If you are looking for a monocular to use at night or complete darkness then you should consider a night vision monocular. These monoculars use a built-in IR illuminator to allow night vision capability. They normally have less magnification in order to provide a better image (less fuzzy). Night vision monoculars range in sizes, magnification and price.
Hi, Actually im new to this. i found that Bushnell 16x52mm Monocular is quite value of money and it is also quite powerful specs that have 16x zoom on 52mm. but when i searched on the bushnell website,the monocular did not exist anymore. is it because of the model is too old? i could not find much information on this binocular and asking for some advice. thankyou
There are binoculars designed specifically for civilian and military use at sea. Hand held models will be 5× to 7× but with very large prism sets combined with eyepieces designed to give generous eye relief. This optical combination prevents the image vignetting or going dark when the binoculars are pitching and vibrating relative to the viewer's eye. Large, high-magnification models with large objectives are also used in fixed mountings.
The Night Owl Pro Nexgen looks professional and sturdy. This is something you want from a device if it is going to set you back several hundred dollars. Manufacturers of binoculars have been known to use cheaper and even substandard materials in a bid to save on production costs. In the long run, such a move can be costly. Since it is something that you will be mainly using in the dark, it makes perfect sense to go for a durable product such as Nexgen.
All binoculars can focus at endlessness. The actual trick in binocular design is how meticulously it can be made to keep the focus. Any birder that started out with a cheap pair of binoculars must have experienced standing 10 or 14 feet behind the remainder of the group to look at a bird that was inside their close focus ability. Multi-purpose binoculars possess a close focus around 21 to 26 feet. An outstanding birding binocular should have a close focus of 12 feet or less, with the existing close focus champ coming in at a mere 4 feet.
Many early binoculars succeeded in providing a three-dimensional view. But these models were largely inefficient when it came to magnifying objects, and they only allowed the user to see a narrow point of view. Focus and magnification were improved thanks to what became known as Keplerian - or refractory - optics. As of the 18th Century, binoculars began using the refracting of thick lenses to gather and concentrate additional light.
A simple trick for spotting stuff faster with binoculars: Don’t hold your binoculars up to your eyes and then pan and scan for what you’re trying to spot. You’ll never get there. Instead, with the naked eye, stare up at what you want to see, then raise the binoculars to your gaze. That’ll allow whatever you’re looking at to instantly pop into your magnified view.
Just looking at these, they have the most unique design and shape of any of the binoculars on this list. They’re very compact with soft eyecups and a nice 8x magnification which allows for better flexibility when viewing. They’re great for the child looking for some exploration out in the wild with a “real” pair of binoculars that can withstand the wear and tear of child use. With that said, let’s talk about the ATTCL Beetle.

For most types of night vision binoculars, they commonly have IR illuminators with an on and off button. However, one that has different adjustable levels ensures you are able to view things at night using illuminator levels that are most comfortable for you and your viewing conditions. Seven levels are more than enough to make your viewing as pleasant as possible.The device also features a unique technology that is designed to enhance imagery in complete darkness. Combine it with the use of the IR illuminators and you will have the best viewing experience possible.
I took my initial 17 models to a few of my favorite local Southern California beaches, mountains, and deserts for a couple weeks to get a feel for their handling characteristics and durability, and to get a rough feel for their images’ quality. But I couldn’t get an accurate handle on what actually looked better in such a familiar setting. My brain and its stored knowledge of overfamiliar birds take over, and binoculars are a lot harder to evaluate. That’s because with familiar objects, you know what you’re going to see even before you lift the binoculars.
These are the lowest price binoculars so far, around the same range as the last ones. You get a fair amount out of it though, sturdy grip, lanyard, and some other nice amenities. But again, this is more of a children’s exploration toy than actual binoculars. With that said, we highly recommend them for parents that want to give a fun gift to their young kid that wants to feel like an explorer for the day.
If the model you want to purchase has coated optics, this means that at least one glass surface on at least one lens has been covered with an anti-reflective coating. Other units nowadays are fully coated, multi-coated, and fully multi-coated. FMC might be a tad too expensive for some buyers, but multi-coated alternatives do what they are supposed to do, in that they have received many anti-reflective coatings.
Eye relief is the distance from the rear eyepiece lens to the exit pupil or eye point.[18] It is the distance the observer must position his or her eye behind the eyepiece in order to see an unvignetted image. The longer the focal length of the eyepiece, the greater the potential eye relief. Binoculars may have eye relief ranging from a few millimeters to 2.5 centimeters or more. Eye relief can be particularly important for eyeglass wearers. The eye of an eyeglass wearer is typically further from the eye piece which necessitates a longer eye relief in order to avoid vignetting and, in the extreme cases, to conserve the entire field of view. Binoculars with short eye relief can also be hard to use in instances where it is difficult to hold them steady.

