little flexible light lobe - better for about 50 to 270 EUR more EXII

I have received the lightning with my EOS M and unfortunately have to say that Canon has nothing one thing nor delivered. It may be that for the cameras in the Canon installed no flash, he will be an asset with guide number 9 - one obtains a lightning mace for the frontal assault. It would have been no mechanical power limit to make the lightning adjustable at least in one dimension (such as Nikon for its Nikon 1 models: SB-N5).

At Canon, we need for adjustment and thus for the general possibility to flash indirectly, grab at least for 270EX II. There are also only 50 EUR difference in about 3-fold guide number, slave mode and significantly greater flexibility, I would rather recommend the next larger Speedlite. In terms of volume, it turns out only slightly larger.

As noted correctly in the comments: The 90EX can be used as the master flash to trigger a group or individual, for example, 270 - a scenario that applies probably only a small part of the user, but certainly makes the 90EX can be used as low-Master.