Review Eschenbach Sektor F 8x25 Waterproof Compact Binoculars for Bird Watching
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| Model Name | Sektor |
| Brand | Eschenbach Optik |
| Color | Green |
| Material | Rubber |
| Water Resistance Level | Waterproof |
- BAK-4 PHASE CORRECTED PRISMS and FULL MULTI-COATING: While with other binoculars the images are dark or unclear, our binoculars provide sharper details and a brighter image with high color fidelity
- WATER PROOF & FOGPROOF: the sektor are nitrogen filled and the case is absolutely watertight, thus suitable for any kind of weather. Bring it with you when camping!
- HIGH POWER 8X42 SUPERZOOM binoculars: powerful, lightweight and foldable binoculars for birdwatching, safari, sport, hiking and every outdoor activity. Perfect for eagle watcher and mountain excursion
- EXCEPTIONALLY ROBUST and with anti-slip rubber coating. Ideal binoculars for adults and kids
- DEVELOPED IN GERMANY: ESCHENBACH’s story started over 100 years ago with an idea: precision. This is a guiding principle that we follow as a developer of quality optical products. We follow traditional values like experience, skill and vision
From the manufacturer
Eschenbach Optik
Full multi-layer coating
Phase correction
Compact
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Tips for selecting the right binocularssektor D 8x32 and 8x42 compact+ binoculars are suitable for all types of terrain and are practical to use. They offer the ideal combination of weight, size and vision comfort. Whether you’re on holiday or playing sport, if you prefer binoculars which are as light as possible, we recommend a pair of sektor binoculars with 8x magnification and the smallest objective lens, for example, the sektor F 8x25 compact+. If you want some great binoculars for the mountains that will get you as close as possible to the object you’re viewing, you should choose a sektor with 10x magnification. In poor light conditions (bad weather or twilight), we recommend a maximum 8x magnification and the largest possible objective diameter: such as the sektor D 8x56 B compact+. | Phase correctionPhase correction is featured exclusively on roof prisms. In the case of porro prisms, phase correction does not offer any advantages due to the position of the prisms. By means of complex technology, the phase shifts of the light rays are corrected in roof prisms. Phase correction improves the resolution and the contrast of the images reproduced. | Full multi-layer coatingThe sektor models have full multi-layer coating. In the case of full multi-layer coating, all lenses have a full surface anti-reflection coating. This technology allows the light to pass through the binoculars even in poor light conditions. Magnesium fluoride ('magenta full coating') is used for the standard coating. In the case of high quality binoculars such as those in the sektor range, the objective lens and eyepieces are also coated, as well as all lenses (combi-coating). | Using your binoculars correctlySet the dioptre to 0 (usually located on the right eyepiece or in rare cases on the left eyepiece or on the focus wheel). Adjust the width of the binoculars so that you can see something with both eyes. Close the right eye and adjust the sharpness for the left eye with the central focus wheel. Then close the left eye and adjust the sharpness for the right eye. |
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|---|---|---|---|---|---|---|
| sektor 8x32 | sektor 10x32 | sektor 8x42 | sektor 10x42 | sektor 8x56 | sektor 8x25 and 10x25 | |
| Magnification | 8 | 10 | 8 | 10 | 8 | 8 and 10 |
| Lens Ø (mm / in) | 32 / 1,26 | 32 / 1,26 | 42 / 1,65 | 42 / 1,65 | 56 / 2,20 | 25 / 0,98 |
| Near Point (m / ft) | 1 / 3,28 | 1 / 3,28 | 2 / 6,56 | 2 / 6,56 | 1,8 / 5,90 | 2,5 and 3 / 8,20 and 9,84 |
| Field Of View ft / 3280 ft | 377,30 | 321,52 | 390,42 | 285,43 | 374,02 | 469,16 and 374,02 |
| Height x Width x Depth (in) | 4,29 x 4,56 x 1,65 | 4,29 x 4,56 x 1,65 | 5,31 x 5,08 x 2,00 | 5,31 x 5,08 x 2,00 | 6,93 x 5,55 x 2,56 | 4,02 x 4,33 x 1,57 |
| Weight Without Bag (oz) | 13,72 | 13,89 | 21,16 | 21,80 | 36,61 | 10,44 and 10,30 |
| Nitrogen Filled | Yes | Yes | Yes | Yes | Yes | Yes |
| Watertight | Yes | Yes | Yes | Yes | Yes | Yes |
| Prisms | BaK-4, phase-corrected | BaK-4, phase-corrected | BaK-4, phase-corrected | BaK-4, phase-corrected | BaK-4, phase-corrected | BaK-4, phase-corrected |
| Coating | Full multi-coating | Full multi-coating | Full multi-coating | Full multi-coating | Full multi-coating | Full multi-coating |
Technical information
The key technical terms are briefly explained here.
Porro prisms: The 'conventional' prisms. Binoculars with Porro prisms are normally wider than comparable roof prism binoculars, but not as long. Owing to their widerspaced objective lenses, conventional Porro binoculars offer slightly better stereoscopic depth perception at short distances than roof prism equivalents.
Roof prisms: These are very compact and therefore allow the binoculars to be built very slim in form. A higher level of optical precision engineering is required than for Porro binoculars of comparable quality.
BK-7 prisms: These prisms made from boron crown glass are the standard for a good quality image.
BaK-4 prisms: These carefully machined high performance prisms made from barium crown glass provide even better resolution of details and very sharp, bright images with high colour fidelity.
SK15 prisms: These prisms are made from high quality SK15 glass. They minimise unwanted internal reflections and provide razor-sharp images with optimum contrast.