BestReviews can help you separate fact from hype and choose the right monocular for your needs. We have our own labs, and we conduct tests in varying conditions on a range of products. We also talk to experts and everyday users in order to get a broad range of feedback. It's all done independently. We don't accept free samples from manufacturers because that might impact our decisions. Spending our own money on products means you can trust that our results are completely unbiased.

Levenhuk suggest that these are suitable for children of 4 years and above which is about right, however I know from experience that my daughter was capable of using the very similar Bresser ExploreOne 6x21 Junior Compact Binoculars from around 3 years old. Since then we tested and reviewed this exact National Geographic model when she was 7 and whilst she has access to loads of other binoculars this is her favourite.
There was a time when night vision devices were a reserve of the military. Fortunately, for some of us, those days are long gone. Today, almost anyone can own a night vision device. Of the many night vision devices you can own, the most popular and common is the night vision binocular, which is the subject of my article today. In this article, I will be telling you all about the best night vision binoculars and as always reviewing some of my favorite night vision binoculars.
When you view objects normally in low light, you’re limited to the electromagnetic spectrum, which determines the amount of visible light your eyes can see. IR illuminators help improve the ability to see at night in very low-lit areas. When shopping for night vision binoculars, make sure that they include IR illuminators to ensure they work in low-light or complete darkness.
Porro prism binoculars are named after Italian optician Ignazio Porro who patented this image erecting system in 1854, which was later refined by makers like the Carl Zeiss company in the 1890s.[1] Binoculars of this type use a pair of Porro prisms in a Z-shaped configuration to erect the image. This results in binoculars that are wide, with objective lenses that are well separated and offset from the eyepieces, giving a better sensation of depth. Porro prism designs have the added benefit of folding the optical path so that the physical length of the binoculars is less than the focal length of the objective.
Something of a bargain, this pair of Celestron BaK-4 prism binos boasts 10x magnification and multi coated optics to prevent anything from marring your view. Suitable to outdoor use by birders and wildlife watchers, thanks not only to said magnification but also a sturdy polycarbonate build and waterproofing, the large 50mm objective lenses on offer aid the product’s light gathering abilities, making them suitable for use in low light as well as regular daylight. Semi-attached lens caps provide both convenience and protection, while a large smooth-feel focus wheel aids operation and a long 17.4mm eye relief delivers comfort. Capable of being tripod mounted if desired, a strap, lens cloth and carry case comes as standard, while a limited lifetime warranty may well help seal the deal for the budget conscious.
With the many monoculars on the market today, it can sometimes be difficult to determine which ones are the best, especially since they all claim to offer you superb quality and great features. However, there are a few that stand out from the rest, either because of their all-around quality or because of a particular feature that makes them unique. Following are reviews of some of the best monoculars on the market today. These items stand out because of their features, their qualities, and the reviews from customers who have tried them and found that they perform excellently.

