I designed this, its a pass through camera for Pimax headsets :
It is very light, weight 10 grams.
To be plugged on the lower usb C port, so light that it stand on the headset by itself once plugged in.
Here it is on my headset, can be used with or without the silicone protection.
Unfortunately it requires a third party app like OVRdrop to be displayed in the headset using the Camera app from Windows 10 (to have a windows to display the camera so OVRdrop add it in the headset)
@SweViver or @arminelec could probably easily add a feature in PE to display it but it would not work for SteamVR.
Using Unity it should not be that hard to make a software to run in like OVRdrop, just for the camera app of Windows 10 but I dont know if it worth it, maybe if a very lot of you are interested …
I will make a few more (4 or 5 but can make dozen if needed) that I will be selling once i’ve done every tests with it, mostly trying to find something else that the Camera app of windows 10 to have access to the camera settings but I am proud to show it already.
It is a 720p/30fps camera so it need light in the surrounding to see, of course an IR one would be better but much more expensive and maybe heavier.
It can be useful in many situations ^^