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 Introduction of Ohter Digital Camera Binoculars

Bushnell Image View 8x21 Binocular w/VGA camera

These Busnell binoculars sport a pretty decent image clarity, for the price. If you happen to be an Apple Mac user, you'll want to steer clear of these, as they're not totally compatible. They go for around $50 or a little more on many of the online shopping sites. They provide the flexibility of taking both still photographs, or video. This is a great binocular camera for the casual user, but the more serious bird watching type, may want to spend a little more money. Specifically, take a look at the last digcam binoculars (From Barska) in this review. It uses a standard USB connector to upload pictures and videos taken to your computer.

BinoCatch 4x28 Digital Binoculars w/Built-In Digital Camera/Camcorder

These usually go for about $50, but I've seen them in the $20 price range as well. A bit of a toy set, but something that may be fun for the kids, or maybe a one time usage. You get a pretty good software bundle with it for the price. ArcSoft Photoimpression, My DSC, and PCCam are all included that alone makes it worth a few bucks. The formfactor construction is a little on the light side. The plasctic used could have been better, and you'll have to treat this one with a little care because of it. You do, however get 4x28 magnification, video capture, and a few extras. It's kind of 50% camera, and 50% binoculars.

Barska Point 'N View 4.0MP 8x32mm Binocular

This 4MP version is a big improvement over prior versions that were 2MP.  The flip up LCD screen is a nice feature as well.  It hides away when your just using the binoculars, but is readily available, when you need to take some quick pictures or videos.  It's often difficult to find a good digital camera, and good binoculars in one package, but Barska seems to have found the right blend.  It's far nicer than the Vivitar digital camera binoculars I was looking at previously.  An optional SD card can be used with these binoculars.
 
Source; Promotional Binoculars, Gift & Promotional Binoculars, Monocular Telescope

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 Something About High Definition Binoculars

High definition is a 21st century term that we are starting to accept as second nature. It started in the entertainment industry but is now everywhere, and high definition binoculars are no exception. High definition refers to the quality of image that is obtained, whether it is crisper, clearer images on your television screen or the images you see when you have high definition binoculars.

There is a massive choice when it comes to selecting your high definition binoculars. For example Carson's HD Binoculars offer an excellent range of good choice of prices and features, whether you are more interested in the weight of the binoculars or whether an element of waterproofing is important to you. Thankfully, as the market is now more competitive you will no longer need to break the bank to get yourself a pair. There are some excellent choices that offer a really vibrant color and a chance to see brighter images that can still return excellent results even when the light is really low, which is great if you want to catch the elusive deer at dusk.

You need to look for high definition binoculars that have excellent quality lenses. All companies have their preferred favorites, so the best thing you can do is shop around. Ask a lot of questions and read reviews to see what is proving popular and what isn't. The secondary features you need to consider are the shell material. Do you prefer rigid plastic or a more tough rubber finish which will survive the accidental drop? How heavy do you want your binoculars to be? Some are quite heavy and need two hands to work well, and again this is personal choice as some people prefer the chunky feel whereas others are seeking out a very lightweight set of high definition binoculars that can easily be held by one hand. It really depends on what you want to use them for most, and how far you are going to be carrying them.

Consider whether you are being sold any accessories as part of the price, as things like a neck strap and a protective case are pretty key, and you want to make sure that you also get the case that you need in terms of durability. Are you taking your high definition binoculars skiing, for example? Are they primarily for use at home where you have a host of birds and wildlife coming into your garden?

It is fair to say that high definition binoculars are one of the newest things to hit the market, so some skepticism is normal. However, do not be afraid to get hold of a pair to test out as you will be very surprised by the result, even better if you can take an 'old style' non high def pair out at the same time so you can view the images in both formats. You really will notice the difference, as the images appear so much clearer and crisper than you ever thought possible.

 

Source：Promotional Binoculars , Gift & Promotional Binoculars ,  Monocular Telescope

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 Select the Right Telescope Binoculars for Better Stargazing

Choose appropriate telescope, and help your nightly attention, you want to know the horoscope select target and selection approach, when the choice you should pay attention to what standards and requirements? Look below the ace telescope practical for you do simple things.

