On this topic (an a little off it as well), please recommend a little external flash that I can use for fill-flash on a 5D series body when traveling. I currently have a Metz Mecablitz 48 AF-1 that's great but way too big for that purpose.
The 270EX II is relatively small, sits low on top of the camera, and has some bounce capability as well. Uses 2AA batteries. Obviously, it suffers from the same issues as a pop-up flash - not very powerful and close enough to the lens that redeye can be a problem. But if you don't want to pack a 600EX-RT, it's small enough to carry easily when you might just need a little light.
Cool, I was looking at the Metz 24 AF-1, but it doesn't have high speed sync which is a deal breaker for me. How about the 270EX II, does it have HSS?
If you have a camera that has external flash control (e.g., 1Dx, 5D Mark III, 5D Mark II), you can set HSS on the 270EXII through the camera menu. Of course, depending on how high you set the shutter speed, you will cut down on the range significantly.
Thanks for your help. As you can see in my signature, my Canon bodies do have that ability so the 270EXII has now made it to my shopping list
5D3, 5D2, Sony α6000, G16 | SY14 f/2.8, Ʃ20 f/1.8, 24 f/2.8, 35 f/2, Ʃ35 f/1.4A, 50 f/1.8 I, Ʃ50 f/1.4 EX, 100L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 70-300L, 100-400L | E-mount: SY12 f/2, Ʃ19 & 30 f/2.8 EX DN, 16-70 ZA OSS, 55-210 OSS, Metabones SB | FT-QL, AE-1P | FD(n) & FL lenses