Nikon SB 20 User Manual
Page 46
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Unit: m(ft.)
Light output Zoom
setting
iSO film speed
1600
800
400
200
100
50
25
Full
W
88
(289)
62
(203)
44
(144)
31
(102)
22
(72)
15
(49)
11
(36)
N
120
(394)
85
(279)
60
(197)
42
(138)
30
(98)
21
(69)
15
(49)
T
144
(472)
102
(335)
72
(236)
51
(167)
36
(118)
25
(82)
18
(59)
1/2
w
62
(203)
44
(144)
31
(102)
22
(72)
15
(49)
11
(36)
7.8
(25)
N
85
(279)
60
(197)
42
(138)
30
(98)
21
(69)
15
(49)
11
(36)
T
102
(335)
72
(236)
51
(167)
36
(118)
25
(82)
18
(59)
13
(43)
1/4
w
44
(144)
31
(102)
22
(72)
15
(49)
11
(36)
7.8
(25)
5.5
(18)
N
60
(197)
42
(138)
30
(98)
21
(69)
15
(49)
11
(36)
7.5
(25)
T
72
(236)
51
(167)
36
(118)
25
(82)
18
(59)
13
(43)
9
(30)
1/8
w
31
(102)
22
(72)
15
(49)
11
(36)
7.8
(25)
5.5
(18)
3.9
(13)
N
42
(138)
30
(98)
21
(69)
15
(49)
11
(36)
7.5
(25)
5.3
(17)
T
51
(167)
36
(118)
25
(82)
18
(59)
13
(43)
9
(30)
6.3
(21)
1/16
w
22
(72)
15
(49)
11
(36)
7.8
(25)
5.5
(18)
3.9
(13)
2.7
(8.8)
N
30
(98)
21
(69)
15
(49)
11
(36)
7.5
(25)
5.3
(17)
3.7
(12)
T
36
(118)
25
(82)
18
(59)
13
(43)
9
(30)
6.3
(21)
4.5
(15)