Optical Technology:

With the aim to provide, the user with sharp images with high quality is the make of this optics. It offers a wide field of view and the high eye point that does not stress the viewing eyes. Just not the usual Achromat lens, it comes with the pominar apochromat type of crystal lens to satisfy the seeker of high quality performance.

The Physical Characteristics:

Made with the grey colour housing and the robust construction it weighs a little more than the normal ones with 6.16 kg. However, when you consider the binocular doing the job of the huge telescope it is justified. The housing made of die-cast aluminium for its durability can withstand for hard usage. The dimension that makes it is 16.9” x 9.4” x 5.9” relating to the length, width and height of the device.

Magnification and Aperture:

These two factors determine the application and the ability of the binocular. The one comes with the magnification power of 32x, while with the use of the eyepiece the magnification can be enhanced. Kowa provides with the interchangeable 50x and 21x eyepiece to facilitate the deeper and far off observation. One another technical detail is the objective lens diameter that measures 82mm. This is quite big to transform the images brighter and clearer, can also support the long distance observation.

Focus system:

The IF system that denotes the individual focus system permits the user to set each of the ocular individually for more accurate observation. This helps in detailed view of the viewing objects.

Other product details:

Kowa HighLander 32×82mm Astronomical Binocular is been designed as water proofed technology. The housing is waterproof and it has dry nitrogen gas fill that prevents the lens from fogging. This takes the user for long hours of observation even in the extreme weather conditions. Available in this Binocular is the hood for the eyepiece that prevents unnecessary light and the raindrops from disturbing the observation. Offered with this model a set up mount that works easily as you have to just push the eyepiece and pull them out if it has to be detached.

Warranty:

Warranty for the lifetime of the product given by the manufacturer, takes Kowa High Lander 32×82mm Grey colour Binocular a step higher.

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Kowa HighLander 32×82mm Binocular - Technical Specification Table

Hawke Optics, the well-experienced brand that offers many sports optics consists of binoculars as its major segment. Having been catagorised with many segments based on its utility it captures the market that look for professional device. Hawke Nature-Trek 10×50 Binocular that is been reviewed belongs to its nature-trek series that is the perfect match for the travelers and nature enthusiasts. The features are been focused that suits using the product in any weather conditions.

Physical Characteristics:

Although not the one that is very compact, it does serve the purpose for the travelers. It weights 812 grams and with its rich technical, the weight does not seem as a compromise. The body comes with the complete shock resistant polycarbonate material that gives it a robust structure. The casing is comparatively on the lightweight side. They are fully nitrogen purged that makes it both waterproof and the fog proofed device. The rubber armouring offers a high grip and so is the waterproof body. All put together the high quality casing and the proof against water and fog keeps the internal technology safe and in place even when received any hits or drops.

Perfect Optics:

Having been constructed with the Roof BAK4 prism and the lens coating is fully multi-coated the high quality image can be obtained. With the inner focus optical design it transforms stunning optical images. The fully multi coated optics and the Prism quality in this combination produces clearer, crispier and stunning images with high resolution.

Magnification and Aperture:

The magnification ability of Hawke Nature-Trek 10×50 Roof BAK4 Prism Binocular is 10x which denotes that the viewing image looks 10 times bigger than its size. The objective lens of this model measures 50mm in diameter which is been said to be the aperture of the binocular. This works best for the light gathering and this is the highest aperture offered by the brand Hawke in this series. The exit pupil that is been present in the center of the objective lens also works along to produce brighter and clearer images.

Focus system:

With the central focus system, Hawke Nature-Trek 10×50 Water Proof and Fog Proof Binocular makes the operation simple and it does offer a clear focus of the viewing object. The effortless focus and the impressive depth of field makes handling simple and so is that it excites the users; the dioptre adjustment is another smooth operation that makes easy aliening for viewing the desired objects. Well, the field of view at the distance of 100 yards is 93 metres and with respect to the close focus system, it allows a close focus of 2.5m that is quite good when looking through to view the moving objects.

