Pug50 wrote:
The Tech Manual suggests that the Smart Gun auto-targets very strongly. Therefore it would make a lot of sense for the headset camera image to be fed into the eyepiece (IR or visible) with a HUD showing what it's targeting.
Except that in the film (which is most certainly canon) Drake's and Vas's headset cameras, which is a very similar/the same models as everyone else's, are shown to be normal cameras transmitting to the APC (Drake, check your camera). That's my reasoning beind it.
Now, it may be some futuristic camera that can handle several different functions all through that one lens, but I don't have the tech knowledge to debate that either way

One thing I have found is that Cameron's idea of military tech seems to be slightly better than that of ours in 1986. It's simple, but big and clunky so it's reliable and hard to damage.
So with a big weapon like the SG, a (and perhaps the only) practical way to sight it is with the peripheral sight and a camera down the barrel.
Exactly what image is displayed, who (aside from Cameron) knows. Maybe they have an infra-red mode.
Now, I am certain that there was a hole in the eyepiece that Drake wore - I think it's on Harry's website?
That would give some degree of 2-eye vision and I've tried it with a mock-up already.
What I'm finding with some very, very basic experiments is that my brain 'overlays' the fed camera image on top of my dominant eye vision. I got the idea off these sunglasses at a future tech exhibition years ago (like the Ideal Home Ex, but not - Dunno, I was quite young at the time) that had a mini TV screen in the lower edge of the lens. It did the same overlay trick. It's kinda hard for me to explain.
However, I've only had success standing still - I can't move around and keep visual track of both images yet!

It'll all make more sense once I've refined my set-up, I promise!!