There are common misconceptions when buying scopes

What I call the "Pennsylvania Fad" effects many people who decide to put a scope on their gun.  That "fad" involves thinking that you can see better without a scope during twilight and such thinking brought about the dreaded "see through rings". When I see a pump or lever action rifle with see-through rings, I immediately think of Pennsylvania.

A scope is designed to give you one focal plane to compensate for your bullet's trajectory (versus having to align a rear and front sight.) The scope with its telescopic qualities has light gathering qualities that our older eyes don't. The see-through rings also trash good shooting posture.

We've always been told to keep your cheek on the buttstock. The see-through rings lift the head off the stock and thereby create a much greater chance of paralax (the difference between your natural line of sight and the actual trajectory of the bullet you fire.) You will never find anything like those rings on the firearms of good shooters.

Next is field of view (FOV.) Many believe the higher the number of the objective lens means a larger FOV. Actually it's the reverse. A 3x9x40 has a FOV equal to or better than a 3x9x50. What the larger objective does have, however, is better light gathering qualities.

And last is "The Lifetime Warranty".  When you're standing in Idaho's Bitterroot Wilderness and your scope suddenly has the crosshairs turn to "X's", that warranty is totally useless. Scopes seldom break on the range. You don't have your gunsling slip off your shoulder and the scope hit boulders on the range. Quality glass costs extra and quality scopes have quality glass that will take those "whoops" moments in stride. You get what you pay for. Think wisely before you invest and if you can't afford a good scope for your gun, use the open sights until you can. Too often having a "cheap" scope is worse than having none at all.