Eyecups and the eye relief:

Make with the twist up eyecups that has adjustable diopter serves the best for the clear focus. The eye relief is quite impressive with 17.5, which is on the higher side. It makes easy for even the spectacle wearers to use this device.

Included Accessories and the Warranty:

Comfort neck straps and the carry case are the included accessories of this model. Hawke offers a worldwide warranty for this product.

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Hawke Nature Trek 10×50 Binocular - Technical Specification Table

Prism:

Designed with the porro prism that is one of the popular technology of magnification, it offers the device to come into the compactness and makes handling easy.

Magnification:

Herewith is the capacity of magnifying the objects to 7 times, which means that the viewing objects appear to the 7 times bigger than its original size. Most of you might think that this ability will not be sufficient but the maker of Zeiss Marine 7×50 Porro Prism Binocular combines it with rich technical making it possible to serve the purpose.

Aperture:

The embedded objective lens of this device measures 50mm, while such huge aperture can be found in models of higher magnification. Zeiss gives the advantage for this Binocular to enjoy the big objective lens. This transforms better light to the view through the device. Its light gathering is high comparatively and hence the far off objects can be discussed in details even after the observation of short span.

Physical Characteristics:

Like most of the models available in the market this too is been attired in black colour. The housing comes with the rubber armouring that is highly shock absorbent. It measures 136mm length x 215mm width and weighs 1200 grams. Designed with the individual eyepiece focusing and they are made of rubber that permits to view with the eye glasses put on. Doubtlessly, being a product for the marine activities it is been made to be waterproof with the nitrogen gas purged.

The Image Brightness:

Not just the aperture that determines the brightness of the viewing objects but there are quite a few technical aspects that determine to product brighter and clearer vision of the viewing objects. One similar to the aperture is the exit pupil that is been found in the center of the objective lens in a circle. It measures 7.1mm in diameter and the larger is the size the brighter will be the images. This product has a competitive exit pupil. The geometric brightness accounted is 51 and the twilight factor is 18.7.

Focus Distance:

This model can be viewed with the required distance and the field of view at the distance of 1000m is 130m, while the apparent field of view is 52 degree. This is quite justifying when on move and the observe the moving objects. The close focus distance is 6.5m where by even when the moving objects comes to a close distance it can be observed with the same device. Zeiss Marine 7×50 Waterproof / Shock Proof Binocular gives an eye distance adjustment range of 53mm to 78mm. another interesting factor determined is the eye relief that is 18mm, this makes it comfortable for even the spectacle wearers enjoy the binocular view without the feel of disturbance.

Included parts and accessories:

This Binocular comes with the Eyepiece cap, neoprene carrying strap with air cells padding and the objective lens cap as the package contents.

Zeiss 7×50 GA T Marine Binocular - Technical Specifications, Features

Model: Among the many series that is been categorised by the brand for the use of different purpose makes it indispensable to note that Pentax 8×33 DCF XP Roof Prism Binocular belongs to the series that specializes in few features like the water and fog proof, roof prism, compact in construction and light in weight.

Type: Pentax 8×33 DCF XP Water Proof / Fog Proof Binocular is been designed with the roof prism the type that offers compact dimension of 107 x 121 x 51 together with the weight of just 500 grams. It can easily slide in to the pockets or attached to the belt without the feel of its weight. In most cases it surprises many that this little device can do wonder by magnifying the required objects. With the distinguished brightness and the high contrast levels the lens stands to be appreciated, this is possible with the multi-coated lens and the phase corrected roof prism.

Magnification and Aperture: The ability of magnifying is about 8 times of its original size and the objective lens embedded measure 33mm in diameter. This is quite obvious that the viewing in the field of naturists, wild lifers, and birders can pick it without a second thought. The aperture along with the exit pupil that measures 4.1mm gives the wholesome light gathering making the objects brighter than the models with less aperture and exit pupil. Supported with the relative brightness that is been measured to be 17 makes it go a complete way.