There are a number of different kinds of binoculars on the market today that can be used for astronomy. But one thing to insist on is that your desired telescope binoculars have what is called a porro prism. This prism is geared for low light viewing and ideal for stargazing.The more common prism utilized in binoculars is called a roof prism and is not conducive to good nighttime viewing. But technological advancements have allowed for the upgrading of optical and lens capabilities and improved viewing quality. Despite these upgrades, you will still benefit by using the porro prism binoculars. Their quality is better for astronomical uses and generally cost less.

When selecting telescope binoculars, make sure they have the capability to be mounted on a stable object, preferably a tripod. When looking at smaller objects in the skies, any movement of your binoculars will result in a blurred or shaky image.Whether you are stargazing with telescope binoculars or a standard telescope, a fixed placement will enhance your viewing experience. It is really worth the cost of purchasing a tripod and avoiding all the frustration that comes with constant re-focusing on your desired celestial body.

Telescope binoculars are an alternative to the traditional telescope and can increase your stargazing pleasure. If you prefer viewing the night skies with both eyes open, this is the perfect choice for you!

 

 

Source:    Big Porro Binoculars ,  Monocular Telescope
Read more: http://www.nbbinoculars.com/blog/

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 Binoculars & Porro Binoculars：Technical features

Better use of the telescope in the market, price and practical choice, just understand the telescope telescope concepts and some basic design is not enough. For example, in porro telescope to buy true to my own satisfaction, become a use telescope ace, you also understand all aspects of porro telescope technical characteristics. The following article can give you do a very good guide.

Magnification/power: A set of technical detail imprinted on any pair of binoculars could be something like this: 8x42, or 10x50. The first number (8, 10) is the magnification number, the "power" of the binoculars. The object is magnified by 8 or 10 times, which means that it appears to be 8 or 10 times closer than seen with the naked eye.

Objective lens: The second number (42, 50) is the diameter of the objective lens (in millimeters), i.e. the two big lenses at the front of the two barrels. The bigger the objective lens, the more light is captured, resulting in a clearer and brighter image, which is important when used in fading light or when focusing on something in the shade of a tree. Objective lens opening is also called the "aperture" of the binocular.

Is more power better? This matter is important for understanding binoculars. It seems obvious that the bigger the magnification, the better  binoculars. This is not true. The more powerful a binocular, the less bright the image - which will be a problem when focusing on something in the shade of a tree or in dim light in general. More power also has an impact on field of view.

Moreover, more power is totally useless unless the binoculars are kept perfectly still, which is not easy at all. Some binoculars do have image stabilization which electronically reduces movement for steadier viewing, but these are very expensive. A magnification of 8 xs is generally regarded as ideal for general, game and bird viewing.

Field of view (FOV): Another set of technical detail which is imprinted on the binoculars, could be something like this: 367 ft. at 1000 yds. This is the field of view, the width of the view at the particular distance. In this case 367 feet at 1000 yards. Could be designated in meters or in degree. Field-of-view is primarily determined by the design of the eyepieces, but magnification also plays a role.

The exit pupil: The exit pupil can be seen by holding the binoculars at arm's length and looking through the eyepieces. The pencil of light you see is the exit pupil. The actual diameter of the exit pupil is computed by dividing the diameter of the front objective lens (in millimeters) by the magnification of the binocular. So, in the case of a 7x35 binoculars, the diameter of the exit pupil is 5 millimeters. The relative brightness index (RBI) is an indication of image brightness. It is computed by squaring the exit pupil. So the RBI of our example is 25 (5x5=25). A RBI of 25 or greater is considered good for use in dim light.

Eye relief: For every pair of binoculars, there is an optimal distance between your eyes and the eyepieces, which is called eye relief. If your eyes are too close to or too far from the eyepieces, you can't see the whole picture: part of it is blacked out. So, if you happen to wear eyeglasses, you have to make sure the eye relief is at least 15 mm. Except in the case of very expensive binoculars, field of view and eye relief work against one another. If the manufacturer increases the one, it is at the cost of the other.

