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How to choose binoculars for bird watching

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10×30 IS II

Portable binoculars with 10x magnification for comfortable bird watching.

For traveling

Travel light with our compact high resolution binoculars.

A wide view of the world

Binoculars with 8-10x magnification provide a wide field of view, making it easy to observe birds flying fast or far away. At the same magnification, models with a wide field of view allow you to see more detail around.

10×32 IS

Enjoy 10x magnification and stable hand-held images using premium binoculars with advanced image stabilization.

8X20 IS

Our lightest, smallest and easiest to use 8x binoculars with Image Stabilizer, ideal for travel, sports and wildlife viewing.

Necessary approximation

Our portable binoculars with 8x.10x magnification are perfect for bird watchers, and those binoculars that have a large aperture. for observations in low light conditions. 12x and 14x models are best used for observing small birds or distant wildlife.

Other use cases

Explore our full range of binoculars and get the information you need to help you find the right binoculars.

Focusing simplicity and speed

For bird watching with binoculars, as well as for any other animal, where the object does not remain in place, but also quickly develops speed, the field of view comes to the fore. This is because if you can’t focus on it quickly, then just miss it and that’s it. Using the focus wheel should be straightforward, intuitive and as simple as possible. The wheel should rotate freely throughout its entire amplitude, and if you find carelessness when scrolling it, then this casts doubt on the overall quality of the binoculars. The wheel, attention, must be with a non-slip surface. Ribbed, soft rubber surface. Also pay attention to its overall dimensions so that you can easily reach it, even with gloves.

How to choose binoculars for bird watching

“Closer for a better view!” Optical magnification, that is, scaling the binoculars is the first thing we pay attention to. This is important because you want to see the details, each feather. This is correct, but not entirely true, it is not always worth purchasing “super-zoom” binoculars. There are a number of disadvantages to the high power of such a device, the main of which are: You will get a much smaller field of view, less obvious depth of focus, less bright image. What if you also have large, heavy binoculars? Then the hands will tremble, the picture will be unstable. Of course, you can install it on a tripod, tripod, but in a car it is not so simple, the car should provide for such an opportunity, because you are not always on a pickup truck with a body in which you can place such a structure. Safari pros recommend bringing more than one pair of binoculars, at least two, for different situations. But if taken alone, then 8x is the most popular choice for several reasons:

  • Wider field of view. You will spot a bird in a tall tree and quickly raise your binoculars to your eyes. The wider the field of view, the more likely you will not lose sight of the target. First of all, you will notice this when you observe small, fast-moving birds that do not sit still. A small magnification in optics means a wider field of view, which is why many bird watchers prefer 8x to 10x.
  • Better image stability. power isn’t always a plus for portable optics. Many people believe that they can actually see more detail with an 8x rather than 10x instrument. over, this is what the professionals say.
  • Observation with glasses. If you wear glasses, your eyes are farther from the eyepieces. In such a situation, the indicator is important. the removal of the exit pupil, and the higher it is, the better. 15mm and up are easier to find with 8x binoculars than 10x binoculars. So to sum it up: 7x or 8x binoculars will work well in most types of terrain and in a wide variety of situations, woodlands, open fields. Images are generally brighter with a wider field of view. Also, such devices are lighter, easier to observe a flying bird.

I would like to note that powerful binoculars do not mean bad. The text above only reflected the tips of bird watchers. With 10x and even more powerful binoculars, you will receive more detailed information about the animal, in terms of color. Typically, these optics are good for spotted, brightly colored birds of prey, waterfowl, and large and wild animals. These birds tend to move more slowly and often out into the open, where a narrow field of view will also not be such a problem. When used 12x or more, you will need a very steady hand or a tripod, possibly binoculars with image stabilization. It is very important to stay away from cheap high magnification binoculars.

Binoculars for birds

If this will be your first Safari experience, it is important to remember that you are not at the zoo, and for the most part you will not be sitting next to the animal, you will not be able to pet. Choosing the right binoculars comes first. Of course, there are times when your car is surrounded by many animals, or you get as close as possible to the pride of lions. At such moments, it is enough to have eyes and nothing more. But what about the cases when your guide saw a leopard hiding in the rocks, or running animals far from you on the plains? For this, binoculars are needed, which will bring the animal as close as possible, transfer all the colors, especially if you are watching a flock of bright, beautiful African birds.

