I'd appreciate recommendations for an intervalomiter for a camera, especially a Panasonic GH5 please?
I use to use a TriggerTrap cable and app. Sadly the company went bust and the app is no longer available in the Google.Play store, which is a shame as it was an excellent bit of kit. I still have the cable though.
You can have either, on my A7, setting the SS on the body makes the camera ignore whatever the intervalometer thinks should be happening, but in bulb mode the intervalometer has full control over exposure time, but this means the built in light meter on the camera doesn't work. Not a perfect solution by any means, but fine for some sub-30sec stacked exposures like the star trails.