Field of view: It gives a 114m field of view at the distance of 1000m and the close focus that can be obtained is 1.5m. Pentax 8×33 DCF XP Compact Binocular can be complimented for its close focus as this forms the group with best close focus device. Hence, the nature observers, the insect viewing, or the butterflies can give an outstanding performance.

Added specifies: It consists of a dioptre adjustment that ranges as plus or minus 4 dpt. The eye distance adjustment ranges from 58mm to 74mm that is quite normal among the models of this type. It offers a long eye relief of 20mm that is sure to comfort the eyeglass wearers. The dioptre adjustment is with the click stop that is convenient for the user and can eliminate the unintentional changes. Since it has the nitrogen fill and is been rubber armoured it sets proofed from both water and fog. Using this device even in the extreme of weather conditions is possible.

Pentax 8×33 DCF XP  Roof Prism Binocular - Technical Specification Table

Physical Characteristics: Pentax 10×42 DCF HR II Waterproof Binocular comes with the black body colour with the rubber armouring. The weight and the dimension are 835 grams and 173 x 129 x 55 mm relating to the height, width and the depth of the binocular. It is been designed in a unique shape that allows the user to hold in firmly without the let down even in the extreme weather conditions. The diopter offers an adjustment of +/- 4dpt. This works with a click to intimate the user the settings. The eye distance adjustment range works between 58mm to 72mm.

Magnification: The magnification ability of Pentax 10×42 DCF HR II Roof Prism Binocular is 10x, this allows the user to view the objects magnified 10 times of  its original size. Observing nature with this magnification power is good enough to impress the user. Hence, it suits best for the naturist, birders, hikers and the mountaineers.

Objective lens: The embedded objective lens measures 42mm, it goes well for its light gathering ability. The user is able to view even in the dim lights and together with the exit pupil that measures 4.2mm is quite big that offers a sure vision during the dawn and the dusk. Supported by the relative brightness that measure 17.6 that stands competitive among the models of this specification.

Lens: Made with Aspheric hybrid lenses with phase-coated prism and the fully coated lens offers vision with clarity, brightness and without the usual glare. Enjoying the nature for longer hours than usual is possible.

Field of view and close focus: With the central focus system and the field of view at the 1000m is been said to be 105mm. The close focus is about 4m and it makes it complete for the user while viewing the fast moving observation like the sports or the wild life.

Verdict: This is a highly durable model and the nitrogen purged makes it water proofed. It offers a wide range of application and impresses the user with its lightweight too. A perfect for all-even during the travel times.

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Pentax 10×42 DCF HR II  - Technical Specifications, Features

Talking about the industry leaders, ‘Bushnell’ gives its stand since 5 decades. With the mission of developing the state of art products in the optical segment, the brand puts its consistent efforts to let its customers enjoy the outdoor as close as they desire. Among with wide range of products, Binocular seems to be the major contribution which again has been segmented to suit the various activities like the sports, nature, hunting, fishing, birding and the general observations. This Binocular that is been reviewed belongs to the ‘Powerview’ category that specializes to view in the dim light conditions.

Type: Bushnell 10×32mm FRP PowerView Binocular has a Roof prism construction that goes a very handy manner. The prism embedded belongs to the BK-7 type. This Binocular is a compact model that is light in weight. When compared to the Elite series of this brand this model has an edge over with its weight and the compactness. This device thus is been best suited for the hikers and the travelers.

Magnification and the Aperture: The magnification of 10 times makes this Binocular and is been defined with the objective lens that measures 32mm in diameter. The user is been able to obtain the sharp focus of the far off objects and many a time it wins the compliment of the serious ornithologists.

