Why Flash?Electronic Flash BasicsHow Electronic Flash WorksAnd Now for Something Completely Different . . .Avoiding Sync-Speed ProblemsGhost ImagesSlow SyncDetermining ExposureFlash ModesFlash Exposure CompensationRed Eye ReductionUsing an External Electronic FlashGuide Numbers, Hot Shoes, and MoreGuide NumbersHot ShoesCable ConnectionsHVL-F60M Flash UnitHVL-F43M Flash UnitHVL-F36AM Flash UnitHVL-F32M Flash UnitHVL-F20M Flash UnitWireless FlashKey Wireless ConceptsSetting Channels and Remote GroupsSetting the HVL-F60MSetting the HVL-F43MSetting RatiosRatios with the HVL-F43MRatios with the HVL-F60M