Coating of lenses: The lenses of all binoculars will be coated with anti-reflective coating, which is applied to enhance the quality of the image. Make sure you choose a "fully multi-coated" pair of binoculars. In the case of roof prism binoculars "phase correcting" coating is also necessary.

Waterproofing: A waterproof model will not only be less likely to fog up internally, it will also be better sealed against dust and dirt.

Close focus: Focusing at a distance is no problem for any pair of binoculars; focusing at close range, however, is a totally different matter. For watching birds or butterflies you will have to look for a pair with a close focus range of less than 4 meters.

The focus speed: If you need the binoculars for watching wild animals, in particular birds, the speed of focus is important. While following a bird in flight, you need to change the focus all the time and if your binoculars do not allow for quick adjustment, you will struggle all the way.

 

 

 

 

Source:   Big Porro Binoculars  ,  Monocular Telescope
Read more: http://www.nbbinoculars.com/blog/

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 Big Porro Binoculars-Knowledges Of Chosen

Before you do one thing or choose something , you need to have some understanding of them, just can make the right choice. Choose a good telescope also is same. Choose one you like the price and can accept porro telescope, first you must understand telescope, and the related knowledge of porro telescope before, do a point positioning, and you can make a good after a second choice. Again see the following article, I wish you can make the right choice!

There are a few things that you should look for in any binoculars and that will definitely have an impact on the kind of binoculars that you are looking for. The main thing to define is the purpose of the binoculars. Define the need for the binoculars. It may be used for general field purpose or general travel or for specific type of hunting or birding. Each activity requires certain things which may not be present in the binoculars that you are trying to buy. For example in the birding binoculars the field of view should be wide whereas in the hunting binoculars the field of view may not be that important.

For binoculars which are less than the 100 dollars price point the main thing that you need to have is good image and good brightness. That will mean good lenses. A lot of binoculars are now available with Bak-4 prisms and also have fully multi coated lenses. Both these things combine to form a very good image.

The price below 100 will mean you will have to compromise on a lot of things and one of the main things among several is the design. The roof prism construction is expensive and complex to make and hence there are not a lot of options for roof prisms binoculars at this price. Even if there are some which are available at this price point then these will need to be evaluated for image quality. The best bet is to go for the porro prism binoculars. Porro prism construction is considered old fashioned but the main point here is that they will give you good quality at low price. The reason is simple as porro prism binoculars are not very complex to manufacture which translates into less costs and good quality.

 

 

Source:   Big Porro Binoculars ，Monocular Telescope

Read more: http://www.nbbinoculars.com/blog/

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 Children & Binoculars

From a design perspective, one of the most important aspects of a binocular suitable for children is interpupillary distance (IPD). This is the distance measured from pupil to pupil between a persons eyes, and because children typically have smaller faces than adults, this distance is obviously much less. IPD for most children ranges from around 53 to 57mm. Binoculars adjust for different interpupillary distances by moving the central hinge mechanism, so make sure that any binocular model you buy for a child adjusts to a narrow enough setting.

Kids binoculars should also be kept down to a reasonable weight. Most full sized binoculars weigh in at 20 or even 30oz, which a child will soon tire of carrying around. The overall size of the binocular is also important, so it is a good idea to ensure that the binocular is not too wide for their smaller fingers to reach the focusing wheel. However, compact 8x20 or 10x25 roof prism models do not usually make a good choice for children. Good ones are very expensive, and correct eye placement can be tricky so they are not the easiest of binoculars to use.

Finally, close focusing distance is another feature greatly appreciated by children. Children will have a great time getting a close up look at insects and bugs if they lose interest in what their parents are watching. So if you can track down a suitable binocular that can focus as close as one or two meters, that will be an added bonus.

 

 

Source:   Compact Porro Binoculars , Monocular Telescope
Read more: http://www.nbbinoculars.com/blog/

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 Some things to keep in mind choosing bird watching binoculars

Objective lens diameter: This is the front of the birding binoculars where the light enters the optics. 30 to 50 mm is the norm for a good optic lens. Compact pocket binocular optics usually come in sizes below 30mm. The larger the optic lens, the heavier the binocular.

