What is Eye Relief in Binoculars?

Reviewed by Dayna Hatmaker
Dayna Hatmaker

Dayna is a professional optician and has been working in this profession for 7 years. She truly understands her customer's optical needs and recommends the best product. She got her optometry degree from the University of Waterloo. Other than this, she loves golfing, fishing, boating, and hitting the gym.

Eye relief on a pair of binoculars refers to the amount a person’s eyes must be from the binocular lens to see things clearly through it. For instance, if you’re looking at something with your naked eye and move your eye 2 inches away from the object you’re looking at, everything will go out of focus.

If you’re interested in purchasing a new pair of binoculars for hunting, bird watching, or anything else that might require you to look through an eyepiece lens for extended periods, one detail that should not be overlooked is eye relief. It can make the difference between being able to see what’s going on and your neck getting sore from looking down at the ground.

Therefore, it’s imperative to know the minimum eye relief on your binoculars of choice. This article will help you decide what level of eye relief is right for you.

Please find the link below for the page on eye relief on binoculars.

Eye Relief in Binoculars?

Understanding Binoculars: Eye Relief

Which eye relief is the best for Long or short eye relief?

Do you know most binoculars come with a fixed eye relief sufficient for most people, but some people may have a short distance between the binoculars, and their eyes can cause strain on their neck? Short eye relief binoculars are usually recommended for children and those who don’t wear glasses.

Eye relief is not a matter of age, but it is a matter of level. If you’re young, you don’t need anything long, but you need to consider how long your eye relief can be if you grow older. Binoculars that feature long eye relief are generally aimed at adults and provide the most comfortable viewing experience. Let us clarify what short and long eye relief is.

Short Eye Relief:

If you have short eye relief in your binoculars, you will find it challenging to get your eyes to the lens when you focus on an object. You should notice that when you are focusing on an object with your binoculars, your eyes will move so that it’s right on the lens. This will result in strain on the neck and shoulders. This is generally the problem faced by people who don’t wear glasses regularly or people with very short distances between their eyes and the binoculars.

Long Eye Relief:

If you have long eye relief binoculars, you should have no such problems as it is specifically aimed at older age groups. You won’t need to keep adjusting your position, and there will be no pressure on your neck. You will also find that it takes considerable time to focus on an object because of the glass thickness. The long eye relief provides the best view for eyeglass wearers.

So which feels best?

Short binoculars are designed for sports, while long eye relief binoculars are suitable for wildlife enthusiasts.

What is the difference between eye relief and eyepiece?

Eye relief is the distance between your eyes and the binoculars. As eye relief increases, so the view of your binoculars increases. What minimum eye relief is your choice? When your eye is too close to the lens, you may strain your neck and shoulders, so it’s important to consider eye relief when choosing binoculars.

The eyepiece or ocular lens is the lens closest to the person’s eyes at one end of the binocular. It is the only tract through which the light rays are sent to the observer’s eyes because the binocular is equipped with a single-lens system. The size of this lens contributes to the magnification, or how much a scene appears to enlarge. Eyepiece size and the type of prism used to determine how much area in the viewed image will be visible. This is important if you want to zoom in on one part of a scene and still see everything else around it.

What is a good eye relief for glasses wearers?

For a good eye-relief for an eyeglass wearer, you must choose a pair of binoculars from 16mm to 24mm (0.63″ to 0.94″). Although this range is not extensive, if your eyes are just a little bit crossed when using heavy glasses, you need more room between the lenses and your eyes. A pair that provides the maximum eye relief will allow you enough space to wear your drinks without having a problem viewing the world around you without strain on your neck.

It’s important to know what level of eye relief is right for you.

What is good eye relief without glasses? 

For ordinary people without glasses, it is recommended 10mm to 16mm (0.39″ to 0.63″) for short eye relief binoculars and about 18mm (0.71″) for long eye relief binoculars. However, there is an extensive range because the eye relief can be different from person to person according to the factors such as age (young people’s eyes are more narrow than the elderly), personal style and eyeglasses, etc., so it is recommended to try them out before purchasing a pair of your own.

Link: https://binocularsinsight.com/articles/binoculars-eye-relief/

Can I adjust the eye relief power in binoculars?

A binocular with adjustable eyepieces comes with an eyepiece that can be enlarged or reduced in diameter. In addition, these binoculars may come with an additional smaller lens to use as a filter, which reduces the amount of light that enters the eye. This increases comfort and contrast, particularly for most glasses wearers.

Conclusion :

Long eye relief is essential for people who wear glasses or contact lenses. However, if you have short eye relief binoculars, you can strain your neck and shoulders, so it’s important to consider eye relief when choosing a pair of binoculars.

Eye relief is not a matter of age, but it is a matter of level. If you’re young, you don’t need anything long, but as you grow older and your eyes develop too, you need to consider how long your eye relief can be.

So, this article on ” What is eye relief on binoculars? ” has been created. I hope this will help you to know about eye relief in binoculars.

Leave a Comment