Whether you’re staked out at a kids’ concert, trying to see the stage or out spying on birds in the wilderness, the Blue Cabi Shockproof High-Resolution Binoculars will give you a window into a whole new world. The glass is designed to help you see with crystalline clarity and magnifies views up to eight times their original resolution. The rubber padding on the product means that these binoculars can take a fall and still bounce back, just as strong as ever. And adjustable wheel creates the ability to focus in on your subject and vary the magnification based on your approximate distance. And this great kid-friendly tool comes in three bright colors to choose from: blue, purple, and red. A 90-day manufacturer warranty guarantees you’re covered for any malfunctioning products for the first three months of ownership.
But, what is really impressive on these binoculars is not the fact that they measure just 5 inches by 4.5 inches and have a depth of 1.8 inches. Nor is it the minimal weight of 1.3 pounds. What is amazing is the fact they incorporate an extra wide field of view, close focus, phase correction and all the prisms are coated to help you experience a completely new level of clarity and brightness when using them. It is like watching HD television. The multi-coated lens will guarantee that you see high-resolution images and that they are extremely clear as well as full of natural colors. This is backed up by an extra-low dispersion glass inside the binoculars which eliminates color merging and maintains the clarity of an image. The magnification might be just 8 but the advanced features and the 32mm objective lens means that you will see better images than binoculars with more power! Alongside this, these binoculars are designated as waterproof and even fog proof, nothing will disturb your viewing pleasure again.
Rubber armoring protects the high-strength magnesium housing and provides a non-slip grip even in rain-wet or sweaty hands. Needless to say, all glass surfaces are fully multi-coated; outside lens surfaces feature Leica's moisture- and dirt-repellant AquaDura coating. And of course the Noctivid is waterproof and extremely shock resistant, and is purged against fogging.
In the comments for one of my other binocular articles, a reader pointed out that I had neglected to suggest binoculars for children. In response, we’re publishing this piece that is devoted strictly to kids, and will deal with the different types of optics we offer here at B&H: binoculars, spotting scopes, and microscopes. Buying for children presents a complicated set of contradictory ideas. You don’t want to spend too much on them because they tend to have short attention spans and to break things… but if you don’t spend a certain amount, what you get won’t work very well and you run the risk quashing sincere interest.
You will love the viewing experience during the day. The 10X magnification power works extremely well for daylight viewing but reduces the clarity in low light conditions. With weak light, the performance is decent. The 40mm aspherical lenses have a multi-layer coating to improve light gain and deliver bright and high contrast images in low light conditions. They have a large field of view and are easy to adjust to fit your eyes and to focus when viewing objects from a distance. In total darkness, these are not night vision and won't work.

To shoot for the stars, you obviously need a pair of binoculars with a high magnification factor – as well as ones with excellent light gathering abilities. We get both here with the splendidly named ‘SkyMaster’, ensuring this affordable pair is tailor-made for amateur astronomers, allowing for use at dusk, dawn and night. Multi coated lenses combine with BaK-4 prisms to allow for increased light transmission and therefore high contrast images with bags of detail. Stargazers will also benefit from the fact that this option can be tripod mounted, while it also has its own centre support rod for increased stability. A polycarbonate and aluminum build provides both robustness and portability, while we also get a product that is waterproofed and fog-proofed with it. To conclude, here is a binocular that could literally stand in a field of its own, while your attention is inevitably drawn skyward.
If you are looking for a monocular to use at night or complete darkness then you should consider a night vision monocular. These monoculars use a built-in IR illuminator to allow night vision capability. They normally have less magnification in order to provide a better image (less fuzzy). Night vision monoculars range in sizes, magnification and price.
Though your kids will love their Ultra Compact Mini Folding Binoculars, you might find yourself ‘borrowing’ them and using them, too. Compact and foldable, they fit easily into a pack or purse and are the perfect companion for sporting events, hiking, and other outdoor adventures. With shock-proof, rubber armor casing and water-resistant construction, these are durable enough for steady use by both kids and adults. These are real binoculars, not toys, that are small enough and tough enough for kids, but have glass lenses and visual quality that can be appreciated by adults. They are backed by a one year warranty.
A new company that we just brought into stock is GPO USA. Offered in 8x and 10x they are packed with the performance features you want: ED glass, Phase-corrected BAK4 prisms, Nitrogen-filled, Magnesium chassis, all the bells and whistles. I got a chance to try out the 8.5x50 version and they were incredible during the day, at dusk, and at night. The 42mm and 50mm both fall into your price range.
Now that you’re here, finding the perfect nighttime binocular for yourself or as a gift for an outdoor or nature enthusiast will be easy and quick. We’ve reviewed ten outstanding binoculars with night vision we believe are some of the best currently available in terms of features and capabilities, reliability as they are highly rated for their performance, and value for money. Our list includes the best infrared binoculars with true night vision and some daylight binoculars with low nightlight vision. If you’re not sure which one to choose, our buying guide explains the specifications you will come across and what you need to consider to make the right choice. Our FAQ section answers the questions you may have about how night vision binoculars work.
The enlarged eyepieces are designed to fit perfectly on your child’s eyes, allowing them to see perfectly through these binoculars. They are up to 3 times the size of conventional binocular eyepieces. It is also worth noting that the strap is designed as a breakaway; this will prevent your child from accidentally strangling themselves. These binoculars are robust, designed to be dropped without breaking and they can even get wet without becoming damaged. Although not specified as waterproof there are no parts which can be damaged by water. If they are immersed you will simply need to leave them in rice for several days to remove any fogging on the lens.

