How to buy a applicable binoculars in the twin telescope binoculars to buy tips for buying

one,How to buy a applicable binocular Telescope

Three directions of the consideration of the two -Tube Telescope without external diameter, magnification, and lens quality:

CaliberTheThe size (diameter or caliber) of the objective mirror (lens in front of the Telescope), The double -Tube Telescope on the market is used to use it20mmto70mmThe diameter is more common, such as the label on the Telescope12 x25Of25The representative diameter is25mm(2, 5Cm.,,12It represents its magnification, the larger the caliber, the larger the volume, and the light power of the caliber and the Telescope(Brightness) Calling portrait (clarity)There is a great relationship,12 x 25and12x50Two dual -microscopy is also the same12DoubleBut the latter's brightness and sharpness must be higher than the former.

When you consider the diameter of the dual -Tube Telescope, there are nothing more than two options:

1. If you are ornamental concerts, various ball competitions, mountain climbing, outing travel, etc. to facilitate the use of priority, it is best to choose small and medium -caliber (35mmthe following) The model, the size of the size is also light, but it is inevitable that the brightness and resolution will be sacrificed.

2. If it is astronomical observation, night or long -distance observation, etc. with high brightness and high -solution image as the first priority, choosing a larger caliber will be ideal.Most of the binocular Telescope already has a tripod fixed -hole design, which can be fixed on the average camera tripod. It can not only reduce the burden on both hands, but also greatly improve the stability.

High and lowTheGenerally, consumers mostly consider the multiplier when choosing a Telescope. The higher the ratio, the better. In fact, it is not correct. The high rate does not represent the clearer image and the caliber is larger.The biggest advantage of the Telescope is that it is easy to carry and has high maneuverability. If the long -distance observation requires a higher power rate, it is recommended to choose a single -Tube Telescope effect.

lens qualityTheThis item can be considered the most difficult to understand in the average person. A two -Tube Telescope optical part is:1. object mirror.2. Eye mirror.3. Prism.Combined, let's talk about it first:

1. object mirror:That is, the lens closest to the target of the two -set lens barrel at the front of the two sets of goggles. The image is directly related to the quality of the objective mirror. Generally, most of the products are combined with two lenses.The Telescope uses three combinations, or uses itED, Fluorite and other special material lenses to reduce the effects of color differences.

2. Eye mirror: When using a Telescope, the lens group near the eyes is called the eyepiece (left and right eyes), Typical eyepiece is composed of three optical lenses. The vision of the eyepiece itself is about50Around the degree, the actual field of vision is to divide the eye mirror vision. If the same multiplier twin Telescope mirror, if you want to have a large field of vision, and maintain a good image around the field of vision, you need more lenses, more complex design to correctThe price is relatively improved.

3. Prism:If there is only a combination of objective mirrors and eyepiece, the imaging of you see is reversed, so a set of positive prisms need to be added on the light path between the objective mirror and the eyepiece.In the normal direction, the material of prism is generallybak-7glass, higher -level models will choose high refractive indexesbak-4The prism makes the image brighter.The two -Tube Telescope design must be used with a roof spine prism(ROOF PRISM), the production is more difficult, and the price is usually relatively high.

The above optical common sense, I believe it will help, the last three principles for your reference when you choose:

First, when you consider carrying convenient carriers and choose small models, the multiplier rate should not be too high, otherwise you may be disappointed because the brightness is too low.

2. You must understand what the purpose of using a Telescope?It is the best choice of one that suits you need.

3. Find a professional company to tell your purpose and budget in detail. I believe that as long as you are a professional company, you will definitely give you a satisfactory service.

Second, the tips for buying a bilateral Telescope

1. Trip tips for buying a long -range optical effect

Generally, when we buy a Telescope, we will see the same specifications of the Telescope. The price is very different. This is mainly because the lens of our Telescope is different because it affects the quality of the Telescope optics.The brightness of the general Telescope is the highest, and the brighter it means that it can see further.

The better the lens coating, the more transparent the lens, the darker the reflective.There is also a red film Telescope. The red film of the lens not only increases the brightness of the Telescope, but also makes the imaging more similar. Everyone can also choose this type of Telescope.

2Functional purchaseTips

The internal nitrogen of the Telescope has a water effect, and it can also prevent the fog of the internal lenses and the mold. This is mainly because the Telescope is seal, so this increases the durability of the Telescope.Talk about the advantages and disadvantages of different prisms of the Telescope, generally there arePorroPrism and prismroofPrism.PorroAlthough the prism is large, the structure is simple, the light transmission rate is high, and the imaging quality is good.androofThe prism, although the volume is small, but the structure of the prism is complicated and the light transmission rate is low.

3. Buy a Telescope workmanship and materialTips

1. 1.It is made all plastic.

2.It is mixed with plastic and metal, and its main parts are made of metal materials.

3..It is made of all -metal. This is the best durability of the Telescope in the three materials.