Focus: With the central focus system, the required adjustments can be easily set with the simple operation. The field of view at the distance of 1000m  is 265m. The close focus can be obtained as close as 25 feet or 7.6m. This is not an impressive ability when compared to the Elite models of this brand. Since the very close observation cannot be derived, it stands not suitable for the fast moving objects.

Exit pupil: The exit pupil that is present in the center of the objective lens measures a diameter of 3.2mm. Much similar to the aperture this also functions in light gathering to make the images look brighter and as original. This model has an average level of exit pupil and proves good for the dim light observations. Hence, the device is been rated to be suitable for the observation during the dawn and the dusk.

Ergonomics: The physical characteristics are a comfortable handling, as it weighs just 350 grams. The body has a rubber armouring protecting it from the drops and bumps. The lens of Bushnell  PowerView 10×32mm Roof Prism Binocular are fully coated and it offers a glare-less observation. This Binocular however does not feature with tripod compatibility and are not either water or fog proofed. The eye-cups are been designed with the fold down type that is one of the simple forms.

The application of Bushnell 10×32mm 131032 Rubber Armouring Binocular is wide that includes the general observation and it is sure to impress its customers with its power inside its compact black colour device.

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Bushnell 131032 Powerview Binocular - Technical Specification Table

Physical Characteristics: Celestron UpClose 20×50 Porro Binocular comes with the black colour body that has rubber armouring. These models under the upclose series consists of large center focus knob that offers smooth and accurate focusing. It does come with the tripod adapter thread that makes it compatible with the tripod operations. The eyepiece and the objective lens are also perfect in its quality and performance. This 878.84 grams weighing binocular is definitely easy to carry and is a handy model. All the power of magnification can go along with the user for any time access without the burden of its weight.

Prism type and optical design: This Celestron Binocular comes with the Porro Prism that are been designed with the BK-7 optics. This type is highly economical and proves to be effective, it helps in transmitting the invert images in the right side up with the perfect light gathering and produces sharp and well-defined images.

Magnification and Aperture: Well known is the fact that the degree of magnification and the enlarged vision of the far off objects purely depends on the magnification ability of the device. Celestron UpClose 20×50 Fully Coated Optics Binocular offers a large magnification of 20 times to the naked eyes. This is quiet big that it can offer a professional use for many fields that include birding, sports, concert etc. Well, when the aperture is considered it measures 50mm. The objective lens diameter is quite large that it performs in better light gathering ability making the objects clearer and hence it suits best for the activities like scenic observation and sports.

Focus: With the central focus system, it offers a linear field of view at the distance of 1000 yards as 168 feet or 51.21m. In case of the close focus, it is 10.97m or 36 feet. The close focus is however not impressive as the models with the lower technical seem to offer better close focus.

Other technical aspects: Much similar to the aperture is the exit pupil that is been found in the center of the objective lens diameter. This again functions to gather better light and it measures 2.5mm. The eye relief of Celestron UpClose 20×50 Waterproof Binocular is 7 mm that is low to comfort the spectacle wearers.

Warranty: Celestron offers a no-fault lifetime warranty for this binocular.

Verdict: This  Porro Prism Binocular model is best suited for the applications like Sporting events, Birding, wildlife observation, hiking, scenic nature walk and concerts. The weather shield that makes it suitable for the extreme weather conditions is an impressive one. It is not very comfortable for the eyeglass wearers. Sometimes focusing may be time consuming and difficult to fix but it finally gets to go positive.

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Celestron UpClose 20×50 Porro Binocular 71144 - Technical Specification Table

The company founded in 1957 by being specialised in the import and distribution of binoculars. In due course, they began to innovate and develop the optical products. The current scenario is that the brand today has become one of the leading supplies of these products in Europe and around the world.

Model: Corvette 10×50 Porro Prism Binocular

This binocular belongs to the ‘Corvette Series’ of the brand. It comes with the superior optics and designed to suit general observation that includes birding, wild life, sports and nature. The comfort offered to the user is by way of long eye relief, smooth focus control and the twist up eye cups.