A monocular is designed to be very compact and portable. Larger monoculars with more power, bigger lenses and wider views are called spotting scopes. A spotting scope will be significantly bigger and heavier than a monocular. These are often used for hunting, bird watching or spotting subjects from a fixed location. So if you need better performance and don’t mind the size or weight, then you should consider getting a spotting scope.
The prism you may find in hunting binoculars can be split into two main categories: roof prisms and porro prisms. The first design is considered by some somewhat more usable than the second, as it’s more lightweight and has a slimmer dimension since it is in direct line with the eyepiece. It reflects the light five times. Nevertheless, the main drawback of choosing a roof prism is that it is considerably more expensive than its counterpart.
As you are watching from such a long distance and need to identify the person, we recommend a very high magnification monocular. The Yukon 30×50 “pirate style” monocular will work well in your case. Being a handheld model it is not easy to stabilise but will allow you to see enough detail to spot and recognise your subject from 5Km. Details below: https://procular.com.au/yukon-scout-30×50-straight-spotting-scope/
Again, nightlight binoculars are usually larger than daylight sets because of the complicated engineering on the inside. The more current the generation, the smaller the size without losing clarity. A smaller model is ideal for ease of use and storage but it is important to assess its features, capabilities, and read user reviews to ensure it doesn’t sacrifice quality and clarity to stay compact.

The very aggressive styling is the first thing you will notice when you unpack the LN-PB3M. Luna Optics have left the binocular’s body exposed which is unlike most common daytime binoculars that are usually covered with rubber. This design gives them a tough, masculine look. They feel sturdier than a battle tank and are lighter than they look. This is despite the gadget being made from an all-aluminum body. The binoculars come in at 1.68 pounds or 760 grams. While this might seem a bit on the heavier side, it is the standard weight for the majority of full-sized binoculars.
Binoculars are very popular, but a good monocular has a number of advantages, not least of which is giving you the same optical power for less money. There are hundreds of monoculars available from dozens of manufacturers – from models as small as your thumb to others a foot long or more. Monoculars come with a range of different functions and features, and technical terms that are specific to optical devices can sometimes cause confusion.
Do you want to be able to view distant items and be able to make them out clearly? Then you’ll want night vision binoculars that have a higher magnification. Consider a pair of binoculars with 5 times magnification. Objects viewed through them will appear 5 times closer than normal. Keep in mind that the higher the magnification, the more your hand movements will also be amplified, making steady viewing more difficult.
This new entry in the premium (and highly competitive) European optics market has plenty going for it, including a very good image plus elegant and pleasing tactile touches. The barrels are covered with a leather-looking wrap that grabs the hand without feeling slick, and two thumb swells allow the hand to find and maintain balance so that the 2-pound binocular doesn’t feel that heavy.
Magnesium  Another metal alloy, magnesium, is used because of its high strength-to-weight ratio. All things being equal on two identical binoculars, except that one has an aluminum chassis and the other magnesium, the magnesium will be several ounces lighter. Why does this matter? If you’re planning on holding them up to your eyes for long periods of time, a lighter optic will cause less fatigue. Magnesium is very strong so it will hold up to abuse, and has the benefit of being corrosion-resistant.
The available light from a scene enters the binoculars through the objective lenses. This light is composed of photons in all colors. The photons hit a light-sensitive surface called photocathode and are converted into electrons. A photomultiplier amplifies these electrons. On their way out, the multiplied electrons hit a phosphor screen producing flashes of light and emitting a visible image. The protons emitted are more than the ones that entered through the lens and the scene in focus appears brighter and clearer.
The higher the price, doesn’t always mean that it’s better. Yes, it’s a general rule that if something is more expensive than a similar product, the more expensive is likely to be of better quality. However, this isn’t always the case. When you’re calculating your budget, be sure to notate what you need in good night vision binoculars. This will help you to narrow down the necessities and keep you from spending more for something that you can get for cheaper at the same quality.
The small ring near the eyepiece also usually needs two hands to operate and in some designs can interfere with the twist-up eye cup. Being small, it can also be less convenient to operate, especially wearing gloves. The degree of twist from closest focus to infinity varies between manufacturers. Some use a very small twist[11] (about a quarter of a turn) whereas others use a full turn or more. The small degree of twist gives a very fast focus but can be overly sensitive and in some designs too stiff to use single handed. A full turn is a practical compromise.

