Why not make x2 frontal FoV, but /2 all others?
I agree.
I also think the same effect should happen when you are about to shoot with a Scoped Hunting Rifle or a Sniper Rifle (have I forgotten any other scoped weapon?)
So, when you are just wielding the rifle, your FoV is normal; but, when you press "A" (get ready to shoot) you get the same boost as with binoculars.
Surf Solar, that pic is awesome.