The African continent has some of the most interesting and varied birds. This is probably why birders, poachers go there in groups for catching and further resale, smuggling in general. But also true lovers of professional photography, bird watchers, magazine photographers and so on come. You might say, “I’m not going to Africa to see birds!” But, experienced guides assure that they say such phrases until they come across a flock of colorful birds. Tourists immediately take out their cameras and binoculars, and are ready to stay in such places for an hour or two.

Who knows, you can even capture footage of how vultures feed on the remains of animals, or how an eagle catches a snake, carries it to itself, into the rocks. If the colors of nature are important to you, then it is worth recommending binoculars with the best optics and multilayer coating of all elements. The Leica brand is generally recommended in such cases. And so, let’s go over this issue.

Dimensions and Weight

The size and weight of your binoculars can be very important in some situations, and almost completely irrelevant in others, depending on how, when and where you do most of your birdwatching. Lens size usually has the biggest influence on both weight and size of binoculars:

  • Most compact ones have objective lenses between 25mm to 28mm. Lightweight and compact, it is much easier to carry around all day. The compact device is also very convenient when you are traveling, because it is so easy to fit into your jacket Let’s be honest, they are useless in low light conditions. A small lens lets in less light, so forget about looking closely at the bird’s vibrant colors. For many people, the ideal compromise would be in the middle of the binocular range, which has objective lenses of around 32mm. They are becoming more and more popular, and there are many good reasons to support them. While it is true that large devices can theoretically deliver bright, high-resolution images to your eyes. In my opinion, at a scale of 8x or 10x, the quality of the optics and its coverage is much more important than the size of the lenses.

Most binoculars today have anti-reflective lens coatings. Anti-reflective coatings can make a really big difference in the brightness of the resulting image. For example, I often looked through binoculars with small lenses, but with high antireflection coatings and noted that they were superior to binoculars with large lenses, but with less antireflective coatings, like this.

Here are the main factors to consider, but not all. If you write about everyone, then you will get tired of reading, God forbid, if you have reached these lines. And there is no desire to split the article into 5 others. In the end, I would add a few words about my choice. I tested and evaluated the quality of this or that model a lot, and came to the conclusion that the most suitable model of binoculars for bird watching is the Zeiss 8 × 42 Victory FL, as well as this one from Zeiss. Yes, expensive options, but remember the saying. The miser pays twice. You have to pay for quality! Read about how to choose for hunting here. Thanks for attention.

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Binoculars device

The principle of operation of binoculars is that a beam of light passes through the built-in lenses in a special way, increasing, turning over and reducing to a thin beam. This ray is perceived by the retina of the human eye as an enlarged image. Modern devices have a more complex operating principle and a lot of customizable options. However, a classic optical device consists of:

  • Optical part, which includes eyepiece lenses, prisms and objective lenses.
  • Body, consisting of a plastic base, tube, eyecups, tripod mounts and other elements.
  • Mechanical system for regulating different parameters: focusing, interocular distance.

Digital binoculars

A special type of devices is electronic binoculars, which combine the possibilities of visual magnification and photo or video filming. Such devices are used:

  • Scientists and professional photographers to observe animals and birds.
  • Sports fans who can not only watch the match, but also take pictures of it.
  • People participating in large public events or covering their progress.
  • Tourists who like to observe inaccessible natural and cultural sites, while making beautiful shots for history.

Best for observation: binoculars or monoculars?

It has already been said above that modern binoculars or binoculars appeared thanks to the revision of a monocular or a telescope by Galileo Galilei. However, both optical devices are still used for observations with several significant differences:

  • The monocular helps to observe objects with only one eye. Because of this, the brain cannot process information optimally. The output picture is distorted, having a small viewing angle. For long-term and accurate observation, such a device is significantly inferior to binoculars in convenience.
  • The advantage of the monocular is its lightness and more affordable cost. For short-term excursion observations, it is much more profitable to purchase it than a binocular.

