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Standard TTL Flash
A type of TTL auto flash that does not apply any automatic
flash output level compensation. Flash output is controlled
independently from the ambient light exposure measurement
and, in most cases, illuminates a subject somewhat more
strongly than with Automatic Balanced Fill-Flash, making the
subject stand out distinctly from the background.
TTL auto flash
The camera’s light sensor measures flash illumination, as
reflected by the subject on the film and shuts off the flash when
measurement indicates correct exposure. Because the sensor
that controls the flash receives light through the lens, TTL auto
flash can be used for bounce flash photography, fill-flash,
multiple flash photography, etc. An additional advantage of TTL
auto flash is that you can use a wide range of aperture settings,
while ensuring correct exposure.
With built-in flash or dedicated Nikon TTL Speedlight, the
F70/F70D camera performs Automatic Balanced Fill-Flash and
Standard TTL Flash.
Vari-Program
Provides variable Programs for specific picture-taking
situations. Eight Programs are available with the F70/F70
D
camera. (See pp. 61-67.)
Vignetting
Progressively diminished illumination on the film from the centre
to the corners. There are two kinds of vignetting—natural
vignetting caused by the lens, and vignetting that is caused by
improper use of accessories such as a lens hood or filter.
Hyperfocal distance
The closest point a photographer can focus on where the
depth of field includes infinity. When the lens is focused for
hyperfocal distance, the deepest depth of field, covering from
1/2 the hyperfocal distance to infinity, can be obtained at each
f/stop. The longer the focal length, the longer the hyperfocal
distance; the smaller the aperture (the larger the f/number), the
shorter the hyperfocal distance.
ISO film speed
The international standard for representing film sensitivity. The
higher the number, the greater the sensitivity, and vice versa. A
film speed of ISO 200 is twice as sensitive as ISO 100, and half
that of ISO 400 film.
Matrix metering system
An advanced camera light metering system using a multi-
segment sensor and computer.
When F70/F70
D
camera is used with D-type AF Nikkor lenses,
3D Matrix Metering will be performed.
Monitor Pre-flash(es)
When performing Automatic Balanced Fill-Flash with TTL Multi
Sensor, the F70/F70D’s built-in flash/dedicated Nikon
Speedlight fires a series of scarcely visible preflashes to enable
the camera’s computer to pre-analyze the scene. The TTL
Multi Sensor inside the camera body reads the amount of
reflected light, then the camera’s microcomputer determines
the area of the TTL sensor to be used for flash output control
and adjusts the flash output level. The Monitor Pre-flashes are
visible but not recognizable.
Rear-Curtain Sync
Flash fires an instant before the second (rear) curtain of the
focal plane shutter begins to move. When slow shutter speeds
are used, this feature can create a blur effect from the ambient
light, i.e., a flowing-light patterns following a moving subject
with subject movement frozen at the end of the light flow. (See
"Front-Curtain Sync".)
Single Servo AF
Once the subject is in focus, focus is locked. Useful for
recomposing the picture.
Slow Sync
A flash technique for using the flash at a slow shutter speed.
Flash shooting in dim light or at night at a fast shutter speed
often results in a flash-illuminated subject against a dark
background. Using a slower shutter speed with the flash brings
out the background details in the picture. Use of a slow shutter
speed with Rear-Curtain Sync is particularly effective for
illustrating the movement of a stream of light.
The F70/F70
D
’s Slow Sync mode extends the automatically
controlled shutter speed range (in Programmed Auto and
Aperture-Priority Auto) down to 30 sec.
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