This is the English language. Logic has no place in discussions of English. English is a matter of convention. The convention is those things are called binoculars.
By the way.. When I see a bird in a tree and want a quick look,
I grab my "binos" .. Who says bino?
Gene (stuck indoors with too much cloud cover and too low temperatures )
Cleardarkskies says our place in the high desert will be cloudless with good transparency tonight . However.. Currently I am about 1300 miles (850 miles as the crow flies ) north in Montana and the reality is clouds and more clouds .
So, i think we need some more threads of dubious worth .
"What is the best color for a pair of binos ?"
"Are ruby coatings a sign of poor optics ?"
"The worst binoculars you ever bought new" (I like this one )
"Using binoculars upside down, a few tips"
"Effectively using binoculars as a microscope"