Specifications, Specifications -55, 30 (iso too – Nikon SB 20 User Manual
Page 82
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SPECIFICATIONS
All performance data are for normal-temperature operation
[20°C (68°F)]
Electronic
construction
Guide number
(at manuai fuii iight
output)
Zoom capability
Angie of coverage
Automatic silicon-controlled
rectifier and series circuitry
30 (ISO too
and meters) or
49
(ISO
25 and feet) with the
zoom set ring at N ■
Three settings: W for
wideangle, N for normal and
T for telephoto
Zoom set
ring position
Horizontal
Vertical
Usable lens
W (wideangle)
53°
70“
28 mm or longer
N (normal)
45°
60“
35 mm or longer
T (telephoto)
23“
31“
85mm or longer
Bounce capabiiity
Flash duration
Flash head can be rotated
down to -7° or up to 90“
Light output
(approx.)
Flash duration (approx.)
Full
1/1200sec.
1/2
1/1500 sec.
1/4
1/3700sec.
1/8
1/7400 sec.
1/16
1/15000 sec.