Canon EOS 30D - Manual (Page 103)

103
Using the Built-in Flash
Built-in Flash Range
With EF-S18-55mm f/3.5-5.6 ll [m / ft]
ISO speed Wide angle: 18mm Telephoto: 55mm
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
H: 3200 Approx. 1 - 21.0 / 3.3 - 68.9 Approx. 1 - 13.1 / 3.3 - 43.0
With EF-S17-85mm f/4-5.6 IS USM [m / ft]
ISO speed Wide angle: 17mm Telephoto: 85mm
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
H: 3200 Approx. 1 - 18.4 / 3.3 - 60.4 Approx. 1 - 13.1 / 3.3 - 43.0
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.
When using the built-in flash, detach any hood attached to the lens. A
lens hood will partially obstruct the flash.
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.
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.
To retract the flash, push it back down.
In the modes, even if you set the shutter speed to one faster
than 1/250 sec., it will be set automatically to 1/250 sec.
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.78)