For those that are looking to invest in a quality pair of optics, we've found that the Vortex Viper HD 8x42 offers the best balance of performance and price. These bins provide high-quality glass that created some of the brightest and clearest images we came across in our testing. In fact, the only models that bested the Viper HD in our image quality testing were those that cost more than $2000. These bins are also comfortable in hand, have a nice supple focus knob, boast a 6.5-foot close focus range, and are somewhat on the lighter side for a full-sized pair optics.

The Nikon Monarch 5 (8×42 or 10×42) are one of the best binoculars you can own for birdwatching, Safari or general use. No doubt about it. In terms of their optics, beautiful lightweight design, wide field of view and most of all image quality they are right up there with our $800-$1,000 high-end models! Therefore they have been one of the most popular choices by our more avid customers over the last 3 years. Now, regarding a monocular, if you will be using the optics often, especially for birdwatching, we wouldn’t recommend a monocular. The view is quite limiting and the design is not very comfortable to hold and stabilise for extended periods of time. It is still a great tool to carry in your bag or car and to have a “quick look” at something. But if you are viewing birds or wildlife we will always recommend binoculars. Your husband, even having only 1 eye, will find it easier to hold and use good binoculars than a monocular (again, for frequent or prolong use). The image is also significantly better since 8×42 binoculars such as the Nikon have a much wider view than a monocular – even using only the 1 eye. I have tested this theory while closing one of my eyes and using both the Nikon Monarch binoculars and the Avalon monocular. The binoculars definitely came on top!
Whereas there is a huge range of binoculars on the world market, monoculars are less widely available and with a limited choice in the top quality bracket, with some traditionally very high quality optical manufacturers not offering monoculars at all.[1] Today, most monoculars are manufactured in Japan, China, Russia and Germany, with China offering more product variety than most. Prices range widely, from the highest specification designs listed at over £300 down to "budget" offerings at under £10. (As at Feb 2016).
See into the night with our attractively priced nightvision devices, built by the best brands in the world. We offer Gen 1 Night Vision all the way through Generation 3 and even Gen 4 Night Vision. Military, Law enforcement, security personnel, nature lovers, hunters and hikers will be amazed at the ability of these night vision devices to turn the darkest nights into light, and will appreciate the discounted prices at which OpticsPlanet makes the world's best night vision products available.
Being a first generation night vision binocular, do not expect to get the kind of image clarity that a $2000 second generation binocular offers. However, in its price segment, there are very few other binoculars that can compete with the Pro Nexgen’s image clarity. In complete darkness, you can always count on the binocular’s built-in infrared illuminator
Quality construction also lends to a longer life for well cared for products. We judged each pair based on any alignment issue we could visually see, how smooth the hinges for adjusting the interpupillary distance were, we noted if anything was loose or coming apart, and we also took note of our biggest pet peeve: how well the lens caps fit. There is nothing like losing a lens cap to frustrate you on a trip.

The Discovery 5X is perfect for long-term and long-range surveillance. Simply set it up on a tripod, lay down, and start watching. The included high-performance image intensifier tubes are perfect for recognizing moving targets, including facial recognition. Overall, this Armasight is a powerful and expensive unit that’s designed for professionals.

I am looking at buying something for pest contro;l needs. I have a termite nest up a tree about 20 meters high and need to look closely at it to see if any termites come out of shell when broken, What instruments will do this for me. I was looking at a Avalon monocular 10×42 which looks suitable.. Something small and rugged would be good as I can then take it into subfloors also.

