Hello,

I'm using a Macbook Pro, USB tethered to a Canon 5Dsr. When I press the capture button or start sequence, the camera ignores the sequence and continually fires, even if I hit stop sequence. In fact it won't stop shooting until I pull the USB cable out. 

Does anyone know why this might be happening?

Thanks,
Mark

Doesn't sound normal. Did you try setting the camera to single shot? (not continuous)
But I guess you should contact the developer of qDDB, maybe it's an issue with that Camera type.

Thank you so much Gunter, changing the drive mode to fixed that issue! Huge respect for all that you've done in achieving perfect holy grail time lapses.

Thanks and glad to hear that that helped! :-)