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Examining Rifle Scope View: What Is Field of View (FOV)?

Rifle Scope View

Understanding FOV (field of view) and other features of your rifle scope setting will level up your accuracy and marksmanship.

Thanks to modern rifle scope technology and a more sophisticated lens system, there’s never been a better time to be a hunter or a bird watcher than now!

Do you want to understand what field of view is without getting too technical about it?

We’ll try to break it down for you with less scientific stuff that usually comes with the study of scope and optics.

What Is Field of View (FOV) and What Does It Mean?

Field of view is the measured area of the scene when you look through the scope from right to left.

In other words, it’s how much of the surroundings you can see through the scope.

Why is field of view important, you may ask?

This is because you want to be on the lookout for the tunneling effect, which is NOT a favorable occurrence when using rifle scopes.

The tunneling effect is when the field of view does not increase or decrease when you change the magnification.

To elaborate, what you see on the riflescope is like a tunnel. It remains the same even when magnification adjustments are made.

This can only mean that your rifle scope is not high quality and will not be good for your aim.

Normally, the field of view (FOV) is also affected when you change the scope magnification. When you zoom in, you will notice that your field of view decreases, and you see LESS of the surroundings.

When using two different rifle scopes, it is important to note that the field of view may still vary.

There are several factors that affect FOV in a rifle scope.

It could be the…

  • Thickness
  • Contour or shape of the optic
  • Scope tube diameter
  • Magnification

Magnification Explained

Even if you’re new to how riflescopes work, this isn’t so difficult to understand.

Magnification is how much closer an object appears to be compared to what the naked eye sees.

If the manufacturer says the rifle scope has a 4x magnification, it means that the target will look 4 times closer than what the eye sees under normal conditions.

Magnification is important in rifle scopes because it helps you see a far-away target better!

When buying a rifle scope, a common misconception is that a higher magnification always gives you a crisp and clear image.

This is NOT necessarily the case because it will depend on the intended scope magnification use.

Factors like distance to the target and type of range, whether open or closed, are taken into consideration.

There are no set rules when it comes to magnification, even with the commonly found configuration of your rifle scope.

But as a general guide for rifle scopes, you can try these scope magnification settings:

  • Target shooting up to 100 yards – Try a magnification range between 1-4x
  • Target shooting up to 200 yards in closed landscapes such as forests and mountains – Get more magnification, between 5-8x
  • Target shooting beyond 200 yards or hunting in open areas like deserts and open fields – Use magnification between 9-12x.

How Does Field of View Affect Rifle Scopes?

So, how does magnification affect field of view? Their inverse relationship is simple.

Increase magnification → decrease field of view

Have you ever noticed that when you increase the power of your scope with a HIGHER magnification level, you get more accuracy and details on the target, but you end up seeing a lesser area of the scene?

On the other hand, the field of view will become wider when you adjust your scope to a LOW magnification. As a result, the surroundings appear bigger in your view.

But achieving the perfect magnification scope setting is NOT an easy feat.

Similar rifle scopes will not have the same field of view at the same level of magnification. Sometimes, it can come down to the manufacturer of the scope!

Other Factors that May Affect Field of View in a Rifle Scope

Eye Relief

Any optic with an eyepiece requires adequate eye relief.

This refers to the distance between the scope’s ocular optic and your eye to see an unobstructed image of your target.

You’ll know that it is adequate because of the level of comfort it gives your eye to see the whole field of view.

More hunters prefer a long eye relief scope. It allows for a more natural shooting position. 

Exit Pupil

The power of rifle scopes is also affected by the exit pupil. It refers to the diameter of the light beam that passes through the scope to the eye.

If your scope has a smaller exit pupil, it is more focused. This is why higher magnification almost always comes with a lower diameter.

In practical applications, it will be useful in dark, cloudy weather or when you are shooting at night.

What FOV & Magnification Is Ideal for My Rifle Scope for Hunting?

We mentioned earlier that as the magnification increases, the field of view becomes narrower. So what determines field of view?

  • If you’re in the forest hunting for a target on the move, a scope with a WIDE field of view and a LOWER magnification will help your shooting game more effectively.
  • When aiming for long-range targets in a constant field, a wide field of view is not always necessary, although it can come in handy when shooting smaller targets.

REMEMBER: Magnification always plays a part and determines FOV.

When you have a smaller FOV, your scope tends to focus on the target, leading you to fail to see what’s going on in the surroundings and potentially lose an opportunity.

Most hunters recommend a variable scope with lower magnification.

Aside from magnification, the field of view is also related to the construction of the eyepiece and the scope. Let’s understand some concepts behind the parts of a rifle scope.

Objective Lenses

A rifle scope has two ends. The objective lens is the one located at the end of the scope. This is the larger objective lens that is nearest the target.

