Alongside the GH5, Panasonic released the excellent Lumix Tether application. This app enables tons of camera controls from a tethered PC via the USB-C port on the GH5 and GH5S (G9 is also supported). Though video and stills are supported, it is a stills oriented application and there's a lot that isn't covered in Panasonic's user manual. Here's a few useful things that I've learned from using the Lumix Tether app with the GH5.
A very appealing feature of Lumix Tether is having the Live View monitor on a PC monitor instead of a tiny 3 inch screen. Larger external monitor with advanced features such as recording, peaking, LUT application, and waveform monitoring are already a popular GH5 accessory. A larger monitor makes it much easier to preview focus and understand what the final product will look like. However there are some issues to note.
Live View Lag
I tested the Lumix Tether Live View against the monitor on the GH5 itself. The test conditions were setting up a timer on ipadstopwatch.com and taking a picture of both the Lumix Tether Live View and GH5 monitor using my phone. I ran the test 5 times and checked the difference between the two.
|GH5 Monitor Time||Lumix Tether LV Time||Difference|
The mean, median and mode lag is 0.172 seconds. Anecdotally, this is more than usable for anything that isn't fast action.
Magnification is the killer with tethering, as you'll be able to check focus extremely well with your PC monitor with this feature.
No power is supplied via the GH5 USB-C port. Sorry.
Output and Transfer
In video mode, the option to save footage directly to the PC only is available. However, the function does not work. All footage is saved to the device and transferred to the PC. Therefore, you will need an SD card in the device to record video
Unlike external recorders like the Atomos Ninja series, tether mode records internally. So you'll have access to the same codecs, framerates, etc that are available with normal untethered recording.