AAperture, Sensitivity, and Flash Range

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

 

 

Aperture at ISO equivalent of

 

 

 

Range

100

200

 

400

800

1600

 

3200

6400

m

 

ft

1.4

2

 

2.8

4

5.6

 

8

11

0.7–8.5

 

2ft 4in.–27ft 11in.

2

2.8

 

4

5.6

8

 

11

16

0.6–6.0

 

2ft–19ft 8in.

 

 

 

 

 

 

 

 

 

 

 

 

2.8

4

 

5.6

8

11

 

16

22

0.6–4.2

 

2ft–13ft 9in.

4

5.6

 

8

11

16

 

22

32

0.6–3.0

 

2ft–9ft 10in.

 

 

 

 

 

 

 

 

 

 

 

 

5.6

8

 

11

16

22

 

32

—

0.6–2.1

 

2ft–6ft 11in.

 

 

 

 

 

 

 

 

 

 

 

 

8

11

 

16

22

32

 

—

—

0.6–1.5

 

2ft–4ft 11in.

11

16

 

22

32

—

 

—

—

0.6–1.1

 

2ft–3ft 7in.

 

 

 

 

 

 

 

 

 

 

 

 

16

22

 

32

—

—

 

—

—

0.6–0.8

 

2ft–2ft 7in.

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 149 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, 0 234). For information on choosing the slowest shutter speed available when using the flash, see Custom Setting e2 (Flash shutter speed, 0 235). For information on flash control and using the built-in flash in commander mode, see Custom Setting e3 (Flash cntrl for built-in flash, 0 236).

See page 292 for information on using optional flash units.

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147