Which is The Best Magnification For Binoculars

Binoculars are one of those tools that will never go out of style. Depending on how you use it, binoculars can be the perfect companions for a day in the woods, during your surveillance service or in the evening that you go to the opera or theater.

There are many manufacturers today who produce binoculars. Because of the wide variety of models, choosing the right binoculars is not always easy.

It can then help if you are more familiar with certain technical aspects of binocularsDo you want to know more? Then read on!

Important to know

  • Binoculars, also known as binocle or prism viewer, are an optical instrument that is used to magnify objects at a great distance.
  • You can in principle distinguish binoculars into 2 groups: roof prisms (also called pentaprisms) and Porro prisms.
  • Binoculars are mainly used for surveillance, at sea and when observing nature, in particular for bird watching.

What you need to know about binoculars

When buying binoculars, it is important to take into account a number of important aspects. Many different types and models are available, each with specific characteristics. Below we deal with the most frequently asked questions from buyers, so that you will soon have all the information you need for purchasing the right binoculars.

What exactly are binoculars?

A binocular, binocle or viewer is an optical instrument used to magnify the display of remote objects. They consist of 2 cylindrical tubes, which contain a set of lenses and a prism, which magnify the image for each eye, producing a stereoscopy effect.

What parts does a pair of binoculars consist of?

With regard to the internal part, the binoculars consist of the following elements: a pair of eye lenses through which the images are perceived, a pair of objective lenses located at the front, and a prism located between the two pairs of lenses.

The binoculars also have a focus wheel, with which you can focus the image. Another common element is the diopter correction ring with which you can have a different diopter in each eyepiece. Certain binoculars have a universal thread as standard for attaching a tripod.

How do you use binoculars?

The first thing to do when using binoculars is to align your pupils with the exit pupils. It is important that you adjust the eyepiece glasses properly. These can be unscrewed a little to cover most of the eye. In this way, you will enjoy a more complete field of vision.

To do this, close the right eye and adjust the focus with the middle wheel until you see the image clearly and clearly. Then close the left eye, open the right eye and adjust the diopter border.

How are the magnification and diameter displayed?

To display the magnification and diameter of the binoculars, a series of numbers is used which is expressed in the following way: 10 × 50. The first digit indicates how often the target observed is increased. The greater this value, the greater the reality is displayed.

The second number represents the diameter of the objective lenses in millimeters (mm). This value influences the amount of light that enters the lens.

A larger lens means greater light power and therefore a higher quality image. There are also binoculars with a zoom lens, such as 10-30 × 40. These have a magnification that can vary.

What should you look for when purchasing?

Below we present a series of important criteria that we think you should review before you buy binoculars. A number of them are the usual criteria when we make a purchase.

Others, however, apply specifically to binoculars and are often still unknown to the average consumer.


The way in which you will use the binoculars largely determines the type that you choose. For example, you don’t need the same binoculars when you go to the opera than when you go to a nature park to spot birds.

If you want to do astronomical observations you need a different kind of binoculars. Your interests therefore largely determine the type of binoculars that you need.


The design of the frame has a major influence on the resistance of the binoculars to external factors. In the same way, it is a key factor in the comfort of the model. In general, rubber frames are the most comfortable. Good quality binoculars are water and dust resistant.

Size and weight

Since you may have been putting the binoculars around your neck for a long time, it is important not to overlook this criterion. Remember that the weight and size depending on the type of binoculars you choose.

Roof prisms are generally heavier and larger than Porro prisms. It is handy to opt for binoculars with an ergonomic design.


When choosing binoculars, it is important that you choose those with mineral prisms (made of glass). If possible, avoid organic prisms.


Magnification is also of great importance when choosing binoculars. In general, values ​​of a magnification below 8 can be considered as low values.

Magnifications between 8 and 10 are considered normal. Values ​​between 10 and 16 are considered quite high, while the binoculars with elevation capacities above 16 are very powerful.

The greater the magnification power, the greater the chance that the image will vibrate. It is therefore advisable to use a tripod with a magnification of more than 12.

For values ​​above 16, this is even considered indispensable. This is not necessary for models that have a mechanical or electronic stabilization system.

The diameter of the lens

The lenses of the binoculars are located at the front. They are the lenses with the largest diameter. The diameter of the lens determines the second number in the characteristic that every binocular has, for example, 10 × 50. The larger the diameter, the sharper and clearer the image will be. This aspect is especially important in low light and/or at night.

Angle of view

In general, the viewing angle of the binoculars is indicated in degrees on the outside of the binoculars. A larger field of vision implies a larger observed area.

This is indirectly related to the magnification capacity: The greater the magnification, the smaller the field of view and vice versa.

Exit pupil

The exit pupil is the circle of light that comes out of the binoculars and must be caught by the eye. The higher the value, the greater the clarity of the binoculars.

This is an important criterion when purchasing binoculars. The diameter is obtained by dividing the diameter of the objective by the number of elevations. With 20 × 50 binoculars, the exit pupil is 2.5 mm.

Relative clarity

The relative brightness is defined as the ability of binoculars to capture and display a sufficient amount of light to provide sharp images with sufficient contrast. The higher the relative brightness, the brighter the images you see. The relative brightness is calculated by squaring the diameter of the exit pupil.