Magnification: The value gives the apparent magnification that the lens produces. With an 8x magnification the object appears 8 times closer to the viewer than in reality . Here, an object appears to be only 100 m away when in fact it is at a distance of 800 m.
Lens diameter: This is an important performance figure of binoculars since its size crucially determines the lightgathering power: The bigger the lens, the more light that reaches the eye and the brighter the image. The objective lens diameter is stated in mm.
Exit pupil/Brightness index/Twilight factor: These are arithmetic values that result from the ratio of magnification and lens diameter. Important in practice: an exit pupil between 2 and 3 mm is sufficient for use in daylight. Binoculars with an exit pupil of 5-7 mm should be chosen for difficult light conditions.
Field of view: Specifies the width of terrain seen through the binoculars at a distance of 1,000 m. The greater the field of view, the easier it is to view landscapes or moving objects, such as animals or competitors at sports events. Binoculars with wide-angle optics (with the designation: Ww) have a particularly wide field of view.
Near point: This number indicates the shortest distance at which objects can be seen sharply and without distortion. This number is important when buying binoculars for use in museums or outings where viewing is at short range.
Phase correction: This particularly elaborate application of special surface coatings to the prisms of roof prism binoculars is the ultimate for outstanding image quality.
Dielectric mirror coating: A dielectric mirror coating inside the prism system allows almost 100% reflection of the incident light and prevents the coatings from ageing. This coating ensures contours always remain distinct and clearly discernible even in poor light conditions or during the twilight hours.
Internal focusing: Focusing means adjusting the sharpness of an image. Only the lenses inside the binoculars are moved during internal focusing. This closed system prevents dust, air or moisture from being drawn in.
Waterproof: This term refers to a system of water repellent features on the casing and moveable parts that makes the binoculars resistant to pressured water.
Nitrogen filled: In contrast to air, nitrogen contains no residual moisture and so prevents the internal optics from misting up if the ambient temperature fluctuates.
Coating: Eschenbach binoculars have fully multi-coated optics. This means that all glass-to-air surfaces have an extremely thin anti-reflection coating to optimise 'light movement' through the binoculars to the eyes. A magnesium fluoride coating (magenta coating) is the standard. On some binoculars this is combined with multi-coating on one side of the lens and eyepiece to improve light transmission. For the highest vision requirements though, multi-coating is applied to all lens surfaces.
To ensure true-to-life, completely colour accurate images, Eschenbach applies a 'naturebright' coating to its farlux, bison and regatta binoculars.
Extra-low-dispersion (ED) glass: This expensive to produce glass compensates for chromatic aberration that normally occurs due to the differing dispersion of the light-beam colour components and is seen as colour fringing along edges and at transitions. ED glass ensures vivid true colour images, extremely rich in detail and with a sense of depth.
- Prisms
- Magnification
- Lens diameter
- Exit pupil/Brightness index/Twilight factor
- Field of view
- Near point
- Phase correction
- Dielectric mirror coating
- Internal focusing
- Waterproof
- Nitrogen filled
- Coating
- Extra-low-dispersion (ED) glass
Product Description
High performance compact binoculars for kids or for adults for an HD view
The sektor are the ideal binoculars for birdwatching or nature observation.
They combine true to-life images, durability and incredible lightness.
Their handy and functionnal design makes focusing child’s play and allows prolonged observation.
Well equipped with waterproof housing and nitrogen filling, the sektor binoculars can be used with sun glasses or in rainy weather.
These powerful inoculars are extremely robust and shock resistant.
The carrying strap, high quality case and dust protection caps offer even more value to this great pair of compact binoculars.
Technical features
- Magnification: 8x
- Lens Ø (mm): 25
- Exit pupil (mm): 3,1
- Geometric light intensity: 9,8
- Twilight factor: 14,1
- Eye relief min./max. (mm): 5/10
- Pupillary distance min./max. (mm): 35/75
- Near point (m): 2,5
- Field of view m / 1,000 m: 143
- Height x Width x Depth (mm): 102 x 110 x 40
- Weight without bag (g): 296
- Nitrogen filled: Yes
- Waterproof: Yes
- Eyepieces for spectacle wearers: Yes
- Prisms: Bak-4, phase-corrected
- Coating: Full multi-coating
What's in the box
Sektor F 8x25 binoculars; Carrying strap; High quality case; Practical dust protection caps
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Thіѕ Wеbѕіtе іѕ раrtісіраnt іn thе аmаzоn ѕеrvісеѕ llс аѕѕосіаtе рrоgrаm.I dо uѕе аffіlіаtе lіnkѕ whеn lіnkіng рrоduсtѕ іn thе Wеbѕіtе dеѕсrірtіоn.Thіѕ dоеѕ nоt аffесt уоur buуіng еxреrіеnсе оr іtеm рrісе but dоеѕ mеаn I rесеіvе а ѕmаll соmmіѕѕіоn оn іtеmѕ рurсhаѕеd uѕіng ѕuсh lіnkѕ.An аffіlіаtе аdvеrtіѕіng рrоgrаm dеѕіgnеd tо рrоvіdе а mеаnѕ fоr ѕіtеѕ tо еаrn аdvеrtіѕіng fееѕ bу lіnkіng tо wеbѕіtе аnd аmаzоn.соmWе аlѕо раrtісіраtеѕ іn аffіlіаtе рrоgrаmѕ wіth оthеr ѕіtеѕ. Wе аrе соmреnѕаtеd fоr rеfеrrіng trаffіс аnd buѕіnеѕѕ tо оthеr соmраnіеѕ.
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