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by Heider
Price $39.90
The professional black 1000 meters distance monoculars, recently released by Heider, are specially designed for amateur and expert users'needs. Heider CD2's special alloy metal body features the black anodize light reflection.

These innovative monoculars designed for amateur and professional users, police, military and security personnel are easy to carry in your bag or pocket.

Heider CD2 is the apple of hunters' eye and offers a more visible distance of the hunt. Especially the short-range hunting is a nice example of it and this makes Heider CD2's difference. This unique and high-quality monoculars featuring a fast and practical focus, meet users' needs in the fastest and most practical way. Besides, taking into account that even the smallest reflection may distract the hunter, the whole body is designed in black color.

Heider CD2 offers maximum optical performance. The combination of the quick focus and the 10x21 magnifying power provides the comfort of largest field of vision for its user.

These German designed mini monoculars having a super long distance visibility may also be used for short distances as much as the challenging long distance ranges. They offer almost an unlimited usage especially for travel, vacation, domestic use, sports events and emergencies. These folding mini monoculars featuring an extremely compact and light design are considered as irreplaceable by the hunters and the nature watchers since they are introduced into the market.

The use of the Porro prizms featuring high translucency, makes Heider CD2 possible to have the small and compact design for the 10x21 magnifying performance. 21 millimeters lens diameter, the innovative optical system and the high-quality coating provides high contrast natural colored visibility even when the light is insufficient. This Heider patented product may be adjusted starting from 360° degrees close focus up to the infinity thanks to its useful and Quick Close Focusing (QCF) feature by turning its focusing steer against the object glass placed on the front of the device.

Heider CD2, remarkable with its black durable metal body and its coating for sure grip, provides also a waterproof and dust proof use thanks to its special impermeability technology down to 5 meters depth. The product has extended eye relief distance to accommodate eyeglass wearers which enables a wide look angle. The turning adaptor may easily be adjusted upon users' special needs. The product is supplied with its special case and strap.

• Magnifying Power: 10x21
• Front Lens Diameter: 0.98 in. / 25 mm
• Exit Pupil Diameter: 0.12 in / 3.1 mm
• Eye Relief: 0.47 in. / 12 mm
• Field of View: 96 meters / 1000 meters (6.5°)
• Focus Type: Center Focus
• Prizm Type: Monoculars porro prizms
• Relative Radiance: 9,6
• Working Temperature: 14° up to 113° F
• Waterproof: 16.4 ft / 5 m
• Length x Width x Depth: 48 mm x 70 mm x 22 mm
• Design: Heider (Allemand)
• Lens Coating: Phase Coating. Fully Multi Coating


• Twilight Factor: 14,1
• Angular Field of View: 6,5
• Coating Material: Rubber Coating
• Light Intensity: 9,6
• Color: Black
• Splash Protection


• 1 10x21 Mini Folding monoculars
• 1 Carrier Bag
• 1 Lens Cleaning Cloth


What is a pair of Binoculars?
Binoculars are an optical device which lets us to see better the further objects by magnifying them. Invented by an Dutch optician named Adrian Metaus (1571 – 1635) and improved by the famous Italian scientist and savant Galieo Galilei (1564 – 1642) a year later. It is first made by taking advantage of the convergent lenses which zoom in and magnify. There are two basic types:

Sky Binoculars:
Sky binoculars used in researching the star universe, are composed of a lens system containing two convergent lenses (object glass, ocular) so their distance between them is alterable. The object glass is a convergent lens having bigger focal distance which gives a better view. The view of a star at a infinite distance is provided inverted, small and real on the focal plane. On the other hand the ocular is a magnifying glass which lets us to examine this small, real and inverted view of the objective glass. This second view is artificial, big and inverted too.

Ground Binoculars:
The sky binoculars may not be used on the ground as the view provided by them is inverted. This defect of the sky binoculars is sorted out with a new convergent lens called as leveler added on the ground binoculars. The objective glass drops the image of the further objects on the focal plane as in the sky binoculars. This inverted image is reverted thanks to the leveler convergent lens and it appears on the lens which examines this image as a magnifier.

Due to its huge size of the ground binoculars which let us have this reverted image may not be used everywhere as they are inconveniently tall. Therefore the Galileo binoculars are used instead. A divergent lens is used as an ocular on the Galileo binoculars in order to revert the image.

The sky binoculars are used in the observatories as observation binoculars. While the ground binoculars are mostly used on the ships as static binoculars to watch the further objects at a long distance. As to the Galileo binoculars are used in the theaters or sport events, etc. The modified and handier version of the ground binoculars, the Galileo binoculars might have another leveler composed of two prisms instead of the regular leveler lens and this version is called as Prism binoculars. The Prism binoculars, invented at 1850 by an artillery officer named Porro, constitute the version, which are most commonly used nowadays.

