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430 iii speedlite infra red beam didn't fire in low light situations

secondlevel
Enthusiast
I was shooting a birthday event and the infrared beam didn't fire. I had to use my cell phone to create enough light to focus! I found the settings to change online but I am confused. I had another event and the infrared fired. I didn't change anything since my last job!

The article that I read stated that the new 430 model by default is set to prevent the infrared from firing and it will only activate when using the center focus point. I know I need to read the manual. I didn't think it would be that big of a difference upgrading from the 430 ii.

What is going on?
1 ACCEPTED SOLUTION

TTMartin
Authority

The IR focus assist will only work in One Shot AF mode. If you are using AIServo it wont.

View solution in original post

3 REPLIES 3

jrhoffman75
Legend

http://photo.stackexchange.com/questions/71916/why-isnt-infrared-af-assist-beam-the-default-when-ava...

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

TTMartin
Authority

The IR focus assist will only work in One Shot AF mode. If you are using AIServo it wont.

I want to say thanks for the reply. I can't recall if I changed it to continous focus; however, it explains why it might not have fired. 

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