Nikon SB-910 - Manual (Page 129)

H–18
H
Tips on Speedlight Care and Reference Information
Guide number table
The SB-910 guide numbers differ depending on the camera’s image area,
illumination pattern, ISO sensitivity, zoom head position and fl ash output level.
ISO 100; m
Zoom head position
(mm)
FX format DX format
Standard
illumination
Even
illumination
Center-weighted
illumination
Standard
illumination
Even
illumination
Center-weighted
illumination
8 (BA+WP) – – – – – 13
8 (BA) – – – – – 16
8 (WP) – – – – – 17
10 (BA+WP) – – – 13 – –
10 (BA) – – – 16 – –
10 (WP) – – – 17 – –
11 (BA+WP) – – – – 13 –
11 (BA) – – – – 16 –
11 (WP) – – – – 17 –
12 (BA+WP) – – 13 – – –
12 (BA) – – 16 – – –
12 (WP) – – 17 – – –
12 – – – 23 – 26
14 (BA+WP) 13 – – – – –
14 (BA) 16 – – – – –
14 (WP) 17 – – – – –
14 – – – 25 – 29
16 – – – 27 22 32
17 (BA+WP) – 13 – – – –
17 (BA) – 16 – – – –
17 (WP) – 17 – – – –
17 22 – 25 29 23 33
18 23 – 26 30 24 34
20 24 – 27 31 25 36
24 27 22 32 34 32 39
28 30 24 36 36 33 42.5
35 34 31 39 40 37 46
50 40 36 45 45 43 49.5
70 44 41 49 49 47 52
85 46 44 51.5 50.5 49 54.5
105 49 47 52 51.5 50 −
120 50.5 48 53.5 52 51 −
135 51 49 54.5 53 51.5 −
180 52 51 − 53.5 52 −
200 53 51.5 − 54 52.5 −
BA: With the Nikon Diffusion Dome attached
WP: With the built-in wide panel in place