Binoculars are basically the optical device composed of two identical telescopes oriented next to each other in order to show the same point and placed to create the image in one eye of their users to give a more developed depth and distance feeling comparing to the single lens telescopes. The binoculars made use of observing the objects either on the ground or up on the sky, are used in different ways thanks to their portable and light bodies.

Magnifying Power
For a device which basically serves to zoom the further objects in hard to see with naked eye, the magnifying power is one of the essential optical features. The very first concept that the amateurs who are interested in the binoculars topic will come across, is the indication placed on every binoculars models such as 8x40 or 7x50, etc. There are also some other kind of binoculars able to zoom in; 8-24x50 – 12-60x70 (Only Soligor).

This indication which will often come across in the binoculars world, represents two important parameters: the first number is used to indicate the magnifying power and the second one the lens aperture. For example a pair of binoculars with 7x50 indication features a 7 times magnifying power and 50mm of lens aperture. While a pair of binoculars with12-60x70 indication, are able to zoom in with a magnifying power starting from 12 times up to 60 times. In this case 1000 mt/83mt will be 1000 mt/16 mt with a 12/60 times magnification. The use of a tripod is recommended for the binoculars with 20 times or more magnifying power.

It should not be forgotten that the brightness is decreasing as far as the magnification increases or the lens aperture decreases. Binoculars featuring a high magnifying power may have difficulties in showing the dark objects. Therefore the light gathering power of the binoculars is much more important for the amateur astronomers.

7x30 are the most commonly used binoculars in daylight as their magnifying power and the image definition are quite satisfying. On the other hand, the same model of these binoculars with a lens aperture of 50mm is more convenient for the night use. In the chart given hereunder you may find a clearer comparison regarding the magnifying power and the lens aperture:

Other Concepts
Right along with the magnifying power and the light gathering power, some other main features create the difference between various brands and models available in the market and the deficiency of some features or their inadequacies are presenting the quality of each device. Before considering the measures that we need pay attention, let’s take a look at the special terminology which may help us through comprehending the meanings of these features:

Coating Material
The coating is basically applied in order to increase the image quality of the optical devices. It is performed by evaporating some thin materials over the lenses and the prisms. The light losses are prevented thanks to the coating so the image becomes clearer. An appropriate coating of good quality is one of the essential element which determines the quality of the binoculars as in most of the optical devices.

The focusing concept which comes across on some other optical devices such as cameras or telescopes, is a significant adjustment of the binoculars. The clearest image is obtained for the watched point by adjusting the lens distances turning the adjustment knob.

Central Focusing Wheel
The central focusing wheel of the binoculars is used to adjust the definition of both binoculars at the same time with a single action. There are also some other models where it is possible to adjust the definition for both eyes with the same piece.

Exit Pupil
The exit pupil is an optical value calculated by the proportional division of the objective lens diameter to the magnifying coefficient. While bigger exit pupil provides a better brightness in low light conditions, the main factor to pay attention is the full suitability of the exit pupil to the lens dimension. This suitability may be different from person to person and nowadays the dimension of the binoculars’ exit pupil differs from 3 to 7mm.

Field Of View
The field of view is a measurement which indicates the whole field seen clearly around the definition point by the binoculars focused at a certain point. As far as the visual angle increases the field of view becomes wider. While observing the objects moving quickly, binoculars with wide field of view should be used.

Dioptric Correction
The dioptric correction features a special definition adjustment for people having visual impairments with their specific binoculars.

These are the big lenses composed of different glass combinations located at the front part of the binoculars.

Resolving Power
This ability of the optical devices recreates the watched object dot by dot and shows it in a much clearer way.

Points to be considered before buying one Following the technical explanations, we would like to present a useful list of the points to be considered before buying a pair of binoculars. You may find hereunder the points to be checked during your binoculars shopping:

Mechanical Check
Take the binoculars in your hands and check them in terms of workmanship and material quality. In the second phase, grab the binoculars from both sides and fold it slowly. Be sure that no strange noise is coming and the joins are durable and smooth.

Focusing Check
Move the eye-sockets one by one and together. Be sure that you checked the focusing for both of your eyes.

Coating Check
Expose the binoculars to the sunlight and check if there is any coating defect or stain. The light reflecting from the front and the back side of the objective glass should be coming “from above” and “from behind”. In case the lens is coated with a nonreflecting layer, the reflections will be in blue, pink or green shades. Otherwise the reflection will be in white.

Eye suitability Check
Check the suitability of the eye housing for your eyes.

Ghost Image Check
Look at one single point with by means of your binoculars with your eyes. In case of ghost image or eyestrain then the binoculars are unadjusted. While looking at the object you choose after completing the adjustment, eloign the binoculars from your eyes couple of centimeters. The point you should pay attention is the absence of the ghost image in this situation.

