Nikon SB 20 User Manual
Page 29
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Usable apertures/shooting distance range in TTL mode
Unit: m (ft)
ISO film speed
Shooting distance range
1000*
800*
400
200
100
50
25
With zoom set
at W
With zoom set
at N
With zoom set
alT
2.8 + ‘/3
2.8
2
—
—
—
—
2.8-20
(9.2-66)
3.8-20
(12-66)
4.5-20
(15-66)
4 + 1/3
4
2.8
2
—
—
—
2.0-15
(6.6-49)
2.7-20
(8.9-66)
3.2-20
(10-66)
5.6+ 1/3
5.6
4
2.8
2
—
—
1.4-11
(4.6-36)
1.9-15
(6.2-49)
2.3-18
(7.5-59)
8 + 1/3
8
5.6
4
2.8
2
—
1.0-7.8
(3.3-25)
1.3-10
(4.3-33)
1.6-12
(5.2-39)
Q.
O
11 +1/3
11
8
5.6
4
2.8
2
0.7-5.5
(2.3-18)
1.0-7.5
(3.3-25)
1.2-9.0
(3.9-30)
16 +
1/3
16
11
8
5.6
4
2.8
0.6-3.9
(2.0-13)
0.7-5.3
(2.3-17)
0.8-6.3
(2.6-21)
22 + 1/3
22
16
11
8
5.6
4
0.6-2.7
(2.0-8.9)
0.6-3.7
(2.0-12)
0.6-4.5
(2.0-15)
—
—
22
16
11
8
5.6
0.6-1.9
(2.0-6.2)
0.6-2.6
(2.0-8.5)
0.6-3.2
(2.0-10)
—
—
—
22
16
11
8
0.6-1.4
(2.0-4.6)
0.6-1.9
(2.0-6.2)
0.6-2.2
(2.0-7.2)
—
—
—
—
22
16
11
0.6-1.0
(2.0-3.3)
0.6-1.3
(2.0-4.3)
0.6-1.5
(2.0-5.0)
'For Nikon F-501/N2020 and F-301/N2000 only.
I I =
Programmed TTL auto flash information.
21