I discovered gphoto2 a couple of days ago and I've been digging into the documentation but I've not been able to solve my problem.
I would like to create a star trail with my Nikon D3400. The camera should take a sequence of shots in bulb mode (exposure time 2 minutes). Ideally, there should be as little off-time as possible between two different shots. I would also like to save the frames into the camera SD card.
The command I have assembled so far is:
gphoto2 -F 30 -I 1 --set-config bulb=1 --wait-event=120s --set-config capturetarget=1
F 30sets the number of frames to shoot.
-I 1sets the interval to 1s.
--set-config bulb=1activate bulb mode.
--wait-event=120sshoot for 2 minutes.
--set-config capturetarget=1save the picture to the camera SD card.
Unfortunately, it only takes one shot, then it exits without giving any errors.
What am I doing wrong? Is it even possible to take multiple shots when using bulb mode? Are there any other approaches to achieve my goal with a PC connected to the camera?