Yes, that's 2986 AGL. It's not difficult to see at that altitude,(at least not for me), being that my far-sight is very good. I like to call it "Naked-Eye Flying"!
Since that flight, though, I've exceeded that altitude, by about 200 feet. Camera got glitched while I was riding an updraft, beneath a lightening cloud, but
altimeter, recorded it at a little over 3280ft AGL, so I'd have to say that was my highest unaided flight, yet! Yes, it does start to become sort of a speck, but not quite. That's why I like to do what I've termed, "Step-Climbing". That's why in the video, you see when I'm climbing, that the plane seems to be leveling off and then pointing back horizontal..that's so, that I can keep track of it, from the ground, because when it's up that high and climbing, it become just a thin slit, in the sky, so therefore, I level off in intervals to make sure that it's still going upwards. That particular camera, is the MD80, camera. About thumb-sized and under 6 grams.