Isn't there a lens you can put on the gopro with a full 360 x 180 view?
No; none of the mirrors has ever produced 360x180 FOV. The VFOV is always considerably less than 180.
You would need a multi camera rig to get close to 360x180 FOV video.http://www.kolor.com/videohttp://www.kolor.com/360-video/record
I didn't mean a mirror here, but more a changeable lens, replacing the original lens.
My advice is to wait.. If you do not need it now, I am certain that new and exciting technologies are being developed.. Its just a matter of time.. At the moment for me, unless you want to spend $$$$, there are no real perfect options.. There is either a Nadir issue, a Parallax issue or a quality issue.... or all three in one unit... and even a price issue.... I read there was some old technology that was never the best in the first place, has a new shell.. Those things always tend to be same old insides so same old issues... I had a couple of forum members write to me, regretting buying a certain 360 Can of rubbish, now sitting on the floor acting as a door stop.. Those units were way over priced but I am sure cheaper options will arrive in time.. I have high hopes that the Ricoh Theta will announce a Mk2 with much better image quality and perhaps a 360 video option...
Guess I'll wait. There a lot of solutions poppin up and there are a lot of solutions that might be a winner. Don't think using a dozen gopro's isn't one of them although it might work for now.
I really like the idea of the mirror, just need to find a solution to make it at 180 degree VFOV. Eye mirror itself didn't have a complete yes or no answer to this question, so it's a thing to find out. Do any of you know if there is someone that will know more about this?