I have a Samsung Galaxy Tab 2 10.1 "and I did root, used all the apps you have on the market and none of them identified my 650D ... Is it the usb cable? For the computer recognizes the camera using the same cable. ..
Well, I can use it on all my unrooted Android 4.0+ devices. (HTC One X+, Nextwolf 7, Asus Memopad FHD 10 the one with the x86 cpu). Root does not change that (checked it).
Only for the ones that don't support OTG Host, you will need root, to "unlock" the USB host function.
Maybe you should try it on a different device? If This does not work, it might be your cable. I use the original cable that came with the Camera, and a 4€ OTG host cable from Amazon.
Maybe there is even something messed up with the host function, if you use custom roms and different kernels.
However I still wonder why the ML app does not recognize the 650D. Maybe it has something to do with the 650D beeing in a alpha state. Or simply you need to adjust the App. I don't know for sure...
I am not even sure who develops the ML app.
@Frendo:
1: Are you talking about pictures? Flip the touchscreen and touch your eyes to focus. That should be all you need.
2: Yes, but you can easily remove it, with a few simple steps.