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Flash shooting distance range
The distance range over
wh
ich a flash can effecti
vel
y provide light. Flash shooting
distance range
is
controlled by the amount of flash output available. Each
automatic Speed light's flash output varies from ma
xi
mum durati
on
to minimum
durati
on
. Close-up subjects will require lower (to minimum) output, while more
distant subjects will require more light up to the maximum output.
The flash shooting distance range varies with the aperture, film speed, etc.
Flash synchronization
Timing of the flash so it coincides with release of the camera's shutter. There are
two types of synchronization: Front-Curtain Sync, which fires the flash at the start
of the exposure, and Rear-Curtain Sync, which fires the flash at the end of the
exposure.
Flash sync speed
Shutter speed at which the entire film frame is exposed when the flash
is
fired
in
flash shooting. The N65/N65QD's flash sync speed
is
1/90 sec. or slower.
Flexible Program
Flexible Program function temporarily shifts
an
automatically selected shutter
speed/aperture combination while maintaining correct exposure. That
is
, the
desi
red
shutter speed or aperture can be selected
in
Auto-Multi Progr
am
.
f-number
The f-number represents the aperture value and
is
calculated from lens' focal
length divided by the effective aperture opening. The standard numbers for
calibration are 1, 1.4, 2, 2.8, 4, 5.6, 8,
11
, 16,
22
,
32
, etc.
The smallest f-number
is
called maximum aperture and the largest f-number
is
called minimum aperture. Lenses with large maximum apertures (smaller f-
number
s)
are 'fast' lenses that allow photographers to use faster shutter speeds
in
dim light. Lenses with smaller maximum apertures (larger f-numbers) allow the use !
of lower shutter speeds for available light but are also lighter and smaller than I
faster lenses.
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