Effective speedlight placement, Continued – Nikon SB-50DX User Manual
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• Illuminating a subject mainly from the side
By using the infrared remote commander (p. 53), a subject can be illuminated
mainly from the side with Speedlights placed away from the camera.
• Place the Speedlight(s) to achieve desired effect.
Speedlight Placement
Master flash unit
without SW-9IR
Slave
flash unit
Subject
SB-50DX with SW-9IR filter
Camera: F80D (Aperture-Priority Auto exposure
mode, Front-Curtain Sync flash mode)
Lens: AF Zoom-Nikkor 28-80mm f/3.3-5.6G
Master flash unit (SB-50DX with SW-9IR filter):
Wireless Flash mode (Automatic Balanced Fill-
Flash with TTL Multi-Sensor)
Slave flash unit (SB-50DX): Auto Slave Flash mode
• Emphasizing the outline of the subject
When taking a portrait, you can backlight the subject by placing a Speedlight
directly behind the subject to emphasize the outline of the subject.
Effective Speedlight Placement
—continued
• Set the slave flash unit to Manual flash mode
(Manual Slave Flash mode with the SB-50DX, p. 52)
for rather high output level.
• When using a camera in Group I, II or III (p. 28),
compensate flash output level (p. 35) to the + side.
Subject
Single flash (built-in
Speedlight)
Camera: F80D (Manual exposure mode, Front-Curtain
Sync flash mode)
Lens: AF Zoom-Nikkor 28-80mm f/3.3-5.6G
Master flash unit (built-in Speedlight): Standard TTL
Flash
Slave flash unit (SB-50DX): Manual Slave Flash mode
Using more than two Speedlights
The brightness of flash illumination is inversely
proportional to the square of the distance
between the flash unit and the subject. For
example, if the distance between Speedlight A
and the subject is 1m (3.3 ft.), and Speedlight B
is 2m (6.6 ft.), the combined brightness of the
two Speedlights will be:
A : B = 1
2
: 2
2
= 1 : 4 (in meters)
or 3.3
2
: 6.6
2
= 11 : 44 (in feet)]
Therefore, the illumination provided by
Speedlight A is four times (or two steps)
brighter than that provided by Speedlight B.
Speedlight A
Speedlight B
1m
(3.3 ft.)
2m
(6.6 ft.)
Subject
SB-50DX with SW-9IR filter
SB-50DX (E) 02.12.9 2:33 PM Page 60