Camera firing twice

[Avinash]

Hi Martin,

I’m trying single valve with single Camera point (Shutter+Focus) i.e. without any separate flash point however I’m triggering the speed light with wireless trigger attached to the camera. It works and I got some decent pics too, but, when I press start button on android app the camera gets triggered twice. First is almost immediately I click the start button and the other one as per the water drop sequence. what could be wrong here?

[Martyn]

Have you turned on mirror lock up?

[Avinash]

Yes I did, it is more consistent with mirror lock on, but still fails to trigger only once. without mirror lock it gets triggered erratically, like only once in 2-3 clicks on start button. I suspect this could be an issue of the camera trigger wire I’m using !! which is just a 2.5mm audio aux at the camera end and 3.5 mm at the RCA/Phono sockets end of the circuit.

[Martyn]

Mirror lockup sends a pre-drop shutter trigger signal.

Turn off ML and increase the camera trigger pulse time. The default is 50ms. Try 75ms or 100ms.

If this doesn’t work check for lose wires.

[Author]

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