The highest binoculars technology is always developed and used by the military. In common with the end of the cold war, most of these high tech binoculars became available in the market with much lower prices. While the weapon scopes and mini binoculars were underlying in due time the military and the intelligence services, nowadays most of them are available to be bought by everyone. As far as the best binoculars have been introduced in the market with lower prices, to understand the reasons of the optical technology level behind the accelerated professional nature sports and to distinguish the low technology optical devices become much more important. In other words, distinguishing the god and the bad become inevitable accordingly in a market where any kind of advanced technology binoculars are available.

Following this brief introduction and explanations, let’s now examine the terminology and the definitions frequently mentioned in the binoculars technology:

Binoculars are the ones used with one eye, while the monoculars are used with both eyes. At the present time, very small, micro binoculars and again, micro monoculars fitting into trousers pockets are available. These types provide ease of use to the users with their small, practical and easy portability. Binoculars are coded in a simple way. The codes consist of two numbers divided by an “X” sign. For example a pair of binoculars with the 10x50 indication on it means that they have a 10 times magnifying power. In other words, when you look through these binoculars the target point looks 10 times closer comparing to the look with naked eye. On the other hand the second number indicates the front lens diameter. As far as the number goes up the binoculars gathers more light and the image becomes clearer. The best binoculars are the combination of the magnifying power, image quality, dimensions, weight, lifetime and quality. The quality of binoculars may not be understood at first sight. To do this, the durability, the performance against over-temperature or extreme cold should be examined. The most efficient binoculars on condition that the brand and the quality is good, are the ones with a magnifying power of 7x50, 8x56 and 9x63. However it is quite hard to find these models except the 7x50 model. Only the specialized companies are producing these binoculars models. The field glasses used within the military are generally the 7x50 model.

The central focusing wheel adjustment of a monocular serves to focus both eyes at the same time. You may correct the definition of a non-sharp image for both eyes at the same time by adjusting the dioptric correction which is commonly placed on the right side.

The coating is coated by means of the evaporation of very thin material layers over the polished lenses and optical devices’ prisms with the purpose of decreasing the flash effect and increasing the light conveyance. Optical devices are suffering of critical light losses (reaching 40%). The coating process in performed in order to prevent these losses and to improve the definition of the image and the every single lens of the optical device which refracts are coated by means of evaporating very thin layers over these lenses.

This means the correction of human eye’s inconstancy by means of adjusting the objective lens placed on the right side of the binoculars between “+0-“ interval.

The exit pupil is the round space placed inside the eyepiece and seen from 25cm of distance. This space is an mathematical value obtained by dividing the objective lens diameter to the magnifying coefficient. As far as the exit pupil becomes larger, the image will get brighter in low light conditions. In other words, the binoculars having a larger and round exit pupil give a better result whenever the light is low. The adaptation of the eyepiece to the Exit Pupil depends also on the person’s age. This adaptation happens faster in younger people and later in older people.

Due to their extreme magnifying powers, such telescopes are used in watching further or smaller objects. In order to prevent the shaking the use of a tripod is recommended. They are quite suitable for long distance and longtime observations.

The central focusing wheel adjustment of a monocular serves to focus both eyes at the same time. You may correct the definition of a non-sharp image for both eyes at the same time by adjusting the dioptric correction which is commonly placed on the right side.

The field of view is the measurement of the field seen by the device when we look from a 1000 yards distance in “feet”. As much as the angle becomes wider, the field seen widens. In order to watch fast moving actions or the wild nature, wider angles are mostly used.

This is the adjustment made on the binoculars so as to get a clearer image of object or objects at different distances. This adjustment is automatically done in some binocular models (focus-free).

This type of binoculars enables the adjustment of each side separately for both eyes.

When you look through astronomic telescopes you do not stay with watching everything inverted, you also see all the things you look upside down. This system is basically developed for you to enable seeing things what you look at through these binoculars just as you see when you look with naked eye.

These are lenses located at the front side of the device and composed of two or more different glasses.

Two different types of prism system are used in binoculars. These are the PORRO and the ROOF systems. It is quite easy to understand which system is used on a pair of binoculars. The lenses are smaller and rowed in a linear way in the binoculars where the Roof prism system is used. While in the devices using the Porro system, eyepieces are independent from the front lenses. Usually the Porro prism systems are providing a deeper image.

This is ability of the optical device to show the object clearly by joining its image dot by dot.

The mirror-lens technology (muxutov type) transfers directly the image of the object. The light circulates three times inside the device. While the best image quality and long magnifying range is kept in this way, a smaller and lighter device becomes possible. Non-telescopic, in a word fixed telescopes use this system.

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