Touring binoculars

Another area where binoculars are used is tourism. It can be both professional hikes and amateur outdoor recreation. Such a device is necessary for:

  • Viewing the area and admiring the beauty of nature.
  • Determining the Best Camping Sites.
  • Finding successful routes for passing and more.

Often a tourist device is also called a field device and they impose increased requirements on it than on sports and theatrical counterparts:

  • It should have a good aperture ratio. That is, the size of the front lens should not be less than 30-50 mm.
  • The magnification factor is required at least 8 times.
  • In addition, the device is optimal for a hike, light and convenient to use, which does not take up much space in a backpack and does not interfere with movement.

What do the numbers on the binoculars mean??

Even the best binoculars in their class may not be suitable for certain purposes due to the wrong choice. Therefore, it is so important to understand what the numbers on the device mean. For example, the inscription on the device “8×40” shows:

  • The magnification factor of the device is 8.
  • Objective lens diameter is 40 mm.
  • Other indicators can be calculated from here, for example, twilight efficiency. To do this, you need to multiply the multiplicity by the diameter, followed by extracting the square root of the result.

How to choose binoculars? Good advice for doubters and beginners.

How to choose binoculars? Humanity does not sit still at all. We want to ride faster, fly higher, know more about the world and see further! A variety of optical instruments. telescopes, telescopes and, perhaps, the most charismatic and popular of them. have served the last aspiration for over four hundred years. binoculars.

Unlike other instruments that can bring the world around us closer to us, binoculars have a major advantage. this is stereoscopic vision. Comfortably observing with two eyes, you can feel the volume of the picture. and the greater the distance between the lenses of binoculars and the lower the magnification, the stronger this effect, also called plasticity, is felt. A good binocular is one that you don’t think about during observations, and all your thoughts are focused only on the object you are viewing. In this article, we will try to figure out how to choose a tool that will give the user a similar feeling.

When choosing any thing, you have to pay attention to its main technical characteristics. In binoculars, this is the magnification and diameter of the objective. These parameters are so important that they are traditionally indicated by the manufacturer in the model name. For example, 10×42 would mean that the binoculars have an approximation of 10 times and lenses with a diameter of 42mm.

Most binoculars have a fixed magnification, but recently, binoculars with zoom, that is, variable magnification, have become widespread. At first glance, all the advantages are on their side. versatility and ease of adjustment. But in practice, zoom binoculars are noticeably inferior in image quality to models with a fixed magnification. This is especially true of the budget segment, where the complex optics of zoom binoculars in a low price range a priori cannot be performed at a decent level. Mainly, the image quality at the edge of the field of view and the brightness of the picture suffer. But in some cases, when observing from long distances, for example, the implementation of construction work or the protection of territories, when both a general panorama and a close-up are needed, such models may come in handy. Alternatively, you can consider Yukon 8-24×50

With an increase, in general, it is clear that the magnification is greater. then the object is seen closer. And what depends on the lens diameter?

The lens is traditionally responsible for the most important role. He must collect enough light and build an image of the observed object in the focal plane. But the task of the eyepiece is to help examine the picture built by the lens. Simply put, the eyepiece works like a regular magnifier, through which you look at the picture and the magnification and field of view of binoculars largely depends on it.

Size is known to matter. The lens “draws” the image and in order to show enough detail with good brightness it must have a decent diameter. Let’s consider the main standard sizes:

  • 25mm. with such a diameter binoculars can show close objects well in the daytime, at twilight or at night this aperture is no longer enough. But its main advantage will be its amazing compactness, like the Delta Optical Active 10×25 model. Such models are suitable for both a child and an ultralight tourist, due to their small size and weight. The cost of really high-quality binoculars with such lenses starts from 400-500 hryvnia. For that kind of money, you will get a picture similar to 40-50mm binoculars worth a couple of thousand hryvnias. Of course, the brightness of the image will be lower.
  • 30-40mm. This is a good size lens for portable field and tourist binoculars, it allows you to confidently observe during the day and consider the main objects at dusk. At the same time, models with a 40mm lens of all types remain quite compact and very convenient for handheld observation, like the Delta Optical Titanium 8×42 and Delta Optical Forest II 10×42 binoculars. Such binoculars. are universal. Suitable for both a tourist and a hunter. The cost of a decent 40mm binoculars. from 1000 UAH.
  • 50-60mm. binoculars with such a diameter have quite outstanding characteristics, but this size is already the ultimate for handheld observation. A high-quality 50-60mm lens creates bright and saturated images even in cloudy weather, and at dusk it allows you not to lose sight of the key details of the observed object. Due to the tangible dimensions and weight over a kilogram, long-term observations with instruments such as the Delta Optical 7×50 ED Extreme are best done with a tripod. 7×50. this is one of the classic sizes of binoculars and can be used by everyone, from astronomers to teenagers, but most often they end up in the hands of hunters, on board ships, or as a universal tool for people who do not use binoculars very often, but who want to have a high-quality optical device Tourists should be careful when choosing binoculars of this size and be sure to pay attention to the weight of the device. One and a half kilogram binoculars with a case and accessories will noticeably pull off one of the s of the backpack, I recommend placing it somewhere at shoulder level, closer to the back. For a high-quality 50mm device, you should focus on the amount of 1200 UAH. For 56mm models. 63mm this amount will start from 2000 UAH.
  • 70mm and more. binoculars of this size are already real giants. The lens diameter of these models can go up to 150mm and even more, competing in penetration capabilities with many telescopes. Models with this diameter are often used for survey observations by mariners and the military. Such “monsters” are very popular among fans of astronomy, because watching the starry sky with two eyes is much more pleasant. The weight and dimensions of these products completely exclude hand-held observation and require installation on a photographic tripod or a special mount. In most cases, models with a diameter of 70-100mm are often used. Delta Optical SkyGuide 15×70 and Delta Optical 25×100. They are still quite affordable, but at the same time they can give a lot of vivid impressions from viewing the stellar placers of the Milky Way and large nebulae.
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Closer and darker or exit pupil settings

In pursuit of high magnification, many users forget about such an important parameter as the exit pupil diameter. In simple terms, it is the diameter of the light flux that exits the eyepiece to the observer’s eye. It is very simple to calculate it, you need to divide the diameter of the objective in millimeters by the magnification of the binoculars, for example, for 10×50 binoculars the exit pupil will have a size of 50/10 = 5mm.

The larger the exit pupil, the more light will enter the lens of the eye. In the daytime, the human pupil narrows to 2-4mm, but with the advent of dusk and night, it can expand to 6-8mm. If for observations on a clear weather day, the exit pupil of 5 mm may even be too much, because part of the light will be cut off by the eye pupil, then more will be needed at night.

Keep this in mind if you are planning to purchase binoculars for viewing in low light conditions, at dusk, and especially at night. In the pursuit of 20x magnification, you can get as little as 2.5mm exit pupil from 50mm binoculars, and it won’t be enough to see a clear and crisp picture. If a high magnification is vital, you need to increase the diameter of the objective in order to keep the exit pupil of the binoculars within 4-7mm.

Another important characteristic of binoculars is its field of view, which is usually indicated in degrees and linear values ​​from a certain distance. In the latter case, it could be 110m at 1000m, or 372 feet at 1000 yards, as in the picture below.

All other things being equal, the field of view depends on the design of the binoculars’ eyepieces. Quality models are equipped with wide-angle eyepieces that provide comfortable eye relief and a wide field of view. The preference, of course, is better to give a wide-angle model, but you need to be careful. Many ultra-wide-angle eyepieces with unusually large fields often have distortion at the edge of the field of view. This is due to the imperfect design of the eyepiece. So, choosing in the middle price range, it is worth stopping, again, at the average values ​​of the field of view of binoculars.

Galileo system. This optical design does not contain wrapping elements and, thanks to the design of the lens and eyepiece, builds a direct image by itself. But the image quality of the binoculars of Galileo’s scheme is not particularly high. In addition, it deteriorates a lot as the diameter of the binoculars lens grows.

Therefore, such a system received its distribution only in small theater and children’s binoculars. For such an application, it is quite suitable.

