I bought the Yongnuo Speedlite YN560-II recently as my first ever external speedlite. Due to being inexperienced and not doing my research properly, I find that my Canon 5D Mark III doesn’t register this speedlite in the way I expected (my mistake). It is manual only, non-TTL. The flash fires and I can control the output level on the external unit itself – wonderful – but I can’t use my camera’s own menus to change settings (such as the one I really want to use, rear curtain sync). On accessing any of the Flash menus, the error message reads, ‘This menu cannot be displayed. Incompatible flash or flash’s power is turned off.’. At least I can use the flash, even though it’s manual, you might be thinking. However, my situation is that I am training to be a pro photographer and I think it’s necessary to understand all the functions on both my camera menu and the speedlite itself. I don’t know who I might be working for in the future, and if I don’t know how to use the camera’s speedlite menus and settings, that is not going to look very good. I’d rather familiarise myself with everything I can, even though the manual Yongnuo is perfectly usable to get experience doing portraits etc. I’ve heard of Pixel King Pro E-TTL Wireless Flash Triggers or Phottix Odin but I don’t know if it’s worth the hassle or would even work, or which product to buy. I have also heard that this solution isn’t as robust or reliable. I was wondering if anyone knows a workaround to be able to access this speedlite through my 5D Mark III, or whether, given my aims, I’m just going to have to bite the bullet, sell this one and buy a Canon flash (which one is good enough but won’t break the bank?) plus wireless controller too. I would love a solution that will enable me to build my business and experience sooner rather than later because the delay is holding me back and I need all the practice I can get. Thank you all for reading.