PocketWizard has just released a major firmware upgrade for its Plus III and Plus IV triggers (more to come) that you absolutely want to check out. It’s called “E Release,” and it more than doubles the working range and the number of channels that your PocketWizard radio trigger is capable of. E Release is a refreshing, if odd, announcement from a trigger manufacturer; firmware updates for radio triggers aren’t typically newsworthy if they are released at all. E Release bucks…