Nikon SB-102 os 사용 설명서 - 페이지 25

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Manual Flash Control

Manual flash operation allows you to control the light

output of the SB-102 by

setting

the shooting mode

selector

to one of three positions

"MFULL," "M1/4,"

"M1/16."

To determine which setting to

use,

begin by aligning the

correct

shooting situation

mark with the correct speed

on the ASAIISO film speed scale. Next, Ipcate the

flash-to-subject distance on the distance scale and

the

corresponding distance line up as it crosses

the aperture

scale.

At each intersection between the

distance line and an f/stop line on the aperture

scale

one of four

conditions

will be present: 1) the distance

line will intersect the extreme right-hand edge of the

f/stop line (the

"MFULL"

mark),

2) the distance line will

intersect a semicircle

(the "M1/4"

mark),

the dis-

tance

line

will intersect a triangle

(the "M1/16"

mark),

Example 1:

When

shooting

a subject underwater at 1 m (3.3 ft) with-

out using the wide-flash adapter while using ASAIISO

100 film, you can select one of three aperture/mode

settings:

f/16 at

"MFULL,"

flS at

"M1/4,"

or f/4 at

"M1/16."

If the shooting distance changes to 5 m (16.4 ft) but you

still

want to use

"MFULL,"

you should use an inter-

mediate aperture setting between f/2.S and f/4.

To determine the correct f/stop without using the expo-

sure

calculation dial, divide the GN (trom the chart on

page 26) by the flash-to-subject distance (in meters).

or 4) the distance line will intersect an unmarked portion

of the f/stop line. The first three conditions indicate the

manual flash mode that can be used at those particular

f/stops.

Before shooting, set the shooting mode selector to

correct position and set the correct aperture on the lens.

Example 2:

When shooting a subject underwater at 4 m (13.1 ft)

without using the wide-flash adapter while using

ASAIISO 100 film and

"MFULL,"

divide the GN (16) by

the shooting distance [4m (13ft)] to get the correct

aperture

(t!4)