The Difference Between Optical and Radio Wireless
I want to make sure, early on, that you understand the difference between “optical” wireless for your flash and “radio” wireless, because this is really important stuff. In short, an optical controller works like the remote for your TV. You know how when you point the remote at your TV, if it sees the infrared beam from your remote, it changes the channel or raises/lowers the volume? But, if there’s anything blocking that beam—anything in the way of that “line of sight” from the remote to the TV—it doesn’t work? So, you keep moving your TV remote around, aiming it at different angles, until you ...
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