What Does 10-22×50 Binoculars Mean? Demystifying the Terminology

Binoculars are a great tool for observing distant objects, whether you’re a birdwatcher, stargazer, or simply enjoy taking in the natural beauty around you.

However, the different numbers and letters used to describe binoculars can be confusing for those who are new to using them.

Choosing the Best 10-22×50 Binoculars for Your Needs: A Buyer’s Guide

What Does 10-22x50 Binoculars Mean

We’ll break down what 10-22×50 binoculars mean and provide you with all the information you need to know to choose the right pair for your needs.

1. Magnification and Objective Lens Diameter

The first two numbers in 10-22×50 refer to the magnification and objective lens diameter, respectively. The magnification of binoculars determines how much closer objects will appear to you.

In this case, the magnification is adjustable, with a range of 10-22x.This means that the binoculars can be adjusted to zoom in and out, allowing you to view objects at different distances.

The objective lens diameter is the second number in the description and refers to the size of the lenses at the front of the binoculars.

A larger objective lens diameter allows more light to enter the binoculars, resulting in a brighter, clearer image. In this case, the objective lens diameter is 50mm, which is a good size for most outdoor activities.

Related: How to Properly Use and Focus Your Bushnell Binoculars?

2. Field of View and Exit Pupil

Another important factor to consider when choosing binoculars is the field of view. This refers to the width of the area that you can see through the binoculars at a given distance.

A wider field of view is generally better for tracking moving objects or observing large areas, while a narrower field of view may be better for observing distant objects in greater detail.

The exit pupil is another factor to consider when choosing binoculars. This refers to the size of the circle of light that you see when you look through the eyepiece.

A larger exit pupil allows more light to enter your eyes, which can be beneficial in low-light conditions. In general, the exit pupil should be at least as large as the pupil of your eye.

4. Weight and Size

The weight and size of binoculars are also important considerations, especially if you plan to carry them with you for extended periods. 10-22×50 binoculars are a mid-sized option, which means they strike a balance between portability and performance.

They are typically lightweight and compact enough to be carried in a backpack or bag without taking up too much space.

What Should you Consider when Choosing Binoculars?

Magnification and objective lens diameter are just two of many factors to consider when choosing binoculars. Here are some other factors you should consider:

  • Field of view

The field of view refers to how wide an area you can see when looking through the binoculars. A wider field of view is generally better for bird watching or other activities where you need to scan a large area quickly.

  • Prism type

Binoculars use either roof prisms or Porro prisms to reflect light and produce an image. Roof prisms are more compact and durable, while Porro prisms tend to provide a better image quality.

  • Eye relief

Eye relief is the distance between the eyepiece and your eye when you are viewing an image through binoculars. If you wear glasses, you will need binoculars with longer eye relief.

Size and weight: Binoculars come in a wide range of sizes and weights, so it’s important to choose a pair that is comfortable to hold and carry for extended periods of time.

Frequently Asked Questions

What does the first number mean in 10-22×50 binoculars?

The first number, 10-22, indicates the magnification range. These binoculars can be adjusted to provide a magnification level between 10x and 22x.

What does the second number mean in 10-22×50 binoculars?

The second number, 50, refers to the diameter of the objective lens in millimeters. This lens is located at the end of the binoculars closest to the object being viewed and allows more light to enter the binoculars.

What is the ideal magnification range for binoculars?

The ideal magnification range for binoculars depends on the intended use. For general use, a magnification range of 8x to 10x is recommended, while higher magnification is suitable for specific activities like bird watching, astronomy, or hunting.

Can I use 10-22×50 binoculars for stargazing?

Yes, you can use 10-22×50 binoculars for stargazing. These binoculars have a large objective lens diameter that allows more light to enter, making them ideal for viewing celestial objects in low-light conditions.


In summary, 10-22×50 binoculars offer adjustable magnification, a good objective lens diameter, and a mid-sized design that strikes a balance between performance and portability.

When choosing binoculars, it’s important to consider factors like magnification, objective lens diameter, the field of view, exit pupil, weight, and size to ensure that you choose the right pair for your needs.

With this information in mind, you’ll be well-equipped to choose the perfect pair of binoculars for your next adventure.

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