pointers(Triongles)for, "Cover Closed'l "Cover Open'l qr "Cover Open
ond Booster Opert."
O Point meter towqrd obiect or sublect.
OPloce choser bor with oronge circle, over pointer, then choose your f / stop
ond shutter speed.
I Becouse of the expert croftsmonshlp ond the highest grodes of moteriols
used, you moy expect this meter t o give yc,u mony yeors of sotisfoction.
A l s o , d u e t o t h e h i g h r o t i n g A S A - 6 t o l 2 t h o u s o n d , t h i s m e t e r w i l l n o t
become outmoded due to higher emulsion speeds being steodily roised by
m o n u f o c t u r e r s . S E K O N I C
Tokyo, Jopon
2
--.-\-.\
.: ,-. ,i- __ -- ";|.'ri"'*" .View original page 2Page 3 · Read text
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WHAI IS A PHOTOE1ECTRIC:XPOSUREMITER?
B r i e f l y d e s c r i b e d , o p h o t o e l e c t r i c e x p o s u r e m e t e r i s o p r e c i s i o n
i n s t r u m e n t w l r i c h , b y m e o n s o f o p h o t o e l e c t r i c c e l l o r c e l l s , m e o s u r e s p r i m o r i l y
b r i g h t n e s s l e v e l . l t o l s o p r o v i d e s t h o t t h e m e o s u r e d b r i g h t n e s s b e t r o n s l o t e d
i n t o p h o t o g r o p h i c f o c t o r s f o r t h e d e t e r m i n o t i o n s o f t h e c o r r e c t e x p o s u r e s f
s e n s i t i z e d f i l m .
I t i s i m p o r t o n t t h o t t h e b e g r n n e r c p p r e c i o t e t h o t , o l t h o u g h t h i s i n s t r u m e n t i s
i n f i n i t e l y s u p e r i o r t o i h e h u m o n e y e i n e v o l u o t i n g t h e i n t e n s i t y o f l i g h t , i t h o s
n o m o g i c o l p o w e r s . T h e h u m o n e y e { o c u s e s , s h o r p l y o t o s m o l l o n g l e , i t i s
s e n s i t i v e t o l i g h t b u t o l s o p o s s e s s e s t h e p o r a l e r o f o c c o m o d o t i o n t o v o r i o u s
l e v e l s o f l i g h t i n g . l t i s w e l l k n o w n t n o t t h i s o c c o m o d o t i o n t o k g s s o m e r i m e ,o s
l o n g o s t w o h o u r s . O n t h e o t h e r h o n d , t h e p h o t o e l e c t r i c c e l l i s e x t r e m e l y
s e n s i t i v e t o t h e s l i g h t e s t v o r io n c e i n l i g h t i n t e n s i t y o n d r e c o r d s t h i s i n s t o n t l y .
H o w e v e r , t h e m e t e r p r o v i d e s o n l y o n o v e r o g e o f o l l t h e v o r i o u s l i g h t r o y s f r o m
t h e h i g h e s t t o t h e d o r k e s t p o r i s o f o n g u l o r f i e l d i t w o s d e s i g n e d t o c o v e r . l t
d o e s n o t " s e e " s p e c i f i c h i g h l i g h t s , s h o d o w s , c o l o r s , e t c
I n t h e h o n d s o f o t h o u g h t f u l p h o t o g r o p h e r , t h e S e k o n i c A u t o - L e o d e r L - 3 8
m e t e r i s i n d i s p e n s o b l e f o r d e t e r m i n i n g c o n s i s t e n t l y t h e c o r r e c t
e x p o s u r e u n d e o l l c o n d i t i o n s o f l i g h t i n g . R e o d t h e i n s t r u c t i o n s c o r e f u l l y .
