Nikon SB 20 Instruction Manual page 23

Autofocus speedlight
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Usable apertures/shooting distance range in TTL mode
Unit: mitt)
ISO film speed
1000'
800'
400
200
100
2.8+ '/3
2.8
2
-
-
4+'13
4
2.8
2
-
5.6
+
'/3
5.6
4
2.8
2
8+'/3
8
5.6
4
2.8
Q.
11+ '13
11
8
5.6
4
0
~
16+'13
16
11
8
5.6
22+'13
22
16
11
8
-
-
22
16
11
-
-
-
22
16
-
-
-
-
22
• For Ntkon F·5011N2020 and F-3011N2000 only.
c:=:::J
=
Programmed TTL auto flash information.
Shooting distance range
50
25
With zoom
set
With zoom
set
With zoom
set
at
W
at
N
at
T
2.8-20
3.8-20
4.5-20
-
-
(92-66)
(12-66)
(15-66)
2.0-15
2.7-20
3.2-20
-
-
(6.6-49)
(8.9-66)
(10-66)
1.4-1
1
1.9-15
2.3-
18
-
-
(4
6-36)
(62-49)
(75
-
59)
2
1.0-7.8
1.3-10
1.6- 12
-
(33 - 25)
(4.3-33)
(52
-
39)
2.8
2
0.7 -5.5
1.0-7.5
1.2
-
9.0
(23- 18)
(3.3-25)
(39-30)
4
2.8
0.6-3.9
0.7 .-53
0.8-6.3
(20-13)
(2.3-17)
(26-21)
5.6
4
0.6-2.7
0.6-3.7
0.6-4.5
(2.0-89)
(2.0-
12)
(20-15)
8
5.6
0.6-1 .9
0.6-2.6
0.6-3.2
(2.0-6.2)
(20-85)
(2.0-10)
11
8
0.6-1.4
0.6-1 .9
0.6-2.2
(20-46)
(20-62)
(20-
7.2)
16
11
0.6-1.0
0.6-1.3
0.6- 1.5
(2.0-3.3)
(2.0-43)
(2.0
-
5.0)
21

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