"Andy Dingley" wrote in message
...
On 29 Sep, 11:01, "dennis@home" wrote:

Has anyone recommending dismantling binoculars ever done it?

I haven't seen anyone recommending it. However if you have to, you
have to.

They are extremely difficult to collimate especially to more than one
person.

No, they're a piece of ****. They're designed for easy mass production
and they're not particularly sensitive to mis-alignment anyway. 10×
magnification? It's hardly rocket surgery.

Apart from, I think, a huge pair of East German border guard jobbies,
I've not seen any binoculars that were adjustable to collimate anyway.
The lenses are centred, and the rest is down to trusting the lens
mounts to be machined accurately. Re-assembly is just the reverse of
dismantling.

Besides which, what does "collimate to more than one person." mean?
Collimation is collimation, it doesn't vary between people. Even for
your pointy little head.

Not sure what is meant by collimation here (usually associate this with
microscope light sources), but, without my glasses on I do find there is not
enough adjustment on one of the eyepieces to correct for the difference in
my eyes: so maybe that is what is meant. I can usually find a way to tweak
the length of one ocular a little though.

S