Bedienungsanleitung Nikon SB-25 (Seite 70 von 73) (Englisch)

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Chapter

About Batteries

New batteries

Purchase the newest (freshest) batteries possible.

Temperature

Battery life ratings are based on operation at 20˚C (68˚F).

Especially at a lower temperature, battery life is shortened.

Keep spare batteries and if possible, use NiCd batteries.

Continuous use

Batteries are drained more quickly by continuous use than

by intermittent use.

Storage

Store batteries in a cool, dry place, below 20˚C (68˚F).

Battery brand

Do not mix battery brands or models, or new and old batter-

ies.

Disposal

Do not dispose of batteries by burning, and never disas-

semble batteries.

NiCd batteries

Compared with regular batteries, NiCd batteries offer a

faster recycling time and greater efficiency at low tempera-

tures.

Before charging NiCd batteries, thoroughly read the

instructions for the batteries and battery charger.

Batteries with a “+” terminal that exceeds 6mm (0.23”) in

diameter cannot be used.

DC Units SD-8/SD-7

Nikon DC Unit SD-8 or SD-7 can be used as an optional

external power source to enhance flash capacity and pro-

vide faster recycling time.

To use the DC Unit, connect its power cord SC-16 to the

SB-25’s external power terminal. Even when powered with

the DC Unit, the SB-25 still requires batteries inside the

flash unit. Do not remove the batteries.

In continuous shooting with the DC Unit, to prevent flash

head deterioration caused by heat, do not exceed the maxi-

mum number of flash listed below.

It is recommended to rest for more than 10 minutes after

firing near the maximum numbers.

SB-25 Flash

mode

TTL Auto Flash

SD-8

Maximum number of flash

SD-7

Non-TTL Auto

Flash

15 15

Manual Flash

15 (at full or

1/2 power)

40 (at 1/4 power or

less)

15 (at full or

1/2 power)

40 (at 1/4 power or

less)

Repeating Flash

15 15

Maximum consecutive firing

Specifications

All performance data are for normal-temperature operation

(20° C/68° F).

Electronic construction:

Automatic Insulated Gate Bipolar Transistor (IGBT) and

series circuitry.

Zoom capability:

Seven settings — 20mm (with the built-in wide flash

adapter), 24mm, 28mm, 35mm, 50mm, 70mm, 85mm;

auto power zoom with the Nikon F90-Series/N90, F4-

Series, F-801/N8008 and F-801s/N8008s; manually set

with other cameras.

Bounce capability:

Flash head tilts down to –7° or up to 90° with click

stops; flash head rotates through an arc of 270°, 90°

clockwise and 180° counterclockwise with click stops;

at front and vertical positions, flash head can be locked

Power source:

Four 1.5 AA-type penlight alkaline-manganese, or 1.2V

NiCd batteries; optional Battery Pack SD-8 and SD-7

are available as an external power source.

Power switch:

Three positions are provided — OFF, STBY (standby)

and ON; at STBY position with Nikon F90-Series/N90,

F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006,

F-601

M/N6000, F-401x/N5005, F-501/N2020, F-301/

N2000, F-401/N4004, F-401s/N4004s, FA, FE2, FG,

Nikonos V, FM2 or FG-20, SB-25 turns off automatically

when flash unit is not used for approx. 80 seconds, and

turns on when camera is turned on.

Flash duration (approx.):

1/1000 sec. @ 1/1 (full) output

1/1100 sec. @ 1/2 output

1/2500 sec. @ 1/4 output

1/5000 sec. @ 1/8 output

1/87000 sec. @ 1/16 output

1/12000 sec. @ 1/32 output

1/23000 sec. @ 1/64 output

Guide number (at ISO 100: for m/ft.):

Angle of coverage:

Light

output

1/1 (full)

20mm 24mm 28mm 35mm 50mm 70mm 85mm

20/66 30/98 32/105

1/2

14/46 21/69 23/75

1/4

10/33 15/49 16/52

1/8

7/23 10/33 11/36

1/16

5/16 7.5/25 8/26

1/32

3.5/11 5.3/17 5.7/19

1/64

2.5/8.2 3.8/17 4/13

36/118

26/85

18/59

13/43

9/30

6.4/21

4.5/15

42/138

30/98

21/69

15/49

10/33

7.5/25

5.3/17

48/157

34/112

24/79

17/56

12/39

8.5/28

6/20

50/164

36/118

25/82

18/59

13/43

9/30

6.3/21

Zoom-head position

Zoom-head position Horizontal coverage Vertical coverage

20mm 102° 90°

24mm 78° 60°

28mm 70° 53°

35mm 60° 45°

50mm 46° 34°

70mm 36° 26°

85mm 31° 23°

SB-25_En 03.1.14 8:18 PM Page 138

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