Hello! New member here. I have a Panny G3 and i am thinking of getting external flash. I read the reviews of the flash, Mu-43 lightning forums posts and there are things i still don't understand. 1. I plan on using the flash mostly on the camera so i have to ask will it work if i just attach it to the hot shoe? 2. What is the difference between the second and the third mark? Radio transmission build in? Will that save money on accessories or make my life easier in any way? I may use the flash off the camera for side lightning and stuff like that. What will i need (cord, trigger or something i haven't heard of)? 3. The flash weights as much as the camera body. I want to ask someone who used that or similar weight flash on micro four thirds body. Is it going to feel "flash heavy"? Do you think the handling of the camera is awkward with a big flash attached? 4. I may upgrade to e-m5, but i read there are some problems with the flash due to the lack of pop up flash on the body (or something like that, i don't remember exactly what i read cause it was some time ago). Can someone confirm or deny that? PS: Sorry if there are grammar mistakes, english is not my native language.