JJC FX-C600 Flashgun Output Multiplier for Canon 600EX-RT Camera - Black

Excellent for photography on wildlife, birding, wedding, evening party, portraits and more Increases the flash output by about 2 to 4 f/stops Allows you to shoot at greater distances and shoot with smaller apertures Easy attachment and removal, and folds flat for compact storage in supplied case 1 x JJC FX-C600 Flashgun Output Multiplier for Canon 600EX-RT