LRTimelapse Forum

I've been testing Auto Holy Grail with qDslr's intervalometer and it ramps just fine. However, when I use an external intervalometer, plugged into the camera, Auto Holy Grail no longer ramps the exposure.

Exposure was 1s, interval times were 8s. 

I'm using a Macbook Pro, USB tethered to a Canon 5Dsr, everything set to manual, drive mode is on single and manual focus.

Has anyone had this issue?

Most likely your intervalometer blocks the camera. You can avoid this with the focus-hack, see: https://lrtimelapse.com/news/intervalometer-hack/

Thanks Gunther, unfortunately cutting the focus / green wire on a Canon TC80n3 stops the intervalometer from working. In lieu of a soldering iron, I'm going to stay with qDslr's intervalometer. Thanks again for your help.