72 Part II ✦Creating Great Photos with the Creative Lighting System
Table 3.2SB-800 Guide Numbers (at ISO 100)
Flash
Output
Level Zoom Head Position
1* 2** 14*** 17*** 24 28 35 50 70 85 105
M 1/1 12.5 M 16 M 17 M 19 M 30 M 32 M 38 M 44 M 50 M 53 M 56 M
41 Ft 52 Ft 56 Ft 62 Ft 96 Ft 105 Ft 125 Ft 144 Ft 165 Ft 174 Ft 184 Ft
M 1/2 8.8 M 11.3 M 12 M 13.4 M 21.2 M 22.6 M 26.9 M 31 M 35.4 M 37.5 M 40 M
29 Ft 37 Ft 39 Ft 44 Ft 70 Ft 74 Ft 88 Ft 102 Ft 116 Ft 126 Ft 131 Ft
M 1/4 6.3 M 8.0 M 8.5 M 9.5 M 15.0 M 16 M 19 M 22 M 25 M 26.5 M 28 M
21 Ft 26 Ft 28 Ft 31 Ft 49 Ft 52 Ft 62 Ft 72 Ft 82 Ft 87 Ft 92 Ft
M 1/8 4.4 M 5.7 M 6.0 M 6.7 M 10.6 M 11.3 M 13.4 M 15.6 M 17.7 M 18.7 M 19.8 M
14 Ft 19 Ft 20 Ft 22 Ft 35 Ft 37 Ft 44 Ft 51 Ft 58 Ft 61 Ft 65 Ft
M 1/16 3.1 M 4.0 M 4.3 M 4.8 M 7.5 M 8.0 M 9.5 M 11 M 12.5 M 13.3 M 14 M
10 Ft 13 Ft 14 Ft 16 Ft 25 Ft 26 Ft 31 Ft 36 Ft 41 Ft 44 Ft 46 Ft
M 1/32 2.2 M 2.8 M 3.0 M 3.4 M 5.3 M 6.0 M 6.7 M 7.8 M 8.8 M 9.4 M 9.9 M
7 Ft 9 Ft 10 Ft 11 Ft 17 Ft 20 Ft 22 Ft 26 Ft 29 Ft 31 Ft 32 Ft
M 1/64 1.6 M 2.0 M 2.1 M 2.4 M 3.7 M 4.0 M 4.8 M 5.5 M 6.3 M 6.6 M 7.0 M
5 Ft 7 Ft 7 Ft 8 Ft 12 Ft 13 Ft 16 Ft 18 Ft 21 Ft 22 Ft 23 Ft
M 1/128 1.1 M 1.4 M 1.5 M 1.7 M 2.6 M 2.8 M 3.4 M 3.9 M 4.4 M 4.7 M 4.9 M
4 Ft 5 Ft 5 Ft 6 Ft 8.5 Ft 9 Ft 11 Ft 13 Ft 14 Ft 15 Ft 16 Ft
* With Nikon diffusion dome and wide flash adapter
** With Nikon diffusion dome
*** With wide flash adapter
09_045275 ch03.qxp 11/28/06 8:24 PM Page 72