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.