W Ai.b Full-Auto Shooting - Canon Speedlite 470EX-AI Instruction Manual

W AI.B Full-Auto Shooting

Before performing AI.B (AI bounce flash) full-auto shooting, check if the
camera used supports full-auto bounce flash photography (p.46).
For an overview of AI.B full-auto shooting, see page 43. Additionally,
before performing AI.B full-auto shooting, review the "Safety
Precautions" (p.8), "General Cautions for AI.B Full-Auto Shooting and
AI.B Semi-Auto Shooting" (p.60), and the like.
Guidelines for Shooting Conditions in AI.B Full-Auto Mode
When performing AI.B full-auto shooting, perform bounce flash
photography using the figure below as reference. Additionally, with the
subject positioned in the center of the screen, press the <X> button
(to start distance measurement operation).
Under conditions such as when the subject is far away, the ceiling is far
away, the ceiling is a dark color, the ceiling is stepped or uneven, the
camera's ISO speed setting is low, or a large aperture value is set,
underexposure (insufficient exposure) is prone to occur.
When the distance to the ceiling is approx. 7 m / 23 ft. or greater
(estimate), or when the shooting angle exceeds approx. 60° upward or
approx. 60° downward, the flash head automatically moves to the
forward-facing position and normal flash shooting is performed without a
bounce flash.
48
Shooting distance
Approx. 1 - 5 m / 3.3 - 16.4 ft.
Distance to ceiling
Approx. 1 - 3 m /
3.3 - 9.8 ft.