Manual Minolta Flash Meter IV (page 38 of 44) (English)

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DETERMING LIGHTING

RATIOS

The memory

function of the

Flash

Meter

can

be used to determine the

lighting

ratio of

various

light

sources.

This is especially

useful

when determining

lamp-to-subject

distances

for

particular

modeling

effect.

When

using the optional

Minolta

Booster ll,

possible

check

the

distribution of

light across

camera's

groundglass

surface.

To use:

Attach

the optional

flat diffuser.

Set

the

measuring-mode selector

to the

required

setting:

"AMBl",

"CORD",

"NON.C".

Set

the

function

selector

"TlME"

position.

4. Set the

display-mode

selector to

"ExlN" position.

a FNU

FNo,

I | €x}il.

NORi,

While holding the meter

the subject

position,

point

the meter's receptor

the

light

source

to be

measured

and

press

the

measuring button to take a

reading.

Press

the

memory

button

memorize

the

reading.

7. Take

reading of the light source

you

want to

compare

following

the

same

procedure.

l--....-*'.'.'

The

two

pointers

correspond

to the two light

sources

that

were measured.

| 1.422.8

45.68 11152232456490.

Tffi

,: ,.,

ATBI

tfu r-

-1

'to

f-,

e,rr,r

-f ' L'

Check the

difference between

the

pointers.

When

the

f-number

scale

displayed,

the

pointers

indi-

cates exposure

with half-stop

accuracy. Using

the

contrast scale,

quarter-stop

accuracy

is indicated.

check lighting

ratios more

precisely,

press

the

on/recall

switch.

The

first

reading will be displayed

"ExlN"

stops

on the LCD

panel.

Then,

press

the on/recall button again

to display the

"ExlN"

value for

the second

reading.

Find

the

difference

between the

two

readings.

Refer to the table

below to determing

Approx.

lighting

ratio.

ffi

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

4.0

16:1

5.0

32:1

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Minolta Flash Meter IV Manual

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