Porro-prism. The Porro prism wrapping system is the classic and most popular one. It achieves high light transmission and wide viewing angles. Binocular lenses, as usual, are spaced apart and are not on the same optical axis with the eyepieces. Despite the fact that the dimensions of the binoculars due to this slightly increase in comparison with the Ruf construction, Porro binoculars allow you to achieve a stereo effect and provide a three-dimensional image.

In compact models, the so-called reverse Porro system is sometimes used, when the eyepieces are spaced wider than the objectives, like Delta Optical Active 10×25 Porro and Delta Optical Sailor 8×30.

Here it allows realizing a small diameter of the lenses themselves. In this case, of course, you will not be able to achieve a special stereo effect.

Roof-prism. In binoculars for tourists, hunters and fishermen, a design based on Ruf-prisms has become widespread. It allows, with the same characteristics as Porro, to achieve significantly smaller dimensions and simplifies the process of sealing binoculars.

In active use, you can slightly sacrifice the volume and brightness of the picture in order to get a comfortable and “firmly knocked down” device, like, for example, the Delta Optical Hunter 9×63 binoculars.

Which binoculars to choose?

Theater and children’s binoculars. With theater binoculars, everything is quite simple, they have a pleasant souvenir performance, and simple optics allows you to achieve an acceptable picture with such sizes.

A simple inexpensive model with Porro or Ruf prisms and a small lens diameter of 25-40mm is suitable for the role of children’s binoculars. With a decent workmanship, such binoculars will last long enough even with very active use by a young explorer and landscape conqueror.

Binoculars for tourism and hunting. A number of already quite serious requirements are imposed on this class. In addition to high-quality optics, such binoculars must have a truly durable body and very “tenacious” mechanics. Most of these models are sealed and filled with nitrogen to prevent fogging of the optics from the inside. This is an absolute plus and allows you not to worry about dampness and fungi inside the structure.

When choosing binoculars from Porro, pay attention to the focusing mechanism. All moving parts, in the case of central focusing, must be protected from dust and moisture, but for especially extreme use it is still better to take a model with separate focusing on the eyepieces. As for the weight and dimensions of the binoculars, here it is already worth starting from the way you move while hiking or hunting. Autotourists can safely afford powerful and sturdy tools weighing up to 1.5 kg, but in the case of a long walking distance, it is better to choose a more modest model. weighing 700-800g.

Field binoculars. In the classical sense, field binoculars are a simple and unpretentious military instrument. But today the category of these devices strongly overlaps with models for outdoor activities. Such binoculars are often used to protect forest areas, reserves and hunting grounds.

If extreme use is not expected, the zoom models are worth looking at. They offer high versatility in one device and the ability to inspect highly distant objects in detail. Such binoculars are suitable for observation from observation towers or rooftops.

For bird and animal watching. Bird watchers and wildlife observers are great connoisseurs and connoisseurs of quality binoculars. Their definite preference is, as a rule, classic 50mm binoculars with really high quality optics.

How to Choose Bird Watching Binoculars : An Introduction

But there are exceptions; larger models with a larger lens are suitable for observing distant objects. In this case, for comfortable viewing, you need to take care of a photo tripod.

For fishing and sea travel. When there is a possibility of direct contact with water, the main thing is the tightness of the binoculars. In addition, it is worth giving preference to the case of bright colors so that the binoculars can be easily seen in the dark or even raised from the bottom of a mountain river.

Some eminent manufacturers have even taken care of the buoyancy of their products. The binoculars body itself or the neck strap can float, which will keep the device afloat. The approach is very competent, because when rafting on the steep rapids of a mountain river in a kayak, drowning a good half of the equipment is not at all tricky, and different stories happen on fishing.

As a conclusion, I want to say that the pursuit of the cheapest option will lead you to binoculars, which will distract you from the subject of observation with poor-quality images and inconvenient mechanics that will not withstand a load greater than lying on a shelf. Observe in quality optical instruments, watch with pleasure!

