Nikon F3 High-Eyepoint - Evrangeofthecamera

EVRANGEOFTHECAMERA------------------
-=- he camera's meter may be used only within the shutter
sp eed range covered by the exposure value (EV) range
of t he meter, which varies with the aperture and ASA /
SO
settings.
The chart on page 35 shows the relationships between the
Usto p, shutler speed and film speed, indicating the
slowest functioning shutler speed (for metering purposes)
wit h any film speed / aperture combination.
Careful attention to the following instructions will assure
pr ecise exposure, automatically, over the comp lete expo-
su re control and meter range capabilities of your Nikon
F3 High-Eyepoint camera.
• Auto exposure control at full aperture
Fo r example, with an fl l.4 lens and ASAIISO 100 film,
the
automatic shutter will function down to one seco nd
with the lens set at fll.4, and proportionately slower as
the aperture is closed. However, practically speaking,
e ven if the shutler speed / aperture combination is outside
t he guaranteed EV range shown in Section C of the EV
C hart, you can still obtain good exposures at either the
AUTO or MANUAL setting unless "+ 2000" or "-8-"
appears in the viewfinder.
U sing a standard of ASAIISO 25 film, you may be as-
s ured of at least a four-second speed regardless of the
a perture of the lens used as long as the lens is set at full
a
perture (refer to Table).
U sing ASAIISO 400 at fll.4 , the slowest speed is 114
s econd ; however , as the aperture is closed down , the
fu nctioning shutler speed becomes progressively slower
until we
reach fl8 when the slowest speed of eight seconds
is functioning.
• Auto exposure control with stop-down
metering
_ When using a bellows or other extension equipment
which disengages the meter coupling device, it is neces-
sary to revert to stop-down metering . Certain limitations
are imposed in this mode.
As lens-to-film distance is increased , the metering range
( EV range) changes proportionately. For example, when
an fl2 lens is used at 2: I reproduction (twice life-size) the
effective flnumber is fl5 .6. When used at fl8, the effective
flnumber is fl22.
When pictures are taken under minimal light levels, it is
desirable to use a high-speed film (ASA/ ISO 160 or
higher). Using Tri-X at film speed 400 with stop-down
metering, with an effective flnumber of fl8, the shu tler
speed range would be from 114 second to 112000. Should
the light level drop below EV 6, it would be out of the
shutler speed range of the meter.
ASA/ ISO
speed
6400
3200 (4000)
1 600
800
400
200 (160)
100 ( 80 )
50 ( 64 )
25
12
Slowest shutter speed
{sec.}
1160
1130
1115
1/8
114
112
I
2
4
8
Table
Slowest shutter speed
at full aperture with
any lens
33