Skip to content

Binocular Eyecups | Optics Trade Debates

Welcome to Optics Trade debates. In each episode, we talk about a different topic and try to answer the most common questions we receive about it. Today, we are going to discuss binocular eyecups:

  • what eyecups are;
  • the purposes of eyecup,
  • features, and
  • types of eyecups.

Eyecups on Binoculars

What are eyecups on binoculars?

The binoculars ease of use is directly dependent on the quality of the eyecups. People have different faces, some wear glasses and the eyecups are enabling us to use the binoculars normally. People who wear glasses, need to put the eyecups down, and people who don’t, have to put them up to get the optimal results.

Binoculars eyepiece function

If you don’t wear glasses, you need to extend the eyecups so that you can use the binoculars normally. Everybody needs a different configuration of eyecups and a different distance between the surface on which we lean to the lens. It basically means that the better the eyecups are, the bigger the group of people that can use the binoculars comfortably.

Types of Eyecups

There are several types of eyecups used on binocular:

  1. Fixed Binocular Eye cups
  2. Two-position Eyecups
  3. Multiple Position Eyecups

Fixed Eyecup

The most basic are fixed eyecups and they are very problematic. People that wear glasses can’t use binoculars that have fixed eyecups because their field of view is diminished.

It’s the same case with some Porro prism binoculars. You could squeeze the eyecups a little but then you would damage them. It’s very hard to get a good comfortable fit for a lot of different users this way.

Two-position Eyecups

The next type of eyecups is two-position eyecups. One position is for people that wear glasses and the second one for everybody else. They are better than the fixed ones but they still do not cover all the groups of users.

Multiple Position Eyecups

Best binoculars have multiple positions of eyecups and can, therefore, be comfortably used by everybody. These eyecups have at least 3 positions. the general rule that applies is that more is better.

Most of the high quality, more expensive binoculars have multiple position eyecups. The main problem with binoculars that have multiple position eyecups is the steep price, but for someone who uses binoculars a lot, it’s worth the investment.

What are fold style eyecups?

Some binocular eyecups have an additional feature. They are winged (can be fold down) for low light use so that all light which comes from the side is blocked. Some people really like this approach (fold style eyecups / twist), we have some customers who only use binoculars with this feature.

Twist eye-cups for Glasses

Winged eyecups are not mainstream and don’t work well for people that wear glasses.

We would like to thank you for your time. In case we did not answer all the questions regarding this topic, please leave a comment below or send an e-mail to us. If you found the video useful, please subscribe to our binocular channel.

Products mentioned:



  • Leave a Reply

    Your email address will not be published. Required fields are marked *