Originally Posted by mtclimber
Please keep in mind that the light power of the Slave Flash is also finite. It will go out to about 15 to 17 feet in Flash Range in a pinch, and then you have to accept that a higher ISO setting will be selected as you are at the maximum capability of the Slave Flash.
Some Slave Flashes (certain Vivitar and Digital Concepts models have "learning capability) however, I believe that the Zeikos Slave Flash fire on the first flash.
Thanks for your reply. Guess experimentation for the different distances for my particular flash unit is in order.