Ed,
A friend of ours has carried a 15x50 Canon for many years with a bandolier style strap.
I carry a Fuji HS20 in the same way with a custom made 1.5" OP/TECH strap, secured to the lugs with quick-disconnects and OP/TECH Uni-Loops (Stock #1301062).
It's a good idea to not have any fittings at all on the strap, in order to avoid binding over your shoulder with clothing or daypack straps and so on, as you bring the binoculars up. Without even a length adjustment on the strap, you need to get the length of the strap just right, a matter of trial and error, which is relatively easy to figure out.
You need to allow 4" for the OP/TECH quick-discoonect and OP/TECH Uni-Loop between the end of the strap (where it's sewn to the quick-disconnect), and the binocular lug. (AFAIK, the quick-disconnect between the strap and the Uni-Loop is not on the OP/TECH website.)
For me the right overall length is 54"; so deducting 8" for the attachment hardware, leaves the nylon webbing strap with a finished length of 46".
Terry at OP/TECH is experienced with putting together custom straps, and did this for me recently, at modest cost; her email:
[email protected].
MIke