Rifle Scope Comparison and Advice

What Is A Rifle Scope; The Basic Things You Need To Know

What Is A Rifle Scope; The Basic Things You Need To Know

What is a rifles scope? This looks like an easy question to answer but when you come to think of it, it is not one that you can do justice to within a short article such as this one. The concepts involved can be quite technical and confusing sometimes.

There are a lot of people who use these units every day but who would never be able to satisfactorily explain to you what this is. That’s, exactly what we are attempting to do in this article.

Telescopic Sight

A rifle scope is a telescopic sight that uses a telescope which is optically refracting. These devices are equipped with a reticle.

The reticle is mounted in a position that is optically appropriate so that the user can get an aiming point that is accurate. While these telescopic sights are useful in different instances where accurate aiming is a requirement, they are more commonly used with firearms, especially your rifles.

Different Types Of Rifle Scopes

There are different types of riflescopes in the market. However, these units are generally put into classes using concepts known as the objective lens diameter and optical magnification.

For example, if someone spoke about an optical magnification of 9 x 50 they would be referring to 9 times magnification on an objective lens of 50 mm.

Generally when the scope has a lens diameter which is bigger, on the eyepiece it produces an image which is clearer. The reason behind this is that it is large enough to gather amounts of light that are bigger and are equipped with an exit people that is bigger.

When you are choosing a rifle scope on fixed magnification, you have to consider what you plan to use it for.

Some types of rifle scopes come with magnification that can be adjusted. You can do this by manually manipulating a zooming mechanism.

These types of rifle scopes give the user a certain level of flexibility when it comes to shooting at different ranges and conditions of light that are different. They deliver a field of view which is much wider even when magnification settings are much lower.

Parts That Define A Rifle Scope

Rifle scopes are generally designed to do specific jobs and are equipped with certain parts that ensure they are able to do these tasks. The difference in design is the reason behind the optical parameters you will find in these scopes. We discuss some of them below.

Objective Lens Diameter

If you know a thing or two about rifle scopes, you probably have heard about the concept objective lens diameter. This is what determines the amount of light that can be obtained from the target image. In most cases, it is conveyed in millimeters.


Another of the important concepts to do with rifle scopes is that of magnification. You get the magnification of the scope when you take the focal length of the eyepiece and divide this measurement into the objective. The answer you get is the power at which the rifle scope can magnify a given target.

For example, when we talk about a magnification factor of 10, we are essentially indicating that the scope produces an image 10 times which brings the object 10 times closer.

The level of magnification in a rifle scope depends on what the scope has been manufactured for. When the magnification is lower expect less shaking and when it is larger you can expect a field of view that is smaller.

Field Of View

One of the popular concepts when it comes to rifle scopes is what is known as the field of view. This is a function of the design. It is usually given in terms of the number of meters in width that can be seen at 100 m.

Eye Relief

The concept of eye relief refers to the distance measured from the point where the eye is at, to the back eyepiece.  This is the distance that the person observing from the scope has to position the eye so that they can see the proper image.

The eye relief becomes better if the focal length of the eyepiece is longer. This relief can range between 25 mm and 100 mm in different rifle scopes.

If you are new to the whole concept of rifle scopes, we hope that at this point you have a better idea of the concepts involved. Understanding this basic concept means that when you go to buy yours, you are not totally a blank slate, at least you can ask a few patient questions to help you make an informed decision.

1 comment

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