Eight tips for choosing a magnifying glass 1) Parameter identification: the number in front of the magnifying glass indicates the magnification, for example, 8X30 indicates that the magnification of the magnifying glass is 8 times. If it is a double rate type, please separate the two numbers with a/sign. For example, 2x/4x means that the magnification of a magnifying glass is 2 times, and the magnification of a certain area in the magnifying glass is 4 times. If the lens is rectangular, the width of the lens is indicated by the front number, and the height of the lens is indicated by the back number, in millimeters. For example, 100X50 means that the width of the lens is 100 mm and the height is 50 mm. Like a telescope, a fake magnifying glass likes to make a fuss about the magnification, and the nominal magnification is often much higher than the real magnification. In fact, the common magnification of single-lens magnifiers is below 10, and that of double-lens magnifiers is below 20. If the magnification is high, you need to use a microscope. Different occasions need different magnifications, not the higher the magnifications, the better. High magnification means small field of vision, which is more important in some occasions. (Magnifier multiple =250/ lens focal length+1, mm unit)
2) Lens material: High-quality magnifying glass will use high transparency and low dispersion optical glass or advanced optical resin material, with clear and bright images and small chromatic aberration. In order to reduce the cost, cheap magnifying glasses often use cheap window glass or low-grade resin materials to make lenses, which leads to yellow and blurred images and serious color difference.
3) Lens surface type: A high-quality magnifying glass will use an aspherical mirror to ensure full-field high-definition imaging and effectively eliminate cylindrical deformation (one of spherical aberrations). However, this kind of lens is difficult to grind, and the cost is high, that is, it is made of resin material. The mold manufacturing technology is high and the price is expensive, so all cheap magnifying glasses use spherical mirrors. This process has low cost, but the spherical aberration is obvious and the edge imaging clarity is very low.
4) Number of lenses: In order to correct the aberration of a single lens at high magnification, a high-quality magnifying glass will adopt the method of combining two lenses into one. The solution of cheap magnifying glass is relatively simple. Continue to use a single lens, and then claim how many times the magnification of this magnifying glass is. Anyway, most people can't see the authenticity of amplification.
5) Frame material: the frame of high-quality magnifying glass will adopt a metal frame with a certain thickness or a tough plastic frame. Considering the cost, the cheap magnifying glass will either use a thin metal frame or a cheap and fragile plastic frame, which has low durability.
6) magnification: some high-quality magnifying glasses will create a high-magnification area at the edge of the lens, which can not only get the large field of vision brought by low-magnification magnifying glasses, but also get the high resolution brought by high-magnification magnifying glasses, which is very practical. Cheap magnifying glasses are almost all designed with single magnification.
7) Humanized design: At the beginning of the design of high-quality magnifying glass, product design engineers will consider human usage habits and implant ergonomic principles to make users more convenient. For example, they will fully consider the product weight, mirror size, storage method, product use and other factors, and then carry out personalized design. A cheap magnifying glass is often a pole to the end, as long as it has a magnifying function, regardless of whether it is convenient and practical for people to use.
8) Appearance design: High-quality magnifying glasses usually put a lot of effort into appearance, especially the complicated appearance requires expensive mold development expenses, but usually the products produced in this way will be more favored by consumers, and the high-quality magnifying glasses with unique appearance can even be used as decorations. Cheap magnifying glasses are generally traditional in appearance, and they are put into production by directly developing a simple mold, so the price is very low, but usually consumers can't get them and can't match the identity of users.
What brand of magnifying glass is good? 1. British coil kohl magnifying glass
Coil is the largest magnifying glass brand in the world. According to the trade white paper published by the European Union in February, 20 14, the global sales of coil magnifiers in 20 13 years reached more than 10, accounting for nearly 40% of the global magnifying glass market share. This is the first time that the coil magnifying glass has won the global magnifying glass sales champion for 10 years in a row.
COIL is located in Birkingham, England, one of the largest and most dynamic industrial bases in Europe. Coil headquarters is only 15 minutes' drive from London Heathrow Airport. 1936, ArthurKingston acquired the optical industry and became the leader of plastic optical components. The company took the lead in using precision injection molding technology to shape plastic optical components. When more and more low-vision products enter the market, the coil brand is gradually recognized by the global market, and the coil products are sold to more than 30 countries through more than 600 dealers around the world.
The reason why the coil magnifying glass can occupy the first place in the global market for a long time is that the coil is the leading brand of magnifying glass technology in the world. The company invests a lot of manpower and material resources in the research and development of magnifying glass technology every year. If you compare the COIL Cole magnifying glass, you will find that under its unobtrusive appearance, its clarity is obviously better than other brands:
& lt 1 & gt； . Coil patented lens materials and coatings
Ensure the Qualcomm light rate and clarity, and more importantly, ensure that the imaging will not be realized due to amplification. This makes the coil the best magnifying glass product in the world.
& lt2 & gt。 Big lens and view.
Coil magnifiers have advantages over other brands at the same magnification.
Big lens and view. This design stems from COIL's unique lens technology. This makes it easier for users to use the magnifying glass conveniently and quickly.
For example, as a treasure-level portable magnifying glass, the coil 10 times the product, such as 827 1,1times the magnification, while another brand magnifying glass of the same level, such as Yishibao15/kloc-0. So the 827 1 of the coil will be more suitable for observing the target.
