AAperture, Sensitivity, and Flash Range

Flash range varies with sensitivity (ISO equivalency) and aperture.

 

 

Aperture at ISO equivalent of

 

 

Approximate range

100

200

 

400

800

1600

 

3200

6400

m

ft

1.4

2

 

2.8

4

5.6

 

8

11

0.7–8.5

2 ft 4 in.–27 ft 11 in.

2

2.8

 

4

5.6

8

 

11

16

0.6–6.0

2 ft–19 ft 8 in.

2.8

4

 

5.6

8

11

 

16

22

0.6–4.2

2 ft–13 ft 9 in.

4

5.6

 

8

11

16

 

22

32

0.6–3.0

2 ft–9 ft 10 in.

5.6

8

 

11

16

22

 

32

—

0.6–2.1

2 ft–6 ft 11 in.

8

11

 

16

22

32

 

—

—

0.6–1.5

2 ft–4 ft 11 in.

11

16

 

22

32

—

 

—

—

0.6–1.1

2 ft–3 ft 7 in.

16

22

 

32

—

—

 

—

—

0.6–0.8

2 ft–2 ft 7 in.

The built-in flash has a minimum range of 0.6 m (2 ft).

In mode P, the maximum aperture (minimum f-number) is limited according to ISO sensitivity, as shown below:

Maximum aperture at ISO equivalent of:

100

200

400

800

1600

3200

6400

2.8

3.5

4

5

5.6

7.1

8

If the maximum aperture of the lens is smaller than given above, the maximum value for aperture will be the maximum aperture of the lens.

ASee Also

See page 125 for information on locking flash value (FV) for a metered subject before recomposing a photograph.

For information on auto FP high-speed sync and choosing a flash sync speed, see Custom

Setting e1 (Flash sync speed, 0 244). For information on choosing the slowest shutter l speed available when using the flash, see Custom Setting e2 (Flash shutter speed, 0 245).

For information on flash control and using the built-in flash in commander mode, see Custom Setting e3 (Flash cntrl for built-in flash, 0 246).

See page 303 for information on using optional flash units.

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