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Company news about What is the difference between bird watching spot scope and telescope?

What is the difference between bird watching spot scope and telescope?


Latest company news about What is the difference between bird watching spot scope and telescope?

Shape and purpose are the most intuitive difference. Of course, there are many subtle differences.

Bird-watching spot scopes are more refined than ordinary telescopes in terms of color and clarity.

Bird watching enthusiasts are the most demanding group in the world for telescope requirements, especially optical quality. Because of this, we, as the telescope manufacturer, have been putting a lot of effort into bird watching spot scopes. It can be said that among the telescopes with a diameter of less than 50mm, the bird-watching spot scope represents the level of telescope manufacturing today and is the top telescope. But users seem to be far from satisfied, and more advanced models are still under development.


For a bird watching enthusiast, the performance of the telescope in the wild can be summarized into three: image quality, ease of use/handle, and waterproof and anti-construction performance. The perfect bird watching telescope should show the true details and colors of the birds, just like the birds in front of us, no matter what the distance and the light conditions. You can carry them all day without feeling mentally and physically fatigued. In the rain, or accidentally immersed in water, during severe temperature changes, all possible collisions and vibrations should be safe.


The most commonly used weapon for bird watching enthusiasts is a handheld binoculars,but with the development of technology , if you want to see farther birds, such as water birds, or want to see more details, then you need to buy a monocular spot scope is out. There are many monoculars sold on the market, but they are not necessarily suitable for bird watching. Let me talk about how to choose a suitable monocular bird watching spot scope based on my own understanding of telescopes and bird watching.

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                                                   spot scope manufacturer


1. Optical type: Many types of monoculars can be seen on the market, but not many are suitable for bird watching. First of all, it is necessary to rule out the reflection type telescope, such as the Newtonian type. People must observe from the side of the lens barrel, and the result is an inverted image. Folding telescopes are also not suitable for watching birds, because their focal length is extremely long and the magnification is too high. Moreover, both the primary mirror and the secondary mirror are silver-plated, which will cause light loss and yellowish color. In addition, the secondary mirror can also cause the diffraction of incident light and reduce the sharpness. Therefore, generally speaking, monoculars for bird watching are basically refraction type, monoculars with too large diameter and long focal length are not suitable for bird watching, so the mainstream bird watching monoculars we can see at present are all with a diameter of less than 100 mm. Short focal refractor.


2. Objective lens aperture: It is generally recommended that the aperture of the bird watching monocular is 50~90 mm, and the aperture is closely related to the volume, weight, and multiple of the telescope. Too small a diameter will cause the effective multiple of the telescope to be too low, and it cannot be used for fine observation. Too large a diameter means a larger volume and weight. For the birdman, carrying a big guy on the mountain and wading is not a thing. Easy things. At present, the diameter of mainstream bird watching spot scope is about 80 mm. For less fanatical birders (such as me), I like to bring a 55mm small-diameter bird watching spot scope when going out. For female bird watching enthusiasts, it is 50-65. The caliber of the room will not cause physical burden, and the matching tripod and head can also be lighter.

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3. Objective lens structure: The most common objective lens adopts a double-glued structure, that is, two pieces of glass with different refractive indexes are glued together to obtain an achromatic effect. A high-quality objective lens will adopt a double-separation structure, that is, to properly separate two lenses with different refractive indexes. Compared with the double-bonded structure, two variables (curvature of the middle lens and lens spacing) can be increased to obtain a better aberration correction effect. . A better objective lens uses a three-separation structure, that is, three separate lenses. However, such a structure seems to be used more in top refracting astronomical telescopes, and it is very rare for bird watching monoculars.


4. Three parameters of the eyepiece: exit pupil distance-the maximum distance between the eye and the last eyepiece lens that can see the entire field of view. Generally speaking, it is between 15-20 mm. If it is too small, the eye must be attached to the eyepiece. After that, the entire field of vision can be seen clearly, and dark shadows are prone to appear too far away. Field of view-the field of view here does not refer to the size of the field of view of the telescope, but refers to the size of the eyepiece. A field of view of 50 to 60 degrees will achieve satisfactory results.


The field of view of the telescope = the field of view of the eyepiece / the multiple of the telescope . Focal length-this is a very important parameter, because the telescope's multiple = objective lens focal length / eyepiece focal length, choosing eyepieces with different focal lengths can combine different multiples. (About magnification: bird watching activities are usually carried out in the daytime, which is more affected by light. If it is cloudy, the multiple should not be too large, otherwise the exit pupil diameter is too small and the image is dim. If the sun is sufficient and the atmosphere is transparent, the magnification can be Appropriately larger, but imaging at a too large magnification will cause light refraction due to atmospheric density fluctuations, which will cause the image to be blurred. Generally, the commonly used magnification is between 20-60 times).


