Canon Speedlite 600EX The new RTengineered to deliver new levels of performance and reliability for professional flashphotography with today's most advanced DSLR. Wirelesstwo wayradio communication with, Speedlite 600 EXRTallowsfotograferuntuk extend their creativity using a radio triggersnirkabel Speedlite reliability. The Speedlite 600EXRT offersanextended zoom range and a higher guide number, plus a number ofimprovements over its predecessor in two shades of theoperationand.