Linear and Angular Vision Characteristics

Parameters that display the angle and distance of the dimensions of a clear and high-contrast picture in the horizontal range from the observed object, as well as above it. As a rule, angular vision has a coverage range from 5 to 7 degrees horizontally, which means that the further from the observer the object is located, the wider the area of ​​observation will be. Linear vision is calculated in a slightly different way. it is measured in meters and displays the visibility in height for each kilometer of detuning. Linear vision almost always ranges from 40 to 120 meters.


  • Large weight and dimensions;
  • When working with the device for a long time, eyes often get tired;
  • Very specific functionality, suitable for solving only a certain range of tasks;
  • High price;

How to choose binoculars

Very often, when performing certain types of operations and observing specific objects located at a considerable distance from the viewer, human vision is not enough to examine a detailed picture. In such cases, it is best to resort to using binoculars. a special device designed to repeatedly approach an object and observe it. Binoculars are widely used in everyday life, almost no fishing or hunting trip can do without them, they are taken with them to the theater and to various sports events that involve a significant distance between the viewer and the object of observation. And the pleasure of contemplating this or that event and the end result of hunting or fishing depend on how accurate, high-quality and correctly selected for certain conditions the binoculars are.

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  • Highest quality workmanship;
  • The interior space is almost always filled with a special gas;
  • Wide range of adjustment for sharpness, focal length and eye lenses;
  • Exceptionally proven, branded optics;
  • Ideal for performing tasks of a certain circle;

The principle of operation and types of binoculars

Modern binoculars are compact optical devices, the main purpose of which is to bring the object of observation closer to the possibility of its detailed examination. The functionality of such devices is provided using a series of lenses of different convexity and an optical prism that refracts the light flux and narrows it down to a narrow beam, which is perceived by the retina as a full-fledged image.

Modern models of binoculars on sale can be divided into several conventional categories.

What are the best binoculars??

It should not be forgotten that universal models of binoculars do not exist in nature, and this or that model will be better only for certain conditions of its use.

Optical layout of binoculars

Within the framework of this article, we will focus on the most popular optical schemes, which use two types of prisms: Porro-prism (Porro) and Roof-prism (Ruf).

Binoculars with the classic Porro prism design are the most popular. The lenses of the devices are not located on the same optical axis, but are slightly spaced to the sides. Thus, the image is three-dimensional and more saturated. In terms of their dimensions, these optical devices are somewhat larger than binoculars with Ruf prisms. There is also the Porro reverse system, which is used in compact models, such as the Nikon Aculon T11 8-24×25. The eyepieces of these binoculars are spaced wider than the lenses.

Binoculars built according to the optical scheme based on Roof prisms are more compact and have less weight, since the eyepieces and objectives are on the same axis. These optics are most popular with tourists, anglers and hunters. Less technologically sophisticated design greatly facilitates the sealing process, allowing for reliable and test-ready optical instruments.

Safety of binoculars

In addition to the optical characteristics of binoculars, an equally important indicator that affects the functionality of the device is its security. If you are going to use the optics in near extreme conditions, we recommend choosing a model with a fully sealed enclosure with internal nitrogen filling and a rubberized housing, such as the Marine 7×50 IF WP. The rubberized coating effectively resists the device slipping out of wet hands and is able to absorb the energy of a small shock when dropped.

When choosing binoculars, you should also pay attention to the material from which the case is made:

  • Cases made of polycarbonate or structural plastic are not afraid of large temperature drops: overheating in direct sunlight or cooling during severe frosts;
  • Aluminum enclosures have good resistance to mechanical stress and are also lightweight. The lightest are considered binoculars, the cases of which are made of magnesium alloys;
  • Binoculars with metal housings are impeccably resistant to mechanical stress, but weigh significantly more than instruments made of plastic or aluminum.

Objective Luminous Diameter (Aperture)

The size of the front lens of binoculars (aperture), as a rule, is expressed in millimeters and is displayed as the second number in the marking of binoculars: 8×30, 10×40. The higher this indicator, the more the binoculars will be able to transmit light. This means that the saturation and contrast of the image, as well as the ability to carry out observations in low light, directly depend on the aperture of the optics. Binoculars with classic parameters, for example, Nikon Action 8×40 WP, will be the most optimal option for observations both during the day in good clear weather and during the evening or morning twilight.

