Conclusion: The Speedlite 270EX II does a fine job when used on-camera, but the slave feature is only marginally useful. Because having to aim the flash head toward the mastter (in my case, this is my Rebel T3i camera) in order for it to receive the signal emitted by camera's built-in flash, defeats the purpose...
Pros: quiet, Good Exposure performance, Superior build quality
Cons: Slow recycling time, difficult to use as a slave
Excerpt: I bought this speedlite with a 50mm 1.8f lens and a flash diffuser. The speedlite is good addition to my arsenal, but frankly speaking i shoot mostly indoors and at night and for that the 1.8f has done wonders for me. The total cost of these three things was [$].
Excerpt: It is great because is very portable. It is not so great because the wireless function is only available for T3i canon model and futher versions. It would be nice if the flash had the option to fire it directly from the flash not only for the camera.
Excerpt: It`s small, it works as advertised BUT it could be better with minor improvements. The line of sight angle, for instance, is not good (if you want to use the flash facing a wall, for example, an the camera cannot "see" it, than it may not fire).
Excerpt: Great for quick easy fill flash. Im a pro photographer and get many assignments where I have to strip down my gear due to the assignment, bike riding, horse back, motor cycle, air plane whatever. Its nice to have a super small flash when space is at a minimal in a cockpit or on a bike.
Excerpt: I normally use a Canon Speedlite 430EX with my G12 and my Rebel XSI. Often, I use a Canon STE2 wireless transmitter and hand-hold the flash of to the side for better portrait effects. The Speedlite 430 is rather large for the G12, so I bought the Speedlite 270EX II.
Pros: Good match for Canon G12, Lightweight, Only 2 AA batteries, Works with Canon STE-2