M o k e e x p e r i m e n t o l e x p o s u r e f o c i o r s . I n t h i s w o y , y o u w i l l s o o n o c h i e v e
c o m p l e t e m o s t e r y o f t h e o l l - i m p o r t o n t p h o t o g r o p h i c p r o b l e m . c o r r e c t
e x p o s u r e . 3View original page 3Page 5 · Read text
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Study the diogrom on the opposite Some of the free electronsmove towords
p o g e . T h e r e o r e t w o p h o t o e l e c t r i c the bor.rier-loyer ond o greoter number
c e l l s , t h e m o i n c e l l o n d t h e o m p l i f i e r t o w o r d s t h e m e t o l b o s e . T h u s o
c e l l . T h e l o t t e r t s c o l l e d t h e 1 ' F l i p - U p p o t e n t i o l d i f f e r e n c e i s c o u s e d o n d
B o o s t e r . " l t i s n o t o p e r o t i v eu n t i l i t i s t h i s r e s u l t si n t h e f l o w o f o v e r y s m o l l
b r o u g h t t o t h e r i g h t - o n g l ep o s i t i o no s e l e c t r i c c u r r e n t . T h e s t r e n g t h o f t h e
s h o w n i n f i g . A . E o c h p h o t o e l e c t r i c e l e c t r i c c u r r e n t i s p r o p o r t i o n o lt o t h e
c e l l i s c o v e r e d w i t h o l e n t i c u l o r i n r e n s i r yo f r h e l i g h t f o l l i n g o n t h e
w i n d o w w h i c h p e r m i t s l i g h t c o m i n g c e l l . T h e c u r r e n ti s c o n d u c t e d t h r o u g hfrom o certoin ongulor field to be
o v e r y s e n s i t i v e m i c r o o m m e t etro{ c c u s s e d t h r o u g h o b o f f l e o n t h e
o h o t o e l e c t r i c c e l l b e l o w . T h e c e l l w h i c h l s o t t o c h e d o p o i n t e r . T h e
' s k n o w n o s o b o r r i e r -ol y e r t y p e o f p o i n t e r i s d e f l e c t e d i n p r o p o r t i o n t o
s e l e n i u mc e l l . A d i o g r o mo f i t s p o r t s t h e c u r r e n t . T h e r e of r e w h e r e t h i s
i s s h o w n i n f i g . B . W h e n t h i s t y p e o f d e f l e c t i o ni s m e o s u r e do g o i n s to s c o l e ,
c e l l i s e x p o s e d t o l i g h t i t b e c o m e s o w e h o v e o b t o i n e do n o v e r o g e v o l u e o f
self-generoting source of electricity. t h e i n t e n s i t y o f l i g h t o r b r i g h t n e s s .
T h e r e o s o n f o r t h i s o h e n o m e n o ni s W h e n t h e f l i p - u p b o o s t e r i s s w i t c h e dn o t f u l l v k n o w n . l t i s b e l ; e v e d t h o t
u n d e r t h e i m p o c t o f l i g h t p o r r i c l e s( o i n , t h e s e n s i t i v i t y i s i n c r e o s e d 4 0 0 %
f o r m o f e n e r g y ) e l e c i r o n sw i t h i n t h e o n d w e c o n o b t o i n o v o l u e i n v e r y
seleniumore freed. l o w l e v e l i l l u m i n o t i o n .
. " *View original page 5Page 9 · Read text
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THE BASICOPERATIOIIO] IHE TIETER
T he S ekonic A uto-Leoder L -38 i s e x p o s u r e , t h e S e k o n i c A u t o - L e o d e r
u s e d f o r m e t e r i n gr e $ l e c t e dl i g h t . T h i s L - 3 8 p r o v i d e s t h r e e i n d e x m o r k i n g so n
i s t h e l i g h t t h o t i s r e { l e c t e d f r o m inner diol plote.
