92
E-TTL II autoflash obtains high-precision and consistent flash shots.
If necessary,
the built-in flash will pop-up automatically
in low-light
or backlit conditions (except in <
3
> <
5
> <
7
> modes).
Regardless of the light level,
you can press the <
D
> button to pop-up
and fire the built-in flash whenever desired.
d
:
For fully automatic flash photography.
The shutter speed (1/
60 sec. - 1/250 sec.) and aperture value are set automatically,
just as in <
1
> (Full Auto) mode.
s
:
For when you want to set the shutter speed (30 sec. - 1/250
sec.).
The camera then
automatically sets the flash aperture
value
to provide the proper exposure for your shutter speed.
f
:
For when you want to set the aperture value.
The camera
then
automatically sets the shutter speed (30 sec. - 1/250
sec.)
to provide the proper exposure for your aperture. Against
dark backgrounds such as the night sky, slow-sync shooting will
be set so that both the subject and background are exposed
correctly. The main subject is exposed with the flash, and the
background is exposured with a slow shutter speed.
¡
Because automatic slow-sync shooting uses a slow shutter
speed, always use a tripod.
¡
If you do not want a slow shutter speed to be set, set C.Fn-03
[
Flash sync speed in Av mode
] to [
1: 1/250sec. (fixed)
].
(p.141)
a
:
You can set both the shutter speed (bulb or 30 sec. - 1/250
sec.) and aperture value.
The main subject is exposed
properly by the flash. The background exposure varies
depending on the shutter speed and aperture.
8
: The flash result will be the same as the <
d
> mode.
Using the Built-in Flash
Using the Built-in Flash in the Basic Zone
Using the Built-in Flash in the Creative Zone
93
Using the Built-in Flash
Built-in Flash Range
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 - 6.5 / 3.3 - 21.3
1600
Approx. 1 - 13.0 / 3.3 - 42.7
Approx. 1 - 9.2 / 3.3 - 30.2
H: 3200
Approx. 1 - 18.4 / 3.3 - 60.4
Approx. 1 - 13.0 / 3.3 - 42.7
With EF-S18-55mm f/3.5-5.6
[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 - 9.2 / 3.3 - 30.2
H: 3200
Approx. 1 - 21.0 / 3.3 - 68.9
Approx. 1 - 13.1 / 3.3 - 43.0
¡
Use the built-in flash at least 1m/3.3 ft away from the subject. Closer
distances will cause the lens to partially obstruct the flash.
¡
When using the built-in flash, detach any hood attahed to the lens. A lens
hood will partially obstruct the flash.
¡
When a super telephoto lens or fast, large-aperture lens is attached, the
built-in flash coverage might be obstructed. 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 <
s
> <
a
> 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 will be emitted
automatically (except in <
3
> <
5
> <
7
> modes). (p.68)
Содержание EOS 20D Digital
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