If you are into hunting and shooting sports, then a riflescope would be best for zooming into your target. Defense forces and intelligence agencies use binoculars to observe the enemy from a safe distance.
Even though they are pre-moistened, they do not leave any trace of residue-causing streaks on the expensive lenses. Early recorded patents indicate that telescopic monoculars were made in seventeeth century. By using your binoculars case for storage between observations, you will provide maximum protection for your binoculars.
So a pair of binoculars that has the number 7x30 stamped onto the casing is a binocular that will magnify any object to seven times its actual size, and has a lens size of 30mm. But mass production and better technologies have brought down the price substantially, so that the common person can afford them. How well your binoculars will serve you in low light conditions is described as twilight performance.
Mars and Venus on the horizon are a whole different picture when you can magnify your own vision. All around the world people of all ages enjoy bird watching.
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