One of the knocks against the new PocketWizard MiniTT1 and FlexTT5 system is its relatively short working range with certain remote Canon Speedlites, ones that emit RF noise in the same frequency band used by LPA Design's wireless units. The most prominent of the affected flashes is Canon's current flagship, the 580EX II, plus its predecessor, the 580EX. That's the bad news. The good news is the working range can be increased dramatically by swaddling the remote flash in an inexpensive RF shielding fabric called VeilShield. In our tests, the maximum working distance is doubled, or more, with a corresponding increase in triggering reliability at middle distances too. If you use one of these Speedlites as a remote flash, and either own or are considering the purchase of the new PocketWizards, this tip is for you.

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