Nikon SB-102 instruction manual Non-TTL Automatic Flash Control, Example

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 ASAIISO 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 ASAIISO 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 fi lm, the useable f/stops indicated on the non-TTL auto shooting aperture scale are fl4 and f/S. Using the aper- ture scale, distance lines, and distance scale, the flash-to-subject coupling distance ranges are deter- mined to be from 0.6 m (2 ft) to 4 m (13.1 ft) for f/4 and from 0.6m (2ft) to 2m (6.6ft) for f/S. 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 fl4 and f/S. If larger depth of field is desired, use f/S ; 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 (tt)
Shooting	I SU·101's Selector I		.		.
Situation Mark	Dial Setting	Coupling Distance
•W	O (pink circle)	0.6 to 8 (2 to 26)
	D(green square)	0.6 to 4		(2 to 13)
	O (pink circle)	0.6 to 5.6			(2 to 18)
•	D (green square)	0.6	to 2.8		(2 to 8.9)
	O (pink circle)	0.6	to 4	(2 to 13)
ell	D(green square)	0.6	to 2	(2 to 6.6)
W	O (pink circle)	0.6	to 2.8 (2 to 8.9)
ell	D green square)	0.6 to 1.4			(2 to 4.3)

•When the shooting situation mark index is aligned with an intermediate setting on the ASAIISO film speed scale (for example, ASAI ISO 64), the non·TTL auto shooting aperture index indicates two useable inter· mediate apertures on the non· TTL auto shooting aperture scale. In this situation, set one of the two intermediate apertures on the lens.

•In non-TTL automatic operation, the minimum flash-to-subject coupling distance is always a.6m (2ft). The maximum flash -to-subject coupling distance is determined by your choice of shooting situation marks regardless of the ASAIISO speed of the film in use. The coupling ranges that correspond to the four shooting situation marks are shown in the chart.

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