Type and Size: Bresser Corvette 10×50 Binocular belongs to the Porro Prism type that comes with the high definition optics. The BAK-4 material of glass is been used for its construction and comes with the fully multi coating. It offers razor sharp images with the high contrast images. The size of the device is with the dimension of 190 x 70 x 180 mm. It weighs 930 grams that gives a sturdy finish. However, its dimension and weight may not sound handy and would not suit for travelers, hikers and mountaineers when compared to the compact models.

Magnification and Aperture: The magnification of 10x brings the images 10 times closer than it is actually present. The objective lens diameter of 50mm is quite large enough to obtain the require light for the image transmission. The images are been transformed with better light effect that those which are been view with low aperture. Shortly, this defines the light gathering ability of the device and the higher the value the brighter would be the images.

Focus: With the central focus system, operating the device is much easier and simpler. It offers a close focus of 8m that is the minimum distance the binocular can focus. This helps when the user is viewing the moving objects like the birds or the sports activities. In case of the field of view at 1000m it is 114m.

Exit pupil: The fact is that the exit pupil present in the objective lens should also be big to deliver brighter and clearer vision of the targeted objects. The exit pupil of Bresser Corvette 10×50 Waterproof Binocular (1461050) measure 5mm.

Other Benefits: The twilight rate is been rated to be 22.36, it produces brighter images when it is been combined with the aperture of this level. This device is been made waterproof and also consists of rubber armouring. The waterproof is been tested with the immersion test for about 1minute and 60 seconds. Available in this Binocular is the tripod bush that allows to be set up with the tripod for longer hours of viewing. Further, the eyecups of this Binocular are fully adjustable and it works as the twist up type for both the comfort of the user and the protection of the glass.

Package Contents: Bresser offers Bresser Corvette 10×50 Birding, Wildlife Binocular with the package contents of a case, straps and lens cloth.

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Bresser 1461050 10×50 Binocular - Technical Specification Table

‘Pentax’, is the maker of this product. Pentax U.K the established manufacturer is been known to be the member company of ‘HOYA Corporation’. Its wide portfolio of products segregated in different segments enhances the name familiarity among its customers. Binoculars are one of its large markets, there are many types and models made available that cater the need of people of different uses.

Model: 12×50 PCF P II Binocular

This models paves way for the people who desire for attraction. Although common in structure, it has an exclusive and attractive finish. This comes as the full sized waterproof model that is been made available under the ‘PCF Series’ of the brand.

Physical appearance: With the black colour body, that is been made of rubber armouring makes it waterproof. At the first look, it promises its robustness and sturdy structure. The said model has the dimension of 178 x 183 x 79 mm that relates to the height, width and depth respectively.

Optical design: Pentax 12×50 PCF P II belongs to the Porro Prism type that uses the lens technology in its construction. It offers a central focusing system that has a built-in focusing arm. It can be adjusted at ease by the user until the right focus is been obtained.

Added comforts: Apart from the technical aspect, there are a many features that stand to attract the user.

• Lens coating - The embedded lens comes with fully multi-coated one that is free from glare during the observation. It also offers brighter and clearer images that make it suitable for wide range of uses that use it for different applications.
• Eye width adjustment – To make Pentax 12×50 PCF P II Porro Prism  Binocular suitable for all age groups without eliminating any individual, it offer a wide eye width adjustment to range from 57mm to 72mm.
• Waterproof – Made to be waterproof of 1m depth of water, which is been possible because of its nitrogen fill inside the device. However, it has to be noted that they are not suitable for the under water use and cannot be submerged in water. It is only a weather protection that can withstand extreme weather conditions.
• Diopter adjustment range – Made available is the built in diopter adjustment that functions with the click type and the range of its adjustment is ± 4 m-1.
• Eye relief – In order to comfort the spectacle eyes, the stated eye relief is 20mm. It is on the higher side and makes this model suitable for them. The strain is less here and hence the observation time can be extended as desired.