There are also binoculars with lenses of 50 and even 100 millimeters, as a rule, these are powerful high-aperture optics that can be used for astronomical observations. With the help of these optical “monsters” you can not only observe in detail the cratered surface of the Moon, but also see the giants of the solar system Jupiter and Saturn.

Optics enlightenment

Most modern binoculars have an antireflection coating on the optical elements, which significantly reduces light loss in the lens system and provides the resulting image with a high level of contrast and brightness.

  • COATED. optics with a single-layer antireflection coating on one lens surface adjacent to air;
  • FULLY COATED. fully coated optics. One layer of antireflection coating is applied to all surfaces of the optical elements;
  • MULTI-COATED. multilayer antireflection coating of one surface in contact with the air of the lens;
  • FULLY MULTI-COATED. full multi-layer antireflection coating, consisting of several layers on all surfaces of optical elements

Also worth mentioning is the Phase Correction, which is found on premium series of binoculars, usually built according to the Ruf prism pattern. Optical devices with this coating allow you to image distant objects with the maximum level of contrast, brightness and more natural colors.

Field of view and exit pupil

The field of view of binoculars is the width of the area of ​​space visible through an optical device. This value is expressed both in degrees and in meters at a distance of 1 kilometer. Binoculars with a field of view over 65 degrees are considered wide-angle. With these optical instruments, you can easily observe moving objects, such as birds in their natural habitat.

Another important technical parameter is the size of the exit pupil, which has a direct impact on the quality of the resulting image. The higher this indicator, the better. The size of the human pupil in low light conditions is approximately 5-6 mm, so for comfortable observation in the evening, choose binoculars with a similar exit pupil size.

Removal of the exit pupil or extended eyepiece. this is the parameter that indicates how close your eyes should be to the eyepiece lens. The most common value for this parameter for most models is 9-14 mm. If you are going to observe through binoculars with glasses, we recommend purchasing binoculars with an exit pupil extension at a distance of more than 14 mm.

Let’s analyze the most basic technical characteristics of binoculars

Let’s dwell in more detail on each of the points and analyze the main technical parameters of binoculars, which directly affect the functionality of the devices.

Optical magnification

In the marking of any binoculars, you can find such numbers as: 8×30, 10×40 and so on. The first of them is responsible for optical magnification, in other words, the magnification.

This indicator indicates how many times the image of the observed object will be enlarged. There are also binoculars with variable zoom levels, which are designated as 10-30, like the Bushnell Falcon 10-30×50. The magnification in this optical device can vary from 10x to 30x.

Structurally, these are more complex devices, respectively, in terms of their quality and reliability, they are always inferior to classical constants. It should be remembered that when observing at the maximum level of magnification, any movement of the hands will be negatively displayed in the picture, increasing its jitter.

Best binoculars of 2021

Editor’s Choice

One of the newest premium binoculars on the market comes from Nikon. The Nikon Monarch HG 10×30 binoculars are not only compact and relatively portable. its weight is only 450 grams. Its body is made of magnesium alloy and is also protected from water and fog. Wearing comfort is ensured with a soft-touch neck strap. The device is supplied with a semi-rigid case for transport protection. If you are looking for solid compact binoculars “for ages”, then it is in front of you.

Magnification: 10x / Objective diameter: 30 mm / Eye relief: 15.2 mm / Weight: 450 g / Dimensions: 119 x 126 x 47 mm

Wide Angle View Water Resistant

These binoculars boast 10x magnification and multi-layer optics to keep your view out of the way. It is suitable for outdoor use by wildlife watchers, thanks not only to the aforementioned magnification, but also to its durable polycarbonate housing and waterproofing. A large 50mm lens helps the device collect light, making them suitable for use in low light conditions as well as normal daylight. A strap, lens cloth and carrying case are standard, while a limited lifetime warranty can help you make your final decision.

Magnification: 10x / Objective diameter: 50 mm / Eye relief: 17.4 mm / Weight: 768 g / Dimensions: 158 x 138 x 58 mm

Versatile Excellent optics

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