User Guide

DECISION MASTER SYSTEM
Conventional fill-flash Aperture
Shutter speed 1/100
In lighting conditions such as shown here, fill - flash 32
becomes a powerful technique to solve the prob- 22
lem . But to give a correct exposure for both subject 16
and background, using flash in addition to daylight 11
17
involves extremely complicated calculations . 8
Balanced fill-flash control
Low
contrast
--- NormaT -- -
Darker
N4004 balanced fill-flash
Thanks to Decision Master System, the N4004 has
made this procedure totally automatic. Both back-
ground and the main subject are correctly exposed,
due to the use of balanced fill-flash . And it's all
automatic!
Brighter
~- -+
em
' -- ~rf~~~:: ---- ;==:;;::::::::;;:::::::=;;==r== :;;:::::::
Low
contrast
-------- - ---
I • Normal
contrast
------------
High
Contrast
E xpos ure metering D HiQh-brightne ss • Average m ete ring
pattern s weighted metering
Flasth a
l
motutnt • lowest fla sh amount D l ower flash amount D low fla sh amount
con ro pa erns
Controlling the flash output Controlling the background exposure
Using the average brightness and contrast obtained Fill-flash exposure is the sum ~
from the triple sensor, the scene is classified into total of available light and the
two groups : bright-light weighted and averaged . light from the flash, unlike flash •
Then proper exposure value is calculated using the pictures in the dark where exist-
three exposure values measured by the triple sen- ing light is negligible. Thus good fill - flash pictures
sor. This adjusts the exposure, taking background depend on accurately determining how much flash
brightness information into consideration as much is required . The N4004 does this automatically.
as possible . Using contrast and average brightness as de-
tected by Decision Master System's triple sensor ,
the amount of flash is determined as one of three
different levels -low, lower, and lowest.
The TTL sensor monitors the amount of light as
it is exposed on the film surface, by monitoring the
reflected light from the film ; flash output is then
automatically cut the moment the predetermined
level is achieved.
5.6
4
2.8
V
21 2 3 4 5 6 7 8 9
10 1112 13 14 15 16 17 18 19
Programmed , Balanced
auto TIL flash ~ fill- flash
(With 50mm f/1.8 AF , ISO 100 , built-in flash)
Program line for exposure setting in flash
pictures
The chart shows the program lines for exposure
setting in N4004 flash photography in the program
auto exposure mode. Note that the shutter speed is
fixed at 11100 . From EVlO* (with ISO 100) to the
right or brighter, the balanced fill - flash program line
is selected. This means that the best aperture is
automatically chosen to provide optimum exposure
for the background .
When the scene is darker than EV10 *, normal
programmed TTL auto flash control is chosen . That
is, the aperture is automatically set to match the
ISO film speed . In this example with a 50mm f/1 .8
lens and using ISO 100 film and built-in flash , the
aperture is fixed at f/2.8 .
• An average of the three outputs from the triple sensor .
Compatible AF Nikkors with built-in flash
While all AF Nikkor lenses are compatible with the
N4004 for great flasli pictures , with either the built -
in flash or an optional flash, the built-in flash is not
recommended for some AF Nikkor lenses whose
size or coverage angle may cast shadows on the
scene . AF Nikkor lenses recommended for use w it h
the built-in flash are as follows :
AF Nikkor
50mm f/1.4;
50mm f/1.8;
180mm f/2 .8 ED-IF ;
300mm f/4 ED-IF ;
28-85mm f/3 . 5-4 . 5; (focal length 35mm or longer)
35-70mm f/3.3-4.5;
35-105mm f/3.5-4.5;
35-135mm f/3.5-4.5;
70-210mm f/4
Micro 55mm f/2 .8
•
Do not use a lens hood; it could cause slight
vignetting.
• AF 35-105mm f/3 . 5-4 .5 and AF 35-135mm
f/3.5-4.5 lenses cannot be used for macro
focusing. Other lenses cannot be used if the
focusing distance is shorter than the flash shoot -
ing range .
.Vignetting may occur when shooting a subject
located near the minimum focusing distance
(1.5m) with an AF 35-135mm f/3 . 5-4 .5 lens at
35mm focal length.