Minolta Flash meter IV User Manual

o
When
the
f-number
scale
is displayed,
the
pointers
show the dif-
ference
in
illumina-
o
To
check
the
lighting
ratio
to
1/1O-stop
ac-
curacy, hold
down
the
on/reca
ll
switch. The
f
irst read
ing
wil I
be
displayed
on the
data
panel.
When
you
re-
f
ease
the
on
lrecall
but-
1
1.4 2 2.8
4 5.6 8 11
16
2232 4566 90
.
*
fi ii
,:.
,,
o'"'
""
../n
ExrN
-l.Li
tion
with
half-stop
accuracy.
EU
L''
i.5
ton,
the second reading is displayed
again. Sub-
tract the smaller
"Ex
I N
"
number
f rom
the larger
"Exf
N" number
to
determine
the difference in
stops
between to the twq
read
i
ngs. R ef
e
r
to
the
table
to
f
ind
the approximate
lighting ratio.
Stops
difference Approx. lighting ratio
0.6
1.5:1
1.0 2:1
1.6
3:1
2.O
4:1
2.6 6:1
3.0
8:1
4.O 16:1
5.0
32:1
40
GUIDE
NUMBER
CALCULATIONS
The
Flash
Meter IV
can
be
used
to determine
the
guide
number
for flash bulbs
or
electronic flash.
1.
Attach the optionaf
flat
diffuser.
2.
Set
switches
on
left
side
of meter
to:
Analog-displayswitch..
."FNo."
Digital-display switch.
"ExlN"
Normallanalyze
switch..
.."NORM"
Single/mu
lti
switch
"S
lN
G LE
"
3.
Set
measuring mode
to
"CORD"
or
"NON.C"
mode.
o
"CO
R
D" mode
must
be used
to
make
gu
ide
number
calculations
for flash bulbs.
Either
mode
can be
used
f or electronic
f
lash.
4. Set
function
switch
to
"lSO",
then
set
f
ilm
speed
to
ISO
100.
5.
Set
function
switch to
"TlME".
6,
Set the meter's
shutter speed within
your
camera's x-sync
range.
7
.
Position
the
f lash
meter
at
a
f ixed
d istance,
such
as
1
meter
(3.3
feet)
from
the
flash
unit
and aim the
diffuser directfy
at the
flash
unit.
8.
Take
a
f lash reading
in
the
usual
way.
9.
Use the displayed
"Ex
I
N
"
number
in
the
f
ormu
la
below to determine
the
guide
number.
ExlN
G.N. =
1.14
x
d
x
2
2
Where
d = Flash-to-merer
distance
Example
With a
display
reading of
"ExlN
10.0"
at
ISO 100
and a
f lash-to-meter
d
istance
of
1
meter,
work
the
equation
as
follows:
G.N.
= 1.14
x
--
1.14
x
= 1.14 x
=
36.5
in
10
*Z'
x2s
x32
meters
at
ISO 100
(aPProx.)
www.orphancameras.com

Minolta Flash meter IV Specifications

General

Light Receptor	Silicon photo cell
ISO Range	ISO 3 to 8000
Shutter Speed Range	30 min to 1/8000 sec
Display	LCD
Type	Handheld Flash Meter
Measuring Modes	Ambient, Flash
Measuring Range (Ambient)	EV -2 to EV 19.9 (ISO 100)
Measuring Range (Flash)	f/1.0 to f/90.9