Nikon os Speedlight SB-102 - Manual (Page 24)

CONTROLS IN DETAIL —continued.
Non-TTL Automatic Flash Control
When using the optional Sensor Unit SU-101, you can
select one of two useable apertures.
The useable apertures vary according to the ASA/ISO
speed of the film in use, but they can be easily deter­
mined with the exposure calculation dial.
When the correct shooting situation mark is aligned
with the correct speed on the ASA/ISO film speed scale,
the non-TTL auto shooting aperture index ® above the
shooting situation mark indicates the useable apertures
(color-coded green and pink) on the non-TTL auto
shooting aperture scale.
To obtain the correct exposure, choose one of the two
useable f/stops and set the index on the sensor unit’s
selector dial to either the pink circle or the green square
to correspond to the color of the aperture selected.
Before doing this remember to take the flash-to-subject
distance into consideration.
Example:
When shooting underwater«<while using ASA/ISO 100
film, the useable f/stops indicated on the non-TTL auto
shooting aperture scale are f/4 and f/8. Using the aper­
ture scale, distance lines, and distance scale, the
flash-to-subject coupling distance ranges are deter­
mined to be from 0.6m (2ft) to 4m (13.1ft) for f/4 and
from 0.6m (2ft) to 2m (6.6ft) for f/8. Therefore, when
the subject is beyond 2m (6,6ft), you must select f/4.
When the subject is within 2m (6.6ft), you can choose
either f/4 and f/8. If larger depth of field is desired, use
f/8; if shorter recycling time is preferable, select f/4.
Remember to set the sensor unit’s selector dial to the
same color-coded position as the aperture on the
exposure calculation dial you have selected.
Non-TTL Auto Shooting Range
Unit: m (ft)
• W hen the shooting situation mark index is aligned with an intermediate
setting on the ASA/ISO film speed scale (for example, ASA/ISO 64).
the non-TTL auto shooting aperture index indicates two useable inter­
mediate apertures on the non-TTL auto shooting aperture scate. In this
situation, set one of the two intermediate apertures on the lens.
• In non- TTL automatic operation, the minimum fiash-to-subject coupling
distance is always 0.6m (2ft). The maxim um flash-to-subject coupling
distance is determined by your choice of shooting situation marks
regardless of the ASA/ISO speed of the film in use. The coupling ranges
that correspond to the four shooting situation marks are shown in the
chart.
Shooting
Situation Mark SU-101’s Selector
Dial Setting
Coupling Distance
0(pink circle) 0.6 to 8 (2 to 26)
□ (green square) 0.6 to 4 (2 to 13)
w
0(pink circle) 0.6 to 5.6 (2 to 18)
□ (green square) 0.6 to 2.8 (2 to 8.9)
0(pink circle) 0.6 to 4 (2 to 13)
□ (green square) 0.6 to 2 (2 to 6.6)
w
0(pink circle) 0.6 to 2.8 (2 to 8.9)
□ green square) 0.6 to 1.4 (2 to 4.3)
24