Technical details: The technical aspects of this model is been catagorised with the different aspects and is been discussed in detail.

• Aperture: The so-called objective lens diameter of this model is 50mm. This makes viewing interesting as it gathers a reasonable amount of light and makes it look brighter that the original. The relative brightness determined here is 17.4.
• Magnification: All the efforts made to observe the images are based on its power of magnification. This model is been capable of magnifying the images 12 times than its original size.
• Field of view: At the distance of 1000m the images brought into vision is 73m and in case of the close focus it is 5.5m, which is the shortest view Pentax 12×50 PCF P II WaterProof Binocular can provide.
• Exit pupil: Deriving the brightness of images is also possible with the exit pupil; this model states the diameter of exit pupil as 4.2mm.

Accessories: Pentax offers during the purchase of Pentax 12×50 PCF P II Waterproof Binocular the various accessories that come without the need to pay any extra. They are Objective lens caps, rain shielding eyepiece caps, case and neck strap.

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Pentax 12×50 PCF P II Porro Prism Binocular - Specification Details

Brand: Olympus

At the forefront they are a vision realiser, who manufacturers many professional products as the imaging solutions. They stand for their digital technology, outstanding design and uncompromised quality. In the aspect of binoculars they categories the products as ‘professional and leisure’ type. Olympus 10×21 DPC I Silver Binocular forms the group with the leisure type under which it is been categorised into nature, urban, culture and sports. This belongs to the sports division that the compact and easy to carry models.

Model: 10×21 DPC I Silver Binocular

At the outset, Olympus brings out the compactness, lightweight and stylish finish in this model. It works on the Porro prism technology and its technical makes it suitable for general outdoor, travel and bright light observation. However, it is suitable only for the day light and may not perform the same in dim light conditions.

Magnification: It is capable of magnifying the objects to 10 times its original size. The ability is better than its previous model with ‘8×21’ definition. Observing nature with this magnification is a great experience. Even if the too far details are not clear, the overall closeness obtained with this binocular makes it interesting.

Aperture / lens: The objective lens diameter of Olympus 10×21 DPC I Compact Binocular measures 21mm good enough for the day light observers. Added to this is the lens that features with anti-reflective coating that reduces the glare and hence produces clear viewing of the objects. It also comes with the UV ray protection to protect the viewing eye. All together the user is been offered a carefree viewing for longer time.

Design and Structure: Making it suitable for travel is the weight that counts and is just 170 grams. The dimension of Olympus 10×21 DPC I Travel Binocular is   107 x 82 x 41 mm with respect to width, height and depth. The body finish is silver and the eyepiece is in black colour finish. On the whole, the compact and contemporary design makes it appealing even to the stub born hearts.

Brightness factors: The various technical aspects that determine to produce brighter images are the aperture and the exit pupil. The exit pupil the one that is present in the center for the objective lens measure 2.6mm in diameter. This is big enough for the small models and makes sure to grab more light for the images. The relative brightness is 6.9 for this model.

Viewing range: For such devices, the viewing range is another consideration of the user. The field of view at the distance of 1000m is 112m and close focus is been limited to 2.2m. This is quite good for observing moving objects like wildlife and birding. The apparent field of view is been stated as 51.2 degrees.

Convenience: As discussed earlier the UV lens is a comfort addition. It consists of a built-in dioptric correction that adjust to the user eyesight. The focus system being central, present is a knob that can be adjusted easily for the accurate focusing. In case of the diopter adjustment, it ranges over ±2 m-1. The eye interval adjustment is also present and it ranges as 60 – 70mm. With the stated eye relief of 11mm, it makes possible for the spectacle wearer to view to a certain extend.

Package contents: Olympus offers the following on purchase; they are Binocular with case, neck strap and protective lens cover.

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Olympus 10×21 DPC I Travel/Observation Binocular - Specification Details