Detailed explanation of the parameters of the bilateral telescope purchase method is to answer what kind of good binocular telescope

Detailed explanation of the parameters of the bilateral Telescope purchase method is to answer what kind of good binocular Telescope

We often hear friends who come to buy a Telescope and ask, "How far can your Telescope look at?", "Can your Telescope be more doubled?", "How can your Telescope be put in the sky?" ...This problem reflects the public's lack of Telescope and astronomical knowledge.

The so -called "see how far" and "how big" are not scientific nor meaningful, and the quality of the Telescope is by no means this way.

In fact, "how far to see" depends entirely on the brightness of the observed target. As long as the goal is bright enough, we can see infinite distance without a Telescope. For example, we can see about 6,000 stars that we can see with the naked eye.In the end of infinitely; and "how big" is the problem that the basic knowledge of astronomy will be raised, this is because we see "the stars in the sky" or more are stars, and the stars are so far away from us, soEven if they are observed with the largest Telescope on the earth, they are still just geometric highlights (the smaller the highlights, the higher the quality of the optical imaging of the Telescope; on the contrary, if you see the stars in the Telescope, the stars have vision noodles or even the color, then there are colors, then there are colors, then there are colors, then there are colors, then there are colors, then there are colors, then there are colors.It can be determined that its optical system is seriously ill). Only the celestial bodies in the Solar system (such as the Solar, planets, satellites, comets, etc.) or the celestial body (such as Nebula, Galaxy, Star Group, etc.) outside the Solar system can use the Telescope.

So is the "magnifying multiple" the performance indicators that must first consider when buying a Telescope?Definitely not!Not only does it not be ranked first, but if it is too large, it will cause the image quality to worsen seriously.

Betal (Yisuke is 8 times to 10 times)

The Telescope is marked with the words of 10 x 42, 8 x 30.Look at a 10 -fold Telescope to see a bird standing in 100 meters, as close to 10 meters with the naked eye.Due to the large rate of multiple, the smaller the perspective, the more difficult to search for the goal, and it is more likely to affect the clarity due to the trembling of the hands.When the light is very sufficient, it is clearly 10 times compared to 8 times; when the light is insufficient, 8 times can see the details than 10 times, so you should not blindly pursue a high mortar rate.

Activation (Yisuke 30mm to 42mm)

The larger the diameter, the better the diameter of the objective mirror affects the amount of light.Especially in the case of strong comparison of light and darkness, morning and dusk, and cloudy, the larger the diameter, the higher the light inlet, the more details can be seen in the eyes; but at the same time, the heavier the Telescope, and the long -term watching is more difficult to cause fatigue.It is advisable to choose a larger caliber according to your personal body.

Vision (the bigger and better)

The field of vision refers to the range that can be seen at 1000 meters. The width of the field of vision should be higher than 104 meters, which is 6 degrees.The greater the vision, the faster and easier to search for the goal.However, when the field of vision is larger, the more serious the edge is distorted and blurred. The more complicated the correction of the aberration, the higher the required technology and cost.

color guarantee (the better the more natural, the better)

High -quality Telescope must faithfully reflect the primary color and saturation of the scenery.In order to increase the brightness of the Telescope, some manufacturers deliberately increase or decrease a certain optical waves, causing distortion to make the scene blue or reddish.

The relationship between light transmission and coating is inseparable and directly affects color conservation.All optical glass high light transmission and full surface multi -layer coating, the brightness is relatively high, and the color is accurate.Generally, manufacturers will not announce all data (it is difficult to do), and some manufacturers will announce the light transmission or coating of local optical glass to mislead consumers.

Use performance

Depth of field

For the bird watching people, the depth of field is a more contradictory parameter. The depth of the field does not need to be frequent, it is more convenient to use, but for observing the forest birds, the prospects and backgrounds are not easy to blur.protrude.The depths of the field are small. Although the forest and birds are obvious and the background blur is obvious, and the theme of the birds is prominent, when the distance changes, it is necessary to re -focus. The fingers must always be on the coking wheel, which is more tired.This depends on personal preferences, there is no fixed standard.

Sealing

Wangyuan is often carried out outdoors. Observation environment is changing. It is best to choose a Telescope with water -proof water (water pressure and waterproof), so that the interior of the mirror can be kept sealed and stable.

Comfortable

Comfort varies from person to person.Generally speaking, the Telescope of the surface of the surface not only has good shockproof effects, but also more comfortable to hold; the weight of the mirror body determines whether it is convenient to use and carry for a long time; usually, everyone will choose a Telescope with high durability.