It is my conviction that it is always betterand well worth the minor expenseto use a radio trigger betweencamera and flash.untilthen,on't use itwith valuable equipmentand consider your vivitar to be the equivialent of a nuclear power station.I like the 283and have two myself.They are robust and last a long time,but, their trigger voltage is just too high for most cameras.I retired mine when I bouht my first DSLRand soon after found outthat even a Hasselblsd repair man strongly suggested using radio triggers.I bought an economy model firstbut switched to a dedicated Nikon trigger sfter the chinese cheapy gave up the ghostwithin weeks.No issues since.