Not if you are in one room and the camera and flash are in another. Perhaps you have to photograph something that it is not particularly safe to be near when the thing does what it has to do. That is not an uncommon situation in some industrial photo applications.Originally Posted by Dave Dawson
Another very common example does not involve walls but it does involve very large spaces. Like firing strobes in the ceiling of an arena during a sporting event while you are at the ring or court side with the camera. And you do not want other shooters to set your flash off when they use an on camera flash. That is a common use of radio slaves.
And radio waves travel at the speed of light (or thereabouts).
My understanding was that they travel the same speed in a vacuum. But few of us are using slave and radio slaves in a vacuum in everyday photography.
I love you guys .... this thread with a little work could be a Monty Python sketch.
But to the last posts - for any practical purpose air can be considered vacuum for Radio wave lengths.
You are of course right - the reaction time of the slave is faster than the time the flash lasts (around 1/1000 s). So the bottom line is - I can save my money for radio triggering for now - and even more importantly - not to get another gadget that needs to be stored and eventually gets broken or runs out of batteries in the worst moment.
thank you all for you patience.
Matus
Slaves work great . You have greater placement capability thaen you would with cables.
The only problem you may have is setting the flash so it is seen by the slave.
They make them so you can rotate them and the main still trigers them.
White Lightnings are good as additions to existing setups since they all have built in slaves. Lots of good used ones on ebay.
John Youngblood
www.jyoungblood.com
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