excellent reliable speedlight with reliable output all the way throught. a big plus for the wireless options on it fits perfectly with my camera's body. excellent in Automatic and in Manual modes

Superior build quality; Reliable; Durable; Easy to use

with this modifier light is reduced by 2 stops the casing is made of thick plastic which i think is a little too thick not for the amateur photographer.

Excellent! Very versatlie and multi-use flash - perfect for almost any situation and covers Canon's low-light deficiencies perfectly! top-notch prodecut and a very competitive price!

I have only had a small chance to use this, but so far I love it. I have a 5d Mark 3 and the camera will controle the flash through the menu. It is nice to have a flash that will work with the full range of my 70-200mm lens. The only down side is the price, but Canon had $50 off.

Easy To Use; Fast Recycling; Powerful Output

Heavy

This flash completely enhances the quality of the pictures caught by my camera. It works perfectly in the night. Everything even in the complete darkness is captured with precise quality. It also comes with a rechargeable battery

excellent bright lighting

Fast Recycling

Bulky

Simply the best flash made by Canon and the right way to go for professional use. If your not making money off this unit you could step down a model but if your going to step up and start making money this is your model.

Daunting is sitting down at the keyboard to attempt to do justice to a review of Canon's flagship flash, the Speedlite 600EX-RT. Few aspects of an image are as important as the lighting – arguably being second only to the subject and perhaps the composition?

Canon 600EX RT (18.7 oz./529g with 4-AA eneloop cells, 2.5 second measured recycle time, measured ISO 100 guide number of 29 meters/95 feet at 35mm, rated guide number 36m/118' at 35mm, 20-200mm zoom head with 14mm wide panel and catchlight card, about $470 new ).

The radio system lets you easily control all your flashes from the camera with some using TTL and some on manual and even switch modes without having to touch the flash. It's just amazing.

Supports both radio and optical triggering, so if you have the 400EXII's you can slowly convert over without having to buy a radio transmitter on day one; Great power and good batteries will last for quite a while

Price