I. Conditions of telescopes suitable for tourism
1. Small size and light weight.
Tourism telescopes need to be carried around all the time, so it is very important to be small and light. Unless professional enthusiasts need to choose large-caliber and large-size telescopes, ordinary tourists should choose small-sized and light-weight telescopes.
2. The field of vision must be as wide as possible.
Binoculars, small in size and light in weight, are bound to have a small aperture (the aperture of the telescope directly determines the size and weight of the telescope). Generally, the aperture is relatively small. If the telescope design is not very clever, the field of view of this small and pocket telescope will be very small. If the field of view of the telescope is too small, the sightseeing range is narrow, which makes it uncomfortable to use and can't see the panorama. Telescopes for tourism need to see as many panoramic views as possible.
3. The clarity is as high as possible
In addition to traveling, it is to see beautiful scenery. If the definition of the telescope is not high, the beautiful scenery will become ugly. A telescope with low definition might as well travel without it.
On the other hand, the aperture of the tourist telescope is very small, and anyone who knows a little about the telescope knows that the aperture of the telescope directly affects the transmittance and brightness. Therefore, small-caliber telescopes must require very good lenses and coatings, otherwise the effect will not meet the requirements.
2. What specifications should the tourist telescope choose?
Telescopes have two important indicators, one is the magnification and the other is the aperture.
1. Never pursue large magnification.
In terms of magnification, the tourist telescope would rather choose a small one than a large one. The reason is that the larger the magnification of the telescope, the easier it is to shake. Theoretically, if the multiple exceeds 10, a tripod should be used. Another point, such as 7-fold, 8-fold, 10-fold binoculars, is that the distant targets basically feel the same size.
Most people have a misunderstanding. The greater the multiple, the farther they see. In fact, whether the telescope can see far depends mainly on the clarity of the telescope. No matter how high the magnification is, the definition is not good, no.
For all tourist binoculars, it is recommended to choose the range of 7- 10, preferably 7-8 times. Easier to handle.
2. The caliber is suggested to be 25-32MM.
As I said just now, the larger the aperture, the larger the size and weight of the telescope. Moreover, the telescope has a large aperture. Theoretically, for telescopes of the same brand and style, the definition will be higher and the brightness will be brighter. But not absolutely.
3. It is recommended to choose the weight below 450g.
A telescope with this weight, if you hold it against your head, you can hardly feel its weight.
4. It is recommended to choose the size below the palm.
This size is suitable for holding in the hand.
5. When the volume and size are acceptable, you must choose the one with the largest view.
When choosing the field of view, we must pay attention to the fact that different types of telescopes, even with the same caliber and the same magnification, have very different fields of view. Visual manufacturers nominally, but for reference only. Manufacturer's data generally refers to the visual field width at 1000 meters. As a miniature telescope, it would be nice if the field of vision can reach 120 meters. It would be great if it could reach 130 meters. Because this 120 meter index is beyond the reach of many large telescopes, such as the 50MM caliber telescope.
3. Which styles should I choose for the tourist telescope?
Basically, all brands have telescopes of this size and weight suitable for travel, but not every brand is suitable, and there are not many telescopes that are really suitable for travel.
1. Ultra-light mini telescope
Generally, this kind of telescope has a weight of less than 250g and a diameter of 20-25MM, and adopts a roof structure. The fuselage can generally be completely folded.
The length of the fuselage is about 120mm, and the width is 1 10mm, and the folded width can reach about 70MM. This is a very common mini-portable telescope with a magnification of 8- 10.
The biggest problem with this subminiature telescope is:
1. Most of the views are very small, and there is a feeling of seeing the world through the patio.
2. Because the aperture is 20-25MM, the aperture is very small, and there are certain requirements for the lens and coating quality of the telescope.
In terms of clarity and vision, the following two items can still meet the requirements. In addition, such as Nikon Reading Field 10X25, the definition is too poor and the field of vision is too small to meet the requirements.
In fact, including the following two top small telescopes, the field of vision is too small to travel. The visual field at 1000 meters shall not exceed 100 meters.
& lt 1 & gt； Swarovski Pocket 10X25
Top brand, very fine workmanship. Compared with most 10X25 telescopes, this telescope has a very good field of view, small size and light weight. The price is also high, more than 5000 yuan. The imaging is also very clear, and the brightness is ok. The focus button is a little small.
& lt2> carl zeiss Victory 10X25
This model is also a top brand, its workmanship is worse than that of Shihua, its vision is similar to that of Shihua, its definition is similar, and its price is more than 5000 yuan. The problem is that the focus key is too small.
In a word, this telescope 10X25 is not suitable for traveling.
3. Doctor trophy 8X32
This is a high-definition telescope that is very suitable for travel, and it is the king of global tourism telescope sales. It uses 8 times magnification and 32 mm caliber, the volume is only the size of a palm, and the weight is 420 grams.
Although this telescope is a little heavier than 10X25, its field of view has reached 132 meters, which exceeds the field of view of 50MM with ordinary large aperture. It can be said that this universal telescope.
Using PC-3 high-definition coating, the price is about 2500 yuan, and the clarity is slightly better than the above small mirrors of Zeiss and Schwab, which cost 5000 yuan. It can be said that the cost performance is very high. So this is the most suitable telescope for traveling.
4. Elite doctors 7X26
This telescope is only 8 cm long and is the shortest mini telescope, weighing 320 grams. It's an ultra-high definition tourist telescope. 7 times magnification, 26CM aperture, 128 m large field of vision, very compact. This telescope has the highest definition in the world, far higher than the definition and brightness of the above three telescopes. According to my years of research on mini-telescopes, there is no mini-telescope on the market that can compare with this one. Absolutely first class. If you want to spend 5000 yuan on a tourist telescope, this one is undoubtedly the best choice.
Four. Lessons learned
1. When buying tourist binoculars, you must choose small and light ones.
2.20-25mm diameter binoculars are not suitable for travel. If you like folding binoculars, you can only choose Zeiss Shengli and Shihua 10X25, and the price is more than 5,000 yuan.
3. Telescopes suitable for travel. If the funds are not particularly abundant, the doctor's trophy 8X32 is very suitable. If it is the pursuit of higher quality, the elite doctor 7X26 is better.