I am able to successfully tether a Canon 1Ds Mark 2 and LR4.1 only if no flash units are connected either through the hot shoe or wired direct. I have not found any reference to this issue and hope spmeone has a cure.
that´s the same for the eos utility if im not wrong.
when using live view - and 'silent shooting' is on... the flash will not fire using the eos utility.
im not 100% sure but i guess that´s a camera limitation.
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