Nikon SB-910 - 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 –––272232
17 (BA+WP) –13––––
17 (BA) –16––––
17 (WP) –17––––
17 22 – 25292333
18 23 – 26302434
20 24 – 27312536
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