Binocular Reviews

131032 - 10×32mm, Fully Coated Optics, Roof Prism Binocular from Bushnell

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

Model Overview: This UpClose 20×50 Porro Binocular (71144) is from the experienced maker of optical products and are professionals in magnifying every thing on earth and sky. Introduced under the series of ‘Upclose’ the brand ensures advanced challenges at the economically price tag. Under this, series consist of five models of which one comes with the zoom functions. With all the benefits of upgraded construction and feature rich, these models take the advantage of enhanced durability and stylish appearance. The following is the review of this model.

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

Brand: Bresser Optics

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

PCF P II - 12x magnification, Waterproof, All weather Binocular from Pentax

‘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

DPC I - Silver Colour, Compact Size, UV ray protection Binocular from Olympus

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