oblects lowords your comero.The moin A l o n g s i d e o f t h e w o r d " C l o s e " ( i n
p h c i t o e l e c t r i c c e l l i s s u f f i c i e n t l y r e d ) i s o r e d t r i o n g l e . T h i s t r i o n g l e
sensitive to give considerobleresponse s hould be pointed ot t he red dot on
to bright lighting when the cover obove t h e c e n t e r d i s c w h e n t h e c o v e r i s
its window is closed. In this condition, c l o s e d o n d t h e b o o s t e r c e l r i s c l o s e d .
t h e c e l l r e c e i v e s o n l y t h e l i g h t t h o t T h e b l u e t r i o n g l ei s p l o c e d o v e r t h e
e n t e r s t h r o u g h l h e s l i t . T h e { l i p - u p r e d d o t w h e n t h e c g v e r i s o p e n .
b o o s t e r i s u s e d w h e n t h e i n t e n s i t y o f T h e b l o c k t r i o n g l ei s p l o c e d o v e r
r h e l i g h t i s s o l o w t h o t t h e r e i s l i t t l e t h e r e d d o t w h e n t h e c o v e r i s o p e n e d
or no deflection of the pointer when o n d t h e b o o s t e r c e l l i s o o e n e d o n d
f he cover over the window of the moin snopped in ploce.
c e l l i s o p e n . T h e m e t e r m e o s u r e sf o r T h e f i r s t t w o m o r k s r e f e r t o t h e
t h r e e d e g r e e s o f i l l u m i n o t i o nw h i c h w e c o n d i t i o no f t h e c o v e r o v e r t h e m o i n
term bright, dull, ond dim. c e l l w i n d o w . T h e c o v e r h o s o b l u e
l n o r d e r i o m o k e o p r e c i s e d e t e r - i n d e x b o r , w h e n i t i s o p e n , o n d o r e d
minotiono[ the foctors for the correct d o t w h e n i t i s c l o s e d .
.e ,rr . ,I:lrd.t. i- rView original page 9Page 10 · Read text
When metering, the simple rules to
ooserve ore ihese.
ar------- ( A) For bright outdoor ond indoor illu- \ / minotion. CLOSE the cover ond use
the RED index or triongle ploced over
the red dol on disc.
For dull conditions, OPEN the cover
ond use the BLUE triongl e.
(B) center some over tne red dot
.a'-"--' on otsc.View original page 10Page 11 · Read text
For dim conditions, (l) OPEN the
(c) cover,Boosterreleoseclicks inBooster,ploce, thenpulluseup blockuntil
a triongle. Center some over the red dot t disc.., a on you must be guided by the Noturolly
deflection of the pointer. Too much light
enterang the meter will deflect the
pointer beyond'the extreme right end.
When there is too rnuch light, snop
the boost.'; shut ond close lhe cover,
thus reducing light entronce. Unlike
orher exposure meters, the lock of
Guide Lines hos eliminoted ony confu-
sion in obtoining exoci reodings. T he
simpl icrty of iust lining up the choser
bor ond poinier gives on im mediote
ond occuroic rejoi,lg.View original page 11Page 12 · Read text
THI CATCUuTOR OR COTPUTER DIA1
T his consists of three diols. T he ttlt sPttD
monipulotion of the diols is very simple. T his moy be s et by t he colculotor
You will f ind it eosy to rotote them to diol, Frlm Speed Serting Diol for rhe
.ny setting, using your thumb. ASA or DIN volue. You obtoin either
of these volues from rhe film monufo-
clurer's leoflet occomponyi ng the film,
Turn the diol so thot the smoll block
nrork on the edge of the ASA or DIN
window is opposite the corresponding
spe,..d roting. Note.thot there ore smoll
divisions between the ASA or DIN
numbers for intermediote volues.