It is responsible for sending any light transmission back to the ocular optic (the one closest to the eye) and, therefore, a determining factor to achieve a brighter image. The section containing the ocular optic is the eyepiece.

If you want to know the objective lens diameter of your rifle scope, look for the number after the “X” in the scope title.

For example, in a 3-9x30mm rifle scope, the objective lens diameter is 30 millimeters. It refers to the focal length of the optic.

The typical objective lens diameter ranges from 20-56mm.

Scope Tube

The main body of the rifle scope is the scope tube. There are various tube sizes from 1″, 30mm, or 34mm.

Rifle scope tube size is based on the internal components of a scope. It is relevant to be aware of the scope’s diameter to match it with the proper mounting rings needed when attaching the scope to your rifle.

Rifle scopes also have a reticle, also known as a crosshair. These very thin markers reflect exactly where the shot will go. With the right magnification and the reticle focused,  a good aim is almost within reach!

Fixed vs. Variable Scope

Fixed rifle scopes are single magnification scopes, meaning they only have one number (example 3x). In comparison, a variable power scope has more than one magnification (3-6x).

A fixed power scope makes you aim faster and probably costs much less than a variable power scope. But the setback is it only has one magnification and is, therefore, suitable if you plan on shooting from one distance or target range only.

Get a variable scope if you plan to use a riflescope in different kinds of environments and situations. It gives you more flexibility when it comes to utility.

Frequently Asked Questions

How Is Field of View Measured?

There are varying measurements for field of view depending on the type of scope. Field of view is expressed in two ways.

  • When the field of view is expressed in feet, it is called the linear field of view.
  • When it is shown in degrees, it is referred to as angular.

Binoculars, rangefinders, and spotting scopes typically measure field of view in feet at 1000 yards. 

For rifle scopes, the field of view is measured in feet at 100 yards.

What Does FOV at 100 Yards Mean?

The field of view for rifle scopes is standardized at 100 yards, meaning the width of the field of view if you were to measure it is 100 yards away.

Most hunters only use between 50 – 150 yards and do not require a very high magnification range. A common question is whether a large or small FOV is needed to get a clear shot.

Look at it this way, a wider field of view shows you a larger area and allows you to aim more accurately at the target.

For rifle scopes, a 1x- 2.5x magnification is sufficient already. However, when aiming your scope at a dangerous game, the magnification range can be stretched up to 150 yards for safety considerations.

What Does FOV at 1000 Yards Mean?

Field of view at 1000 yards is for binoculars and other scopes used for spotting game.

It is farther than rifle scopes because the main purpose of binoculars is to enlarge a scenery by way of magnification. The width of the field viewed from 1000 yards away makes it possible to focus on a target, evaluate a terrain, or simply appreciate nature.

As earlier mentioned, field of view is a product of the diameter of the objective lens in relation to magnification, plus other design and structure factors.

The same principle applies to the field of view of binoculars and spotting scopes at 1000 yards. The higher the magnification, the less field of view.

Know Your Purpose

If you’ve reached this point after going through the avalanche of information about the field of view of a rifle scope, it’s safe to assume that you’re a rifle scope enthusiast or at least interested in rifle scope fundamentals.

There are many different rifle scopes in the market. If you are looking to buy one or scouting for a more sophisticated lens system, it would be prudent to evaluate the purpose of your rifle scope.

To help you, we listed some questions that will help you build a checklist:

  • What will be the primary use of the scope? The choices can range from shoot game sessions or target sports at a target range. The intended use will also affect the magnification required.
  • What is your budget? Keep in mind that aside from the rifle scope, you need to spend on good-quality rings and bases.
  • Where do you plan to use the rifle scope? It can vary from closed ranges or outdoors with a wider field. The specs of your scope will depend on the level of magnification you need, so location matters!
  • What kind of lighting conditions are you expecting? Think in terms of extreme conditions that your rifle scope will be exposed to so that you’re prepared for the worst.
  • What are the weight limitations? A determining factor is the location. If you will be hiking or walking across streams, the weight of the rifle scope is worth considering. After all, with game sports, rifle scopes are meant to be carried on your back.
  • What is the preferred size of your target in relation to your scope? Hunting with a rifle scope requires a varying level of magnification. A smaller target like a squirrel will naturally need larger magnification compared to a bigger target such as a  grizzly bear.
  • What are the expected weather conditions? Use your rifle scope depending on the current temperature, weather conditions, and general climate. 

Before jumping the gun, be aware of the rifle scope specifications in the market. Based on your answers to the above questions, hopefully, you will find the perfect rifle scope for you, one that hits the spot!

PRO TIP: Start with the most commonly found configuration and work your way from there. See how the scope feels, understand the ranges, and don’t forget to gauge eye comfort and natural posture when you aim.

Final Words

We hope you were able to better understand field of view, and through this article, your knowledge about different rifle scopes increased!

We’d love to hear your insights about your rifle scope combined with your adventures in the wild!

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