57f745ea8884280a06000004 wrote:But did you measure the time-difference between your exposures? If you just short-circuit remote-release terminals of two cameras, it doesn't guarantee synchronisation. The IR release should be even worse (and I didn't know A5000 supports it).
We are developing a more or less serious dual-camera solution, and with a delay circuit we are able to achieve the difference within 10 milisec. Less than that doesn't appear to be reasonably feasible - there are deviations in a camera itself. Our rigs have two Sony E-mount cameras, not necessarily the same model.
If you need action shots, flash is the way to go. Make the exposure longer than your synchronisation error, or course.