Hi All, I know this post goes back a bit but I've only just found you and, as a real newbie, I could do with some advice please.
I too have a pair of Russian BNU 12 x 40 binoculars. They were a present from my Mum and Dad in 1977. They've been superb and I still use them as I can get a great image ... if I close one eye!
Indpendent Focus ring on the right eyepiece no longer moves and I have what I've just learned this afternoon is a collimation issue (or so it seems). As Mum and Dad are no longer with us I'd really like to get them back to their former glory, your thoughts please for a real novice.
Many thanks.