Magnification: The usual choice for most birdwatchers is 7, 8 or 10x magnification in overall use. You don't want to have too much power because it will give you a smaller field of view, as well as less light entry and poor image quality. The binoculars will also be heavier and harder to manage and thwarting shaking will be more of a challenge.

Exit pupil: This is the diameter of light you can see in the eyepiece. 4mm exit pupil size is recommended.

Focus adjustment: The speed that you can refocus your image is very important. The best bird watching binoculars will allow you to refocus quickly from bird to bird.

Eye relief: Birdwatching with glasses can prove a real challenge unless you have eye relief that allows you to hold the binoculars away from your face and still get a full field of view image.

Prism Design: Another important aspect to consider:

Porro prism: In this case, the optical is Z-shaped and will give you a wider, more bulky and heavy set of binoculars that are not as well sealed as the O-rings are on the outside which allows in dirt and moisture. They are, however, less expensive although not as durable.

Roof prism: With a roof prism, you can look towards a more slim and lighter weight design. While these binoculars are more expensive, they are easier to waterproof or to make water resistant. Considered more durable than Porro optic binoculars, they can withstand a lot more abuse.

Lens coatings: Lens coatings let more light through which results in a high quality image with the best coating being a fully multicoated lens. A water repellent coating will also enhance your birding binoculars, which will help with light rain and fog conditions.

Lens coating abbreviations are listed below:

- Coated (C) means there is a one-layer coating on one lens surface.

- Fully coated (FC) is a one layer coating on all air to glass surfaces.

- Multicoated (MC) has several coated layers on at least one-lens surface.

- Fully multicoated (FMC) has several coated layers on all air to glass surfaces.

Birding binoculars is one of the essential pieces of equipment for successful bird watching because they will not only bring your images to life, but allow you to catch a load of sightings that would otherwise be restricted with the naked eye.

 

 

 

source:  Compact Porro Binoculars，Monocular Telescope
Read more: http://www.nbbinoculars.com/blog/

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 Marine Binoculars With Compass

A rugged set of marine binoculars with compass are waterproof, shock-resistant, and fog proof to cope in all saltwater and freshwater conditions. Moreover, a built-in compass, often assembled within rubber armor, is able to offer a convenient instrument for determining direction at sea.

Features to a set of marine binoculars include glare reduction, increased contrast, and an individual focus setting option to eliminate a need to continue to refocus on long distance viewing. Compass view illuminates throughout the day via sunlight, and in low-light conditions, a backup light comes into effect.

These waterproof binoculars offer great viewing in bright and poor light (dawn, dusk, fog) conditions to locate buoys, spot markers, or navigate hazards or related safety concerns when cruising inlets, or open waters.

High-definition optics for use in a marine environment need a high quality build, often constructed with a metal outer shell, with compass encased in rubber, and finishing with a neoprene floatable strap. A design that allows an easy grip, in either large or small hands due to its substantial rubber armor, comfortable eyecups even for those wearing spectacles, and in view of its waterproof construction, will float if dropped overboard.

Accessories to assist in usage and maintenance include an anti-fog cloth, micro-fiber cleaning cloth, nylon holdall, cleaning tools, harness or neck strap, as well as a tripod mount holder.

In addition to operation at sea, a set of marine binoculars with built-in compass can also function equally as well for a hunter, hiker, bird watcher, or similar outdoor pursuit.

 

 

Key words:   Waterproof Binoculars ，binoculars

Read more: http://www.nbbinoculars.com/blog/

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 9 Important Considerations-Buying Binoculars

Here are 9 important considerations in determining which marine binocular to buy and 9 top binoculars at different price points:

1) Magnification: The first question in buying binoculars for use on your boat is what is the best magnification? A 7x50 binocular is well suited for use on a boat because it offers a great combination of magnification, brightness in low light and accommodates a use with movement caused by waves and weather. The 7 in the 7x50, refers to the magnification. This means that the image is magnified 7x which is the practical magnification limit for small boat. Magnification greater than this are great for land based usage like bird watching or hunting but provide too much magnification for marine usage because pitching and rocking.

