还有这一说? 描述写着 Canon's Speedlite 600EX-RT is engineered to provide a new level of performance and reliability for professional flash photography with today's most advanced DSLRs
神物我都不知道有这东西 by the way要活,现在么这flash卖掉就500。MSRP 569. on the other hand if you want a cheap flash, plenty of them ~300 or even free for those 5D III deals.