What Does 3x9x40 Scope Mean? – Everything You Need to Know

What do numbers on a scope mean and to be more specific…

What does 3x9x40 scope mean?

We are here to answer your question.

What Does 3x9x40 Scope Mean?

A 3-9×40 Scope is a great choice if you’re looking for a versatile scope. It can magnify up to 9x and still maintain an accurate view. Most people use this type of scope when hunting big games.

Note: If you want to know How to Clean a Rifle Scope Lens click HERE.

What Does × Mean on a Scope?

A scope is a device used to magnify objects. Scopes are usually attached to rifles and handguns. Some scopes are designed to be mounted on vehicles such as cars and trucks. There are also scopes designed to be mounted on aircraft. These scopes are called aviator scopes. Aviators use them to view targets while flying over land or water.

4x magnification means you get four times as much power or light output as if you were using a 1x (1X) power setting. A 50mm lens is equivalent to a 25mm lens when used at 1x power.

So, if you use a 4x power setting, you’ll be getting 100% more light output than if you had been using a 1x power setting.

Before we get into the answer we need to explain what scope is.

A scope is an optical device used to magnify objects or images. Scopes come in many different sizes and shapes. Some scopes are designed to be mounted on rifles, while others are designed to be attached to binoculars. There are also different types of scopes such as reflex, variable power, and fixed power. Reflex scopes use mirrors to reflect light to your eye.

Variable power scopes allow you to adjust the magnification by turning a knob. Fixed power scopes do not have this feature. Binoculars are another type of scope that magnifies images. You can attach these scopes to your eyes using a strap.

Note: If you want to know a complete guide about scopes click HERE.

Scope Magnification Explained

Scope magnification is measured by how much the image appears larger than what the naked eye can normally see. A scope set to 4 power would be magnified to four times what the naked eye could normally see. A scope adjusted for 24 power would be magnified to 24 times what the naked eyes could normally see.

This is an example of a magnifying glass used to see things up close. Magnification is used to make objects appear larger than what you could normally see. In this case, the object being viewed is a human face.

Scope Types

Riflescopes are used by hunters to see far-away objects. They are fixed or adjustable. A rifle scope is fixed if you can’t adjust the magnification. An adjustable scope allows you to change the magnification.

Note: If you want to gain information Where are Monstrum Scopes Made? Click HERE.

Fixed Powered Scopes

A fixed power scope is a type of scope that has a fixed magnification setting. These scopes were very popular in the 1960s and 1970s because they were inexpensive and easy to use.

Today, fixed power scopes are still used by some hunters, but most shooters prefer variable power scopes.

A fixed-power scope offers the lowest magnification possible. These scopes are designed for shooting long distances. You can see your target easily without having to adjust the scope.

Adjustable power scopes were introduced when fixed power scopes were falling out of popularity.

Variable Power Scopes

Variable power scopes have an adjustable magnification range, ranging from 1x to 25x. They use a power adjustment ring, found on the eyepiece, that rotates the magnification. The eyepiece is numbered with different powers, and the highest number indicates the lowest magnification.

Variable powered scopes have almost become the industry standard as there were only a few fixed powered scopes that are still being produced by today. By far, the variable powered scope configuration is the 3X to 9X models as they offer a magnification range that will work for many shooting and hunting needs.

Note: If you want to know How To Look Through A Rifle Scope click HERE.

What Does 3x9x40 Scope Mean

What Does 3x9x40 Scope Mean?

How to Read Scope Numbers?

Fixed power scopes are used to magnify objects. A fixed power scope has two numbers: the magnification power and the size of the objective. The objective is located at the other end of the scope opposite the end you look through, and the magnification power is written before the size of the objective (4×32).

A fixed power scope has a 6x magnification and a 40mm lens. A variable power scope has an 8x magnification and 42mm lens.


What does × scope mean?

A 4×32 scope is a fixed-power scope with a 32mm objective lens. It is probably the most popular scope configuration ever invented. It is used by many people who enjoy shooting sports.

What does × mean on a scope?

This is a variable power scope with a magnification range starting at 6x and going all the way up to 50x.

A scope like this is also often listed as a 6-48×50 model as well, but I’m going to stick with my original answer because I think it makes more sense.

On a × scope what do the numbers mean?

This scope has a variable power magnification range that starts with 3x and goes all the way up to nine times. The last number in this series, 50, indicates that the objective lens is 50mm in diameter.

The magnification range of 3-9 is still very popular among hunters. Deer hunting is still the main purpose of this range.

What do the numbers on a rifle scope represent?

The first two numbers associated with the rifle scope represent the power magnifications range, and the last three numbers represent the diameter of the scope objectives. Normally, these numbers should be written as a series of three numbers with the first two separated by a dash and followed by the last number preceded by an x.

A variable powered scope with a magnification range starting at 5x and adjusting up to a magnification of 15x, with an object having a diameter of 44mm.

If you want to know more information about scopes click HERE.


Reading numbers on a scope isn’t too hard? Is it. But this guide can help you out.

Happy shooting!


  • John Moses

    John is the Editor in Chief here at The Outdoor Stores. His area of expertise ensures that there is no one better to suggest which rifles are most suitable for your hunting experience. He is also available for you to contact him personally to discuss the types of animals you want to hunt and the terrain you will be hunting on. Feel free to read his posts for expert opinion on Rifles, Scopes, Rangefinders, Bonoculars and Monoculars.

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