A{ter setting the relotive index (red,
blue or block) triongles over the red
dot on disc, the colculotor diol gives
you outomoticolly oll the exposure
foctors needed for still, movie comeros,
ond LVS or EVS shutfers. llView original page 12Page 13 · Read text
1U3 ATD EUS SCA1ES
This is shown by the numbers within s$.{:b I lhe window morked "E. V." ond "L. V." *rS
EVS is onother nome of LVS' il
This scole is used if your comero
is f itted with o speciol lens w hich Ii
incorporotes o shutter for the light a\?
volue or exposure volue system'
After setting the diol to the relotive
ASA or DIN volue, locote the oppro'
priote morker ond then reod the L.V.
(or E, V. ) number from the diol.
Now sef f his volue on the lens of
your comero.
t2View original page 13Page 14 · Read text
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COTI'ETTIOTAlIACTORS
T h e s e o r e t h e s h u t t e r s p e e d o n d h i g h s h u t t e r s p e e d . l f o n t h e o t h e r$ l / n v n b e r ( l e n s s t o p ) t h o t o p p l y t o o n h o n d , y o u r s u b i e c t h o s r o b e p h o t o g r o -
i n d e x s e t t i n g . T h e y o r e t h e s e r i e s , I p h e d t o s h o w c o n s i d e r o b l e d e p t h o f
t h r o u g h 2 2 ( l / n u n b e r s ) o n d l 0 O O t h r o u g h f i e l d , y o u s e l e c t t h e s u i t o b l e l e n s s t o p .
B . ( s h u t t e r s p e e d s ) . U n n u m b e r e d l i n e f o g i u " y o u o n e x o m p l e h o w t h i s
F n e lxnt t ht oe l 1o 0t t0e0r sr ee pr ir ee ss etnhtes b2l0o0c0l .f i g u r e s oc fo m1 b0 i0n,octei on ltrewr ot rhkes , r se ed t t rt hi oen gAlSe A( C lsopseeedd)
1 , 2 , 4 , 8 , w i t h i nw h i t e s q u o r e s r e p r e s e n t o v e r t h e r e d d o t o n d i s c , r o t o t e t h e
s e c o n d s ; t h e r e m o i n d e r , f r o c i i o n s o f d i o l c l o c k w i s e s o t h o t t h e c h o s e r b o r
s e c o n d s . Y o u u s e t h e s e c t i b n s o { s t o p s o t t h e r i g h t e n d .$ {
t h e s e t w o s e r i e s t h o t o r e i n i u x t o p o s i - N o t e t h o t f o r t h e h i g h e s t s h u t t e r
t i o n t o o s c e r t o i n t h e s h u t t e r s p e e d o n d s p e e d , | / 2 0 0 0 t h s e c . , r h e l e n s s t o p
l e n s s t o o c o m b i n o t i o n s . f s t / l .
I t i s { o r y o u t o d e t e r m i n e w h i c h A l l t h e c o m b i n o t i o n s d o w n t o | / 2 2
c o m b i n o t i o n i s b e s t f o r t h e s u b i e c t . l f w i l l p e r m i t t h e s o m e o m o u n t o i l i g h t t o
y o u w i s h t o s t o p o c t i o n , y o u s e l e c t o { o l l o n t h e { i l m .
r3View original page 14Page 15 · Read text
iTOUIT CATTRAS
Since the shutter speed of the movie
comero is o constonl volue, it becomes
merely necessory to select the correct
I f nurtbe: f or the number of f romes per
second (8 thru 64). The movie lens
serres is shown on red bond I thru 22.
Set the diol ro the ASA or DIN volue,
locot e, the oppropriote index ogoins t
the red dot on disc, stop rhe choser
bor obove the bpflected pornter, ond
then reod the f / number in the series
thot opposes the number o{.fromes per
second you intend to operote your
comero, Since the normol operoting
speed is l6 {romes per second, it is
indicored by o bold whire figure within
o red squore.'14View original page 15Page 17 · Read text
7
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CIOSE.UPNITERIIIG
T h i s i s o l w o y s t h e m o s t s o t i s f o c t o r y
method but not olwoys possible.Toking
y o u r m e t e r c l o s e u p t o t h e s u b i e c t
e n t o i l s s o m e c o r e . F o u r t o s i x i n c h e s
b i s t o n c ei s o b o u t r i g h t b u t b e c o r e fu l
n o t t o l e t t h e m e t e r c o s t i t s s h o d o w
o n t h e s u r f o c e s y o u o r e m e t e r i n g ,
M e o su r e t h e i n te n s i ty o f l i g h t f r o m
v o r i o u s p o r t s o f t h e s u b i e c t . Y o u w i l l
t h e n o p p r e c i oet t h e c o n s i d e r o b l ed i ff e .
