Bresser Hunter 10x25 binocular Bresser binoculars opinie


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Bresser Hunter 10x25 binocular
 
 
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Bresser Hunter 10x25 binocular
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Bresser Hunter 10x25 is a pocket-sized binoculars for use during hiking, for field and natural observation. It also works well during sports events or concerts. Solidly made, with universal optical parameters. Comes with a cover.

Technical parameters

• Lens diameter: 25 mm
• Zoom: 10x
• Exit pupil: 2.5 mm
• Prisms: roof, BK-7
• Adjusting the focus: central + tuning in the eyepiece
• Field of view: 96 m / 1000 m / 5.5 °
• Anti-reflective layers: MC, blue
• Dimensions: 111 x 105 x 29 mm
• Weight: 195 g (with a 250 g package)

Usage

scenery
birds
shooting
sport
culture

Warranty

2 years














>> FREQUENTLY ASKED QUESTIONS <<

Question : What do the numbers 10x25 / 10x50 / 7x50 / 20x60 / 20x80 / ••8-20x50 / 10-30x50 given with the name of the binoculars?

Answer: The first number in the record 7x50 means the angular magnification (sevenfold), and the second - the diameter of the lenses expressed in millimeters. A record like 8-20x50 or 10-30x50 means that we're dealing with zoom-binoculars, which is equipped with a smooth change of magnification system, from 8 to 20 times or 10 to 30 times. 50 means, of course, the lens diameter.

Question : Is there a case and a strap to hang binoculars around your neck?

Answer: Yes, each binoculars has a carrying case and a neck strap, usually also caps for lenses and glasses, unless it is clearly written that it does not have one.

Question : What effect does the magnification and the diameter of the lenses have on the image of the binoculars?

Answer: The greater the magnification, the greater the perceptibility of details, but also the smaller the surface brightness of the objects. Therefore, if you are looking for hunting binoculars, the magnification should be between 7 and 10x, for birds and landscapes we recommend binoculars with a magnification of between 7 and 12x, while for observing aircraft you usually choose binoculars with large magnifications, on the order of 15-20x or zoom binoculars .
In turn, the larger the lens diameter, the higher the resolution of the binoculars and the brighter the image, but also the greater weight and size of the binoculars, sometimes requiring a photographic tripod.

Question : I still do not know what binoculars to decide, I want to buy a universal pair of binoculars with good parameters to "see a lot". How to choose?

Answer: The most universal parameters of the binoculars are 10x50 and we recommend them - they are characterized by good visibility and, at the same time, brightness, a large field of view and do not require a tripod.

Question : Is it better to choose binoculars with constant magnification or binoculars with zoom?

Answer: Zoom binoculars are equipped with an additional optical system that allows you to change the magnification. In optics often "less is more". Each additional optical system, which is not the corrector of one of the optical defects, always has a negative effect on the image quality. It's like with photographic lenses - the most valued ones are fixed, not those with variable focal length. On the other hand, binoculars with zoom are more versatile, because nobody wears 2-3 binoculars with different magnifications.

Question : Does this binocular have glass lenses or plastic lenses?

Answer: All conventional binoculars have the whole glass optics, since only glass can be polished and polished to the right shape, while polymers ("plastics") have the accuracy of limited form accuracy.

Question : You write in the specification about antireflection / anti-reflective layers, what is it? Are the anti-reflective layers so that I can not see, that is, the binoculars do not give "reflections", eg from the Sun?

Answer: Anti-reflective layers, also called anti-reflective layers, serve to increase the efficiency of the optical system, for example, binoculars, but basically any other device. Optical efficiency defines how many percent of the beam entering the optical system goes through the system. It is necessary to know that when light falls on the border of two optical centers, eg glass / air, a certain fraction of the beam is reflected. From everyday experience, we know that you can look through the window - just for that reason. In order to minimize losses, anti-reflective layers are used, thanks to which more light passes through the boundaries of the centers, and less reflects.
Antireflective layers can be of various types and types, often they are the price of the best binoculars, whose total efficiency can reach up to 95%.
It is worth knowing that anti-reflective layers are applied to optical surfaces of microscope elements, telescopes, observation telescopes, sights, photographic lenses and night vision devices for the same purpose as for binoculars.

Question : When describing binoculars, you write about glass of prisms, BK7 and BaK-4, what's the point?

Answer: Most optical prisms are made of glass BK-7 (borosilicate) or BaK-4 (bar cron). BAK-4 is a glass of higher quality and gives brighter and sharper images. It is also more expensive glass, usually used in high-end binoculars. It is worth paying attention to, especially if you are looking for binoculars for hunting and astronomical applications.

Question : In the description I did not find some parameters of binoculars, which I found on other websites. Can I find out what binoculars have brightness and twilight efficiency?

Answer: For the sake of clarity, we usually do not provide secondary parameters that do not provide additional information than those provided. Nevertheless, these parameters can be calculated independently:
exit pupil is the area in the eyepiece in which the image is created; The diameter of the exit pupil is equal to the ratio of the lens diameter by magnification, eg for 7x50 binoculars it is 50/7 = 7mm, for 10x50 binoculars: 50/10 = 5mm, and for 20x60 binoculars: 60/20 = 3mm; this parameter is usually given in the description

relative brightness is the square of the exit pupil (exit vista: see above); for 10x50 binoculars, the output is 5, that is, the brightness is 25, similarly for binoculars 7x50, the brightness is 50, for binoculars 20x60, the brightness is 9, etc.

twilight factor is another secondary parameter that nocturnal people like to pay attention to; it is equal to the square root of the product of the magnification and the diameter of the lenses; with a simple calculator, we can quickly calculate this parameter:
- for 8x40 binoculars: 17.9
- for 7x50 binoculars: 18.7
- for 10x50 binoculars: 22.4
- for 20x60 binoculars: 24.5

Question : I am looking for binoculars for astronomy, which one to choose?

Answer: You can not give a simple and short answer to this question. Astronomical binoculars are simply very good binoculars. This means very good correction of optical defects (mainly chromatic aberration and distortion at the edges) and high optical efficiency. For these reasons, we do not recommend binoculars with zoom for astronomy, except maybe a few exceptions. Astronomical binoculars do not have to have a large magnification - from this there is a telescope to observe at high magnifications. The binoculars - usually - should be handy so that they can always be taken with us when we can not take a telescope with us - then we choose binoculars 7x50, 10x50 or 15x70. Usually, because large binoculars dedicated to astronomy type 20x80, 22x100 are a separate class of optical instruments requiring observation from a tripod.
For the beginning observer, astronomical binoculars are used to explore the sky, the colors of the stars, and search for the deepest objects of the deep sky. For an advanced observer, a large pair of binoculars is a very efficient device for observing comets, variable stars, nebulae, star clusters, galaxies.

Question : I am looking for lornetki na jacht / kajaku / na ryb / na morze, which one to choose?

Answer: The binoculars for water must be waterproof, filled with nitrogen and should have a 7-fold magnification, since only this magnification guarantees a clear and stable image.

Question : I am looking for binoculars for bird watching, should I purchase high magnification binoculars (16x, 20x or binoculars with zoom)?

Answer: For observation of birds, we usually recommend binoculars with a small or medium fixed magnification, i.e. from 7 to 12 times. The optimal set for a bird watcher is a fixed-magnification binocular and an observation telescope with a zoom on a photographic stand.


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