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

W AI.B Full-Auto

Depending on the camera used, AI.B (AI bounce flash) full-auto mode
compatibility and some of the operations to start AI.B full-auto shooting
vary (EOS cameras released up to the first half of 2014 do not
support AI.B full-auto shooting).
During AI.B full-auto shooting, the flash fires briefly (preflash) before the
image is shot to measure the distance to the subject and the distance to
the ceiling for bouncing the flash light. This operation automatically sets
an appropriate bounce angle for the subject.
You can perform this operation using one of the following two methods.
The operating procedure differs according to the camera used.
1. Use the Speedlite's <X> AI.B full-auto distance measurement
start button.
2. Use the camera's depth-of-field preview button.
AI.B Full-Auto Compatible Cameras and Operation Restrictions
EOS DIGITAL cameras released in and after the second half
of 2017
You can start distance measurement for AI.B full-auto shooting using
either operation 1 or 2 described above.
* While EOS REBEL T7/2000D/1500D and EOS REBEL T100/3000D/4000D,
were released in or after the second half of 2017, the cameras provide the
same compatibility as "EOS cameras released up to the first half of 2014" on
the next page. AI.B full-auto shooting cannot be performed.
For information on the latest cameras supporting the AI.B full-auto
function, refer to the Canon Web site.
When using an EOS DIGITAL camera released in or after the second
half of 2017 not equipped with the depth-of-field preview button, you can
assign the depth-of-field preview function to a button with the camera's
customization features and start distance measurement for AI.B full-auto
shooting (perform the same operation as 2) by pressing the button
(except for the certain buttons).
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