r e n c e s b e t w e e n t h e r e fl e c t e d l i g h t f r o m
diff e rently colored oblects or s urfoces.
E x p c s e f o r t h e o v e r o g ev o l u eo f t h e
v o r i o u s r e o d i n g s y o u m o k e . R e f e r t o
the notes under "Color Phorogrophy."
t 6View original page 17Page 18 · Read text
www.orphancameras.com TNACCTSSIBlEOBIECIS A c o m p r o m i s e e x p o s u r e v o l u e c o n b e d e t e r m i n e d b y . r e o s u r i n g t h e l i g h t r e f l e c t e d f r o m t h e p o l m of your hond. S ee i hot t he polm of you r hond i s f o c i n g t h e d i r e c t i o n o f t h e l i g h t f o l l i n g o n t h e s u b i e c t b e f o r e m o k i n g o r e o d i n g . H u m o n s k i n h o s o r e f l e c t o n c e v o l u e o f 3 5 % o n d i s t h e r e f o r e r e l i o b l e f o r d e t e r m i n i n g t h e c o r r e c t e x p o s r J r e f o r f l e s h t o n e s . B l o c k o b i e c t s h o v e o r e f l e c t o n c e v o l u e o f 5 % o r l e s s , w h e r e o s w h i t e o b l e c t s m o y b e o s h i g h o s 9 0 % . F o r i m p o r t o n t e x p o s u r e s , t o k e t h r e e u s i n g o f u l l s t o p o b o v e o n d b e l o w s h o t s i n o b r o c k e t W i t h b l o c k . o n d - w h i t e t h o t f o r t h e f i r s t e x p o s u r e . f i l m s e x p o s e o t t h e f / s t o p y o u e s t i m o t e W i t h c o l o r f i l m t h e d i f f e r e n c e s h o u l d f i r s t o n d t h e n m o k e t w o m o r e e x p o s u r e s b e n o t m o r e t h o n o n e - h o l f s t o p . t 7View original page 18
Page 19 · Read text
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sllow sEA AIID WATER
H e r e y o u h o v e t o d e c o n c e r .n e d w i t h o v e r o g e v o l u e I h e g e n e r o l r u l e I s t o
t i r e e x t r e m e l y h i g h r e f l e c t o n c e v o l u e I n c r e o s e y o u r s h u t t e r s p e e d b V 5 0 t c
o f t h e s e s u b l e c ts A l m o s t I n v o r r o b l y , o I O O % o r c l o s e d o w n t h e l e n s b Y o n e
m e t e r r e o d i n g o f t h e m i d ' p o r t r o n o f t h e o r o n e o n o o n e ' h o l f s t o p s t o c o m p e n s o l e
s c e n e w , l l r e s u l t r n o v e r e x p o s u r e T o k e f o r e x t r e m e l y h i g h r e f l e c t o n c e T h e
t w o o r t n r e e r e o d i n g s f r o m d i { f e r e n t u s e o f f i l t e r s r s r e c o m m e n d e df o r t h e s e
o b l e c t s n e o r b y o n d e x P o s e f o r t h e s c e n e s
l 8View original page 19Page 20 · Read text
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COIORPHOTOGRAPHY
T h e p h o t o g r o p h e r h o s t o c o n s i d e r
s e v e r o l f o c t o r s , t h e q u o l i t y o f t h e
l i g h t , t h e t y p e o f f i l m b e i n g u s e d o n d
t h e c o r n p o s i t i o n Y o u m u s t b e g u i d e d
b y t h e f i l m m o n u fc c t u r c r ' s r e c o m m e n d o -
t i o n s t o c o m p e n s o t c f o r c h o n g e s i n
r h e q u o l i t y o f l i g h t r e l o t i v e t o t h e r y p e
o f f i l m u s e d A g o i n , t h e p r o c e s s i n g o f
c o l o r f i l m i n v o l v e s o r e v e r s o l ' m e t h o d
l v h i c h p r o d u c e s d i f f e r e n t r e s u l t s f r o m
t l r e m o k i n 3 o f o b l o c k - o n d " w h i t e p r i n r
I n e x p o s i n g f o r b l o c k - o n d - w h i t ep i c -
t u r e s , y o u s h o u l d t o k e c o r e i n m e t e r i n g
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CAREOT YOURSI KO]IIC zelo.
