Canon eos 350d digital rebel xt User Manual

97

Using the Built-in Flash

With EF-S18-55mm f/3.5-5.6 ll

[m / ft]

100

Approx. 1 - 3.7 / 3.3 - 12.1

Approx. 1 - 2.3 / 3.3 - 7.5

200

Approx. 1 - 5.3 / 3.3 - 17.4

Approx. 1 - 3.3 / 3.3 - 10.8

400

Approx. 1 - 7.4 / 3.3 - 24.3

Approx. 1 - 4.6 / 3.3 - 15.1

800

Approx. 1 - 10.5 / 3.3 - 34.4

Approx. 1 - 6.6 / 3.3 - 21.7

1600

Approx. 1 - 14.9 / 3.3 - 48.9

Approx. 1 - 9.3 / 3.3 - 30.5

With EF-S17-85mm f/4-5.6 IS USM 

[m / ft]

100

Approx. 1 - 3.3 / 3.3 - 10.8

Approx. 1 - 2.3 / 3.3 - 7.5

200

Approx. 1 - 4.6 / 3.3 - 15.1

Approx. 1 - 3.3 / 3.3 - 10.8

400

Approx. 1 - 6.5 / 3.3 - 21.3

Approx. 1 - 4.6 / 3.3 - 15.1

800

Approx. 1 - 9.2 / 3.3 - 30.2

Approx. 1 - 6.6 / 3.3 - 21.7

1600

Approx. 1 - 13.0 / 3.3 - 42.7

Approx. 1 - 9.3 / 3.3 - 30.5

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Use the built-in flash at least 1 m/3.3 ft away from the subject. Closer 
distances will cause the lens barrel to partially obstruct the flash.

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When using the built-in flash, detach any hood attahed to the lens. A lens 
hood will partially obstruct the flash.

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A super telephoto lens or fast, large-aperture lens may partially obstruct 
the built-in flash coverage. In such a case, using an EX-series Speedlite 
(optional) is recommended.

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The built-in flash’s coverage is effective with lens focal lengths as short 
as 17mm. If the lens is shorter than 17mm, the periphery of the flash 
photo will look dark.

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To retract the flash, push it back down.

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In the <

s> <a> modes, even if you set the shutter speed to one faster 

than 1/200 sec., it will be set automatically to 1/200 sec.

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If autofocus cannot be achieved, the AF-assist beam (small flashes fired 
by the built-in flash) will be fired automatically (except in the <

3> <5>

<

7> modes). (p.74)