Vast majority of the FPV systems out there are indeed monoscopic. Stereoscopy is too resource-intensive for FPV, and it never caught on. The only viable digita

Vast majority of the FPV systems out there are indeed monoscopic. Stereoscopy is too resource-intensive for FPV, and it never caught on. The only viable digital system out there, DJI’s Air Unit and their Goggles, is really pushing the boundaries of what’s possible with available silicon, and they can only do a single-channel 720p low latency video stream over the air. Attempting to do digital FPV in stereoscopy would require additional compute on the encoding stage, and an additional Tx on the air unit. The AirUnit is rather chunky as it is, so having something that can do 2 simultaneous 720p channels would hardly be viable for a 5” drone, let alone 3”. It would also use extra radio channels too, halving the number of available channels (determining how many pilots can fly simultaneously; currently at a max of 8 - at least theoretically). The rest of video systems on the FPV market are still analog (in PAL/NTSC). Interestingly enough, a few years ago a rather obscure Chinese FPV brand Skyzone had goggles which supported a stereo FPV camera block. Basically, their rig had two cameras, each transmitting over its dedicated video Tx, and the goggles were equipped with two video Rx (VRx) units, each capable displaying video on a separate goggle display (left/right eyepiece). Most analog VRx units used for FPV today have two separate receivers, but they are used in ‘diversity’ mode, where they are tuned to the same channel. Skyzone also had twin Rx setup, but they could do both diversity and stereo. Thinking of it today, it was an amazing piece of speculative innovation that FPV is rife with, but as I said: it never caught on. People that used it were like ‘wow, it’s different...’ but I never saw anyone do a build with that for something more than a ‘Hey look: stereo FPV’ type of YouTube videos. My guess is: you need to get rather close to stuff in order to be able to perceive depth afforded by a stereoscopic system with cameras set at a distance small enough to fit on an FPV drone. Possibly a bit too close, for an FPV drone. So it never really made sense I guess, and so it never caught on...