5. Coating: High-quality coating can not only improve the brightness of the image, but also improve the color reproduction of the image, reduce flare and glare, and help to see a bright and clear image. The best coating is to coat all air contact surfaces of the lens with a low-reflectivity multilayer coating. Traditional models will be coated with a relatively simple blue anti-reflection coating. Some junk models will be coated with sparkling red film.


6. Spot scope body material: The top models will use aluminum-magnesium alloy to manufacture the mirror body, which is reliable and light, and of course expensive. Some models will be made of composite materials. I generally believe in the durability of metals. After all, they have passed the test of time. The life span of these new materials remains to be tested by time. Common fuselages are made of aluminum alloy, which is cheap and reliable. In terms of price, you don't have to worry about the weight being a little heavier than aluminum-magnesium alloy. There are many monoculars spot scope bodies made of plastic or rolled with thin iron sheets. The price is cheaper, but the lifespan is lower. It is not recommended to buy.

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7.Nitrogen-filled and waterproof: This is a very popular technology. Dry and clean nitrogen is injected into the internal cavity of the sealed telescope to prevent the intrusion of fogging, mold, dust and moisture inside the telescope, which can adapt to the wild with a changing climate. environment. Greatly improve the service life of the telescope. Now some high-end models have begun to use argon gas with high molecular weight, low loss and high stability as the internal filling gas of the telescope. Of course, the cost will be higher than that of nitrogen.

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8. Position of the center of gravity: For a good telescope, the position of the center of gravity should preferably be at the position where the quick release plate is connected, so that it will be very easy to change the point of the monocular telescope. Sometimes the appearance design must obey the optical design, causing the center of gravity to deviate, and it is necessary to use a small accessory such as a center of gravity slider to correct the position of the center of gravity.


9. Focusing: It is recommended to use an inner focusing monocular as the bird-watching spot scope because the objective lens and eyepiece of the telescope with this structure are fixed when the focus is adjusted, and only a negative lens inside the telescope is moved. The advantage of the structure is that it can achieve higher airtightness. In addition, the feel of focusing is very important, too loose damping will easily slip past the clear point, and too tight damping will make the fingers fatigue. Suddenly tight and loose damping can make you crazy, as if you are sitting on a seesaw, unable to find a balance point. The high-end single-tube bird-watching spot scope will have two/dual focusing wheels, one for coarse adjustment and the other for fine adjustment, so that the focusing can take into account both speed and accuracy.


The position of the focusing wheel is also very particular. Generally speaking, people’s right hand is more flexible, so it is best to choose a monocular lens with the focusing wheel on the right.

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10. Aiming hole: a finder mirror similar to an astronomical telescope. For the sake of simplicity and ease of use, some bird watching monoculars have a small hollow cylinder on the side. You can aim at the observation target in advance before observation, so that it is easy to find the target through the eyepiece.


11. Angled tube VS straight tube: It is generally recommended to choose an angled tube as a bird-watching spot scope, because it is most comfortable for a person's neck to observe with an angled tube when looking up. If you use a straight tube, you must extend the tripod to a higher position to get the eyes, which will reduce the stability of the tripod. However, a straight tube is more suitable for connecting small digital cameras to shoot birds, because the line of sight and the direction of the telescope are the same.

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12. Tripod and window mount: Tripod and window mount are problems that many novices tend to ignore.


A light and reliable tripod is very important. The lightness can reduce the burden when traveling in the field, and it can improve the stability during high-magnification observation. If the economy permits, a carbon tripod is a very good choice. Some low-priced domestic aluminum alloy tripods also have good performance


Bird watching telescopes are generally not suitable for the use of ball tables. First, it cannot guarantee that the central section of the monocular can always be perpendicular to the ground.

Second, it is not very convenient to change the direction of the telescope. It is recommended to choose a camera mount with a single handle to control the left and right and tilt, the operation is the easiest. The single handle is best on the left side of the gimbal, so that when using the telescope, the left hand holds the single handle to control the pointing of the telescope, and the right hand is placed on the focusing wheel to adjust the focus at any time, which is very convenient. It’s best to choose a good mount. If you use a mount that is too wide, too astringent, and too tight, it will be more scratchy when you change the direction of the monocular lens.

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