AUTO-]EADER I-38 I Do noi sublect rhe meter to ropid c h o n g e s o f t e m p e r o t u r eo r h u m i d i t y .
T h e S e k o n i c A U T O - L E A D E R L . 3 B N e v e r p l o c e t h e m e t e r o n o m o g n e -
i s o h i g h - c l o s sp r e c i s i o ni n s t r u m e n t t i z e d m o t e r i o lI.n c o s e t h i s c o n d i t i o n
T r e o ti t c o r e f u l l y o h d i t w i l l g i v e y o u l o s t s , i t i s q u i t e p o s s i b l et h o t t h e
y e o r s o f s e r v i c e . T h e v e r y s e n s i l i v e m e t e r b e c o m e s i n o p e r o t i v e .
. m i c r o o m m e t ei sr p r o t e c t e df r o m n o r m oI 2 . B e c o r e f u l n o t t o d r o p i t o r i o r i t
shock by speciol ruggedizotion. T he s u d d e n l y o s t h i s w i l l c o u s e o
p h o t o - e l e c t r i cc e l l s w i l l n o t , f o r r e o s o n d i s p l o c e m e n t o f t ' h e b e o r i n g s o f
o f t h e f r e e e l e c t r o n p n e n o m e n o nr u n t h e m i c r o o m m e t e r o r m o r e s e r i o u s
d o w n o r b e c o m e w e o k . T h e f o l l o w i n g d o m o g e .
points should be o'bserved 3 . W h e n n o t i n u s e , k e e p i t s t o r e d i n
ZEROADIUSTNEXT trei t s e c po lor r cey i n. g c o s e i n o c o o l , d u s t
C h e c k t h e m e t e r p e r i o d i c o l l tyo s e e CO]ISISTEilTOYEROR pointerthot the exoctly opposes the
z e r o m o r k w h e n o l l l t g h t i s e x c l u d e d UIIDEREXPOSURE
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t h e f l i p - u p b o o s t e r i s r e t r o c t e d w i t ' h i n m o k e t h e n e c e s s o r y c o m p e n s o t i o nb y
t h e b o d y o f t h e m e t e r . S h o u l d i t b e s e e t i n gt h e A S A o r D I N v o l u e s l i g h t l y ' o l t z e r o ' , t u r nw i t h o s m o l l s c r e w d r i v e r , o v e r o r b e l o w ( o s t h e c o s e m o y b e )
l e f t o r r i g h t , t h e s c r e w l o c o t e d o t , t h e t h e v o l v e g i v e n b y t h e f i l m . m o n u .
b o c k o f t h e m e t e r n e o r t h e c o t c h f o r f octurer. Do not be of roid to experiment.
t h e { l i p - u p b o o s t e r . A s m o l l t u r n i s T h i s i s t h e s t o m p o f o s e r i o u sp h o t o .
suf f icient to center the pointer correctly gropher.
23
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