Speedlite 550EX

Frequently Asked Questions

1. The flash range scale uses the foot unit. How can I use the meter unit?
2. Why is the flash range reduced when I raise the flash exposure compensation with my Speedlite EX?
3. Why does my Canon Speedlite not fire a pre-flash?
4. Why am I hearing a beep sound on my Speedlite EX flash while the red light is lit?
5. Where can I find the serial number of my Speedlite flash?
6. How do I set the custom functions on my Speedlite flash gun?
7. What does FP Flash stand for on the EX-series Speedlite flashes for my Single Lens Reflex (SLR) camera?