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Determining proper flash operation distance range in dual-light
close-up flash operation with lens in use
Use the table below to determine applicable apertures at the desired reproduction ratio.
The proper apertures depend on ISO sensitivity, lens focal length, and desired
reproduction ratio.
The reproduction ratio is defined as the image-on-film size to the actual subject size. For
example, if a 5 cm-long subject is photographed, and its length on film is 1 cm, then the
reproduction ratio is 1:5.
ISO sensitivity
ISO
25
50
100
200
2.8
4
2.8
4
5.6
2.8
4
5.6
8
4
5.6
8
11
5.6
8
11
16
8
11
16
22
11
16
22
32
16
22
32
45
22
32
45
64
32
45
64
45
64
64
Effective f-number
• The above data are applicable when two SB-R200 units are attached to the Attachment
Ring SX-1 on both sides with flash output level ratio set to 1:1, and two flash units are fired.
• More natural-looking illumination may be possible by tilting the SB-R200 toward the
optical axis, depending on reproduction ratios and the lens in use. Adjust the SB-R200 to
illuminate the center of the picture angle using the Target light.
• When taking pictures at reproduction ratios other than those listed above, determine the
appropriate figures on the table above. For example, at a 1:2 reproduction ratio, refer to
applicable aperture at 1:1 or 1:3.
• When the Extreme Close-Up Positioning Adapter SW-11 is used with the SB-R200, the
flash light amount varies depending on reproduction ratios (increases when the shooting
distance is approx. 15cm (5.9 in.) or less). Making test shots is recommended.
• The data in the table above are effective f-numbers. They are not apertures on the lens.
60mm f/2.8D
400
800 1600
5.6
8
11
8
11
16
11
16
22
16
22
32
22
32
45
32
45
64
45
64
64
Reproduction ratio
AF Micro-Nikkor lenses
105mm f/2.8D
Applicable apertures
1 : 1
1 : 3
1 : 5
Lens focal length
200mm f/4D IF-ED
1 : 10
117
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