Pro camera like 5D and others lack an internal flash. That's pro. And that also ignores the fact that build in flash is great to make daylight street photo's 'pop'. Since I'm interested in buying pro gear I will also need and external flash, usable to be all the time on camera during long walks. It may be connected either by sync cable or hotshoe. I'm not interested in swivel heads, mega distance blazing light. Those I have gathering dust in a box. A bit of light intensity control would be nice, either manual or e-ttl. Flash power maybe limited to 4 meters. Small is also important, because it is less impressive while shooting street life. I found Sony had some ultra lightweight (52grams) Sony HVL-HFL1 for video and photo. Perfect for 5DII . Ofcourse it has Sony contacts and not Canon. I'm not afraid to tweak hardware but I doubt the possibility to make a conversion plug. So any suggestion for a matchbox sized flash? Or suggestion for a matchbox sized flash that can be adjusted to sync contact?