The 7x50 is the most common magnification for marine use but you will also see 8x30 for use on larger boats or 7x30 binoculars. Increased magnification reduces the brightness of the image, so as magnification increases, binoculars require increasingly larger objective lenses to maintain brightness. The larger their size, the more light they can gather and the brighter the image in low light situations.

2) Waterproof binoculars: It is obvious that binoculars for your boat need to be waterproof. It is not just to protect them from elements like spray and rain. But the damp marine environment, combined with changes in temperature, causes interior lenses of non-waterproof binoculars to fog. Waterproof construction, with the interior o-ring sealed and filled or "charged" with dry nitrogen protects your binoculars from condensation damage or even if they if they fall overboard.

3) Lens coatings: Lens coatings help to reduce reflected light which will reduce brightness and crispness of the image. Binocular lenses are coated using one or more thin layers of chemicals, typically magnesium fluoride, which reduce internal reflection from 5% (with uncoated glass) to 1% or less. Given that the light passes thru numerous lenses and not just one, minimizing reflection is important.

Lens coatings vary in quality, If you look at the outside lens surfaces, quality lens coatings will appear as subtle tints of violet, blue or green. Heavily colored lenses in cheap glasses enable less light to be transmitted. Higher quality binoculars will include more layers, on more surfaces, to achieve their much better light transmission efficiency. Here are some of the alternatives you will find:

* Coated: one or more surfaces coated with a single layer. * Fully coated: all air-to-glass surfaces are single-layer coated. * Multi-coated: one or more surfaces coated with multiple layers. * Fully multi-coated: all air-to-glass surfaces are coated with multiple layers

4) Durability: Things on boats tend to get bumped around more than they do on shore. Binoculars are no exception. Less expensive boat binoculars tend to be lighter weight and more expensive binoculars a little on the heavier side. While light weight binoculars have their advantages on board from a comfort perspective, they might not stand up to the rigors of the marine environment as well as beefier binoculars.

5) Light Transmission: An important factor in binoculars for marine use is image brightness, especially in situations where you depend upon your binoculars most like during evenings, morning at night or in rain or fog. Less expensive binoculars will typically allow less light light entering the objective lenses to reach your eyes. Less expensive marine binoculars may allow only pass about 75% of the light. Higher end binoculars will allow ~90% of the light to pass and exceptional binoculars, such as top models from Steiner and Fujinon, pass between 93% to 97% of light to your eyes. The result is these binoculars make all objects appear brighter and are better for low light situations. Quality optics also make the image sharper. Inexpensive glasses may produce astigmatic images that are fuzzy at the edges. Superior glasses are sharp from edge to edge and are less fatiguing to the eyes when used for extended periods.

6) Prisms: Prisms come in two basic glass types, BK-7 and BAK-4. BK-7 uses boro-silicate glass and BAK-4 use a denser, finer barium crown glass, which more effectively prevents internal light from scattering and produces sharper images than BK-7. Binoculars made with BAK-4 glass tend to be more expensive but the quality of brightness does make a difference.

7) Focus: Marine binoculars may either have independent eyepiece focus or a center focus. The independent eyepiece focus compensates for the differences between eyes and for different distances. If your eyes focus differently, this is an important consideration. In center focus binoculars, one eyepiece adjusts to accommodate the difference between your eyes. A central focus knob on the top of the binocular then adjusts both sides for distance. The convenience and easy one handed use (so you can use the other hand to hold on!) is important and we tend to like the central focus binoculars for use on a boat.

8) Bearing compass: Some marine compasses come with built in bearing compasses. Some of the more expensive marine binoculars have bearing compasses that are accurate to ~1% while others are far more subject to the motion of the boat and are only accurate to ~5%. This feature helps to take bearings on distant objects to plot your position or to help other people find the object when you pass them the binoculars. Binoculars with a bearing compass are recommended for marine use.

9) Range finder: Binoculars with a rangefinder will help to calculate the angle from the base to the top of the object, if you know it's height. This enables you to accurately calculate your distance from that object.

 

 

 

Key words:   Waterproof Binoculars  , buying binoculars ,  binoculars 
Read more: http://www.nbbinoculars.com/blog/

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