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The Canon Speedlite 600EX II-RT flash replaces the earlier Speedlite 600EX-RT, which launched four years ago alongside the Canon 5D Mark III. The new strobe shares a lot with its predecessor, including the exact same 20-200mm coverage and top-of-the-line guide number of 60 meters at ISO 100. It also retains the interesting dual radio / optical transmission support for wireless flash control in up to five groups, and has very similar styling, controls and display to the earlier model as well.
The Canon Speedlite 600EX II-RT flash improves recycle time by approximately 1.1 to 1.5 times when using AA batteries, and up to 2 times if you’re using Canon’s optional Compact Battery Pack CP-E4N.
The improvement to continuous firing is credited to better heat dissipation and firing algorithms.
I am a big of speedlite and prefer to shoot them off camera whenever the situation demands paired with my Canon ST-E3 Speedlite Trigger.
Additional Speedlite 600EX II-RT flash features include:
Zoom flash head covers wide focal length range of 20–200mm; maximum guide number is 197 ft./60m at ISO 100, making the Speedlite 600EX II-RT flash the most powerful flash unit in the EOS system.
Wireless flash shooting support is available for both radio and optical transmission with compatible Canon Speedlites, offering users greater functional range when using flash.
Multiple flash system support allows control of up to five groups of compatible Canon Speedlites.
Dust- and water-resistant body for reliable operation in harsh environments.
Flash-readiness indicator on the display panel, simplified button and dial operation and variable manual flash output.
New, specially designed accessories supplied include a built-in bounce adapter, plus SCF-E3 hard-type color filter sets, and a soft case. The new Compact Battery Pack CP-E4N is available as an optional accessory for improved continuous flash firing and more flashes per charge.
Illuminated dot matrix LCD panel for enhanced display information, including flash mode and usable distance ranges plus C.Fn (Custom Function) and P.Fn (Personal Function) settings.
Announced in June 2016, the Canon Speedlite 600EX II-RT will cost you Rs. 36,000/- and can be purchased at Future Forward.