Have tried a few times to discover a simple flashgun that would work on my 5D 11,Having owned it for some time i only would have used flash once,I have ruled out Youngnu on reliability issues,I would only use it for the odd group pics,I have a 500D with its pop up flash but plan to sell it as I havnt used it for 2 years now,I have a 17-35L on my 5D mk11 and need the flashgun to work with this combo,Advise appreciated.