If you light timed events with strobes, sooner or later somebody will ask whether your flash is setting off the clock. It is a fair question, and the people asking usually care deeply about a fair run. Having a calm, clear answer helps you keep a good relationship with secretaries, timers and producers.
How an electric eye works
Most arena timing systems use a beam that runs from a transmitter to a receiver or reflector on the other side of the start line. The clock starts or stops when something physically breaks that beam. In other words, the system is looking for the beam to disappear, not for a burst of extra light to appear. A strobe pop adds light for a tiny fraction of a second; it does not block anything.
Timing equipment is also built to work outdoors in bright sun, under arena lights and with camera flashes going off in the stands. A system that could be triggered by a quick flash would be useless at almost every rodeo, so manufacturers design around exactly that problem.
Where problems really come from
When a time is questioned, the cause is usually something in the beam path rather than the light itself. That is where photographers need to be careful:
- Never place a light stand, sandbag or cable where it could sit in front of the eye or the reflector.
- Keep stands well away from the start line so a bumped stand cannot drift into the beam.
- Tape down every cable with gaffer tape so it cannot be kicked or dragged across the line.
- Do not lean over the timer setup to get an angle, even for a moment.
Talk to the people in charge
Before the event, introduce yourself to the timer and the arena director. Show them where your lights will be mounted and ask if they would like anything moved. Most will appreciate the courtesy, and if a question comes up later, they already know your setup is safe. Many events also run a backup stopwatch, which gives everybody extra confidence.
Bottom line
Strobes and electric eyes can share an arena without trouble. Mount your lights securely, keep everything out of the beam path, communicate early, and you can focus on what you came for: sharp, well lit pictures that riders are proud to buy.
