Nikon autofocus speedlight SB-900 User Manual page 134

Specifications Specifications
Guide number table
The SB-900 guide numbers differ depending on the camera's image area, illumination
pattern, ISO sensitivity, zoom position and flash output level.
Zoom position (mm)
8 (BA+WP)
8 (BA)
8 (WP)
10 (BA+WP)
10 (BA)
10 (WP)
11 (BA+WP)
11 (BA)
11 (WP)
12 (BA+WP)
12 (BA)
12 (WP)
12
14 (BA+WP)
14 (BA)
14 (WP)
F
14
16
17 (BA+WP)
17 (BA)
17 (WP)
17
18
20
24
28
35
50
70
85
105
120
135
180
200
• BA: With the Nikon Diffusion Dome attached
• WP: With the wide-flash adapter in place
F–18
FX-format
Standard Center-weighted
illumination illumination
– –
– –
– –
– –
– –
– –
– –
– –
– –
– 13
– 16
– 17
– –
13 –
16 –
17 –
– –
– –
– –
– –
– –
22 25
23 26
24 27
27 32
30 36
34 40
40 46
44 50.5
47 52
49.5 53
51 56
51.5 58
54 –
56 –
Standard
Even illumination
illumination
– –
– –
– –
– 13
– 16
– 17
– –
– –
– –
– –
– –
– –
– 23
– –
– –
– –
– 25
– 27
13 –
16 –
17 –
– 29
– 30
– 31
22 34
24 36
31 40
36 46
41 49.5
44 51
49 52.5
50 54
50.5 56
51.5 56.5
52 57
ISO 100 · m
DX-format
Center-weighted
Even illumination
illumination
13 –
16 –
17 –
– –
– –
– –
– 13
– 16
– 17
– –
– –
– –
26 –
– –
– –
– –
29 –
32 22
– –
– –
– –
33 23
34 24
36 25
40 32
43 33
47 37
51 43
53 49
58 50.5
– 51
– 51.5
– 52.5
– 53
– 54