Both the Steiner 10x50 Military/Marine Binocular, B&H # ST10X50MMB, and the Steiner 10x42 Predator AF Binocular, B&H # ST10X42PAFB, would be good options for your usage needs.  As both are 10x binoculars, both would have the same amount of magnification.  The main difference would be the 10x42 binoculars would have a wider angle of view at the same distance.  The 10x50 binoculars would be better in low-lighting, though the 10x42 would have more contrast and is color-corrected for the contrast and colors seen seen in the peak human vision sensitivity range to make it easier to spot game in difficult environments.  If you are viewing in low light and need the brightest performance, I would go with the 10x50 optics.  If you will be viewing in bright to mid-range lighting, and only occasionally be in extremely low light, then the 10x42 would work for your usage needs.  For more information, you can see the following link by either clicking directly on it or by copying and pasting the link into your internet browser's address bar:
If you are looking for a monocular that you can take out in the rain without worry, the OUTERDO might be right for you. This waterproof monocular is one of the best monoculars simply because it can withstand some rain and dampness. It manages to stay waterproof for the life of the monocular thanks to the green rubber covering that encases the metal body of the monocular. Reviewers give this product high praise because of its durable, waterproof nature.
In an attempt to take image quality even higher, the Bushnell Powerview Prism Binoculars offer multi-coated optics. In addition to all optics being coated, at least one element has several layers of coating. It’s not apparent exactly how many components have been treated in this way, but a multi-coated-optics designation usually means everything looks clearer. Bushnell tells us that the Powerview binoculars have BaK-7 prisms that are intended to improve visual crispness.
Finding the most suitable alternative for creative and exciting toys for children can be a little hard, especially since there are so many options on the market. A good pair of kids binoculars will certainly bring interest and even motivate your child to learn more, be more curious and even develop new passions or hobbies. Here are the main features we consider these items should have.
We are not familiar with this specific model but it is very likely that it was discontinued by Bushnell. This happens every year or two with optics. Right now they tend to do monoculars with power no greater than 10x. Because it is extremely difficult to achieve a stable image with a hand-held monocular stronger than that. The great magnifications were “moved” to the spotting scope products over the years. A spotting scope is normally mounted on a tripod or a table-top tripod so there is no issue with high magnifications. We only know binoculars (not monoculars) that are 16×50. The Nikon one for example: https://procular.com.au/nikon-aculon-16×50-cf-binoculars/
As the next product on the list, we can say that these may be close to one of the best binoculars available today. The shockproof design makes them incredibly durable and they are designed for the long-term wear and tear that they may be subjected to. With that said, we believe these are high quality and we are eager to share with our readers two important points to take into consideration.

Learning more about the best monoculars on the market, about the features to look for, and about the types of monoculars from which you can choose might make it easier to decide if a monocular will work for you. Following are some of the best monoculars on the market today, as well as an overview of some other information that will help you to learn more about monoculars.
Waterproof  These binoculars are sealed with O-rings to prevent moisture from getting inside; but they can still fog up on you. Depending on the construction and the seals, some waterproof binoculars are also submersible for various amounts of time. Certain manufacturers rate their binoculars for limited depths for limited amounts of time; others will adhere to military standard specifications and rate them for much greater depths.
Excellent, wide FOV helps you see your subject clearly and so close you feel like you could touch it. Because they are so lightweight they are easily hung around your neck without any crinks at the end of the day, easily folded up and put in your pocket when not in use or slipped into an outer pocket of your day pack. Great for kids, they’ll condense down and are easily packed.
They weigh just 6.7 ounces which is light enough for most children to carry with them all day. This is helped by the 2-foot long neck strap; ensuring the binoculars are on hand but safe. They are compact, measuring 4 inches long by 3.8 inches wide. Surprisingly they are just 1.5 inches deep. The objective lens diameter is 21mm, the same as the first contender on our best child’s binoculars list. The ocular lens is 18mm and the view field at 1,000 yards is an impressive 384 feet. The prisms are coated and they use a central focusing system to allow for easy adjustment when using the binoculars. Just as with the kidwinz there are 5 lens pieces and 3 groups, while the exit pupil distance is set at 10mm. You can also twist the eyepieces to ensure they comfortably fit on your child’s eyes. They can adjust from 1.9 inches to 2.6 inches
A larger exit pupil makes it easier to put the eye where it can receive the light: anywhere in the large exit pupil cone of light will do. This ease of placement helps avoid, especially in large field of view binoculars, vignetting, which brings to an image with the borders darkened because the light from them is partially blocked, and it means that the image can be quickly found which is important when looking at birds or game animals that move rapidly, or for a seaman on the deck of a pitching boat or ship. Narrow exit pupil binoculars may also be fatiguing because the instrument must be held exactly in place in front of the eyes to provide a useful image. Finally, many people use their binoculars at dusk, in overcast conditions, and at night, when their pupils are larger. Thus the daytime exit pupil is not a universally desirable standard. For comfort, ease of use, and flexibility in applications, larger binoculars with larger exit pupils are satisfactory choices even if their capability is not fully used by day.