In addition, COIL's ATMAX series is a classic of the global magnifying glass, and its three products are very well known. These three products are the only portable magnifiers with large lenses and LED lights in the world. Among them, the 83*59 large lens of 8273 is especially suitable for the elderly. This product. It is also the best product for the elderly and the top product of the magnifying glass for the elderly.
& lt3> ultra-stable light source circuit system
Some of COIL's advanced products, including AT8 series, ATMAX series, ATMAX series and RAYLITE series, such as its well-known 827 1 magnifier for treasures and 8273 magnifier for the elderly, adopt a stable circuit system inside, unlike other brands' magnifiers, which are directly connected to LED through DC power supply. It is precisely because of the internal stable circuit system that the stability and uniformity of the light source are ensured and the clarity of the magnifying glass is provided.
& lt4 & gt。 Touch switch, easy to use.
COIL's ATMAX and AT8 series all use touch switches. Moreover, AT8 series magnifiers such as 827 1 Jianbao also use rechargeable batteries, which is very convenient to use.
2. German Epoch Eisenbach Magnifier
ESCHENBACH is the second largest magnifying glass brand in the world, accounting for about 15% of the global market share in 20 13 years. The biggest feature of Yishibao magnifying glass is its novel design, which is why it can become the second largest magnifying glass brand in the world.
Since its establishment, the brand has taken novel design as the development direction of the company. Although there is a big gap between the development and definition of magnifying glass technology, its unique and fashionable shape will still attract your attention.
Because there is no technical difference between the series products of ESBO Magnifier, unlike the series products of Coil Cole, the price difference of ESBO Magnifier mainly comes from the difference of appearance, while the price difference of Coil Magnifier mainly comes from the difference of different technologies or definitions.
There are no high-definition products in the whole product line of Ebobar, unlike the advanced products of COIL, which have stable power supply system, touch switch, large lens and other technologies. Therefore, the product definition of eBay is basically equivalent to the intermediate product 7 series of COIL, such as 727 1.
3. German Schwaetzer Vision Magnifier
Vision Vader is the third largest magnifying glass brand in the world, accounting for about 8% of the global market share in 20 13 years. Schwayder is very similar to Yishibao in product positioning.
Similarly, both of them take product design as the direction of magnifying glass. Therefore, the competition between these two brands in the global market is very fierce. Technically, it's the same as Yi Shibao, but it can't compare with coil Cole.
In recent years, the rapid growth of vision poses a great threat to the second position of eBay in the world. In recent years, Vidal has been clearly ahead of Esteban in design.
In the European and American markets, the prices of the same grade products of these three brands are basically the same. Of course, some high-end high-definition models of COIL, such as ATMA and AT8 series, will cost a little more.
The main well-known model of magnifying glass is 1. Treasure magnifying glass.
Magnifier is widely used in the field of treasure exploration at home and abroad. Jianbao has high requirements for magnifying glasses. Treasure lovers generally choose the top portable treasure magnifying glass.
& lt 1 & gt； British Coil Cole 827 1 Gem Magnifier
The world's top special magnifying glass for Jianbao is the only one with its own stable circuit system in the world. The stabilization circuit provides a more stable output for the LED auxiliary light source, thus ensuring that the amplified image is clear, uniform and undistorted. So as to ensure that every detail can be observed during treasure identification.
At the same time, COIL COIL 827 1 is also the only treasure magnifying glass with touch switch and charging design. Convenient for treasure hunters to use.
More importantly, as a 1 1 times Jianbao magnifying glass, Cole 827 1 uses 40mm lenses, while other brands 10 times magnifying glasses use 35MM lenses. The large lens ensures a wider field of vision when observing, and can also clearly and comprehensively discover the details of the treasure.
It is precisely because of the above reasons that Cole 827 1 has always been the first choice for treasure lovers around the world, and it is also the world's number one treasure magnifying glass, with the cumulative global sales exceeding 1 10,000. It occupies nearly 50% of the global market share of Jianbao Magnifier. The real magnifying glass of the world's top treasure costs about 120 dollars abroad.
& lt2 & gt。 Yishibao151112 magnifying glass
Esobo15112 is a magnifying glass with a magnification of12, which is novel in design. However, there is no stable circuit design inside, and ordinary 2 5th batteries are used. Relatively speaking, the lens is small, only 35MM, and the field of view is small.
As a mid-range magnifier of foreign countries, eBay15112 has the largest sales volume in eBay's product series. Although there is a certain gap with Cole 827 1 in clarity and vision, it is basically enough for the most common treasures. The foreign price of this model is about $70.
& lt3 & gt。 British Coil Coil 527 1 Gem Magnifier
Cole 527 1 is a mid-range professional treasure magnifying glass with 1 1 times. Compared with 827 1, it does not adopt advanced power stabilization system and touch switch design, but it is still an excellent treasure magnifying glass.
Cole 527 1 adopts a 40MM super-large lens, which has a better view than its main global competitors Escobar1512. In terms of clarity, the two are basically the same. Kohl 527 1 and eBay15112 can be said to be a pair of enemies, and they have been competing head-on in the global market for a long time. In the international market, the prices of the two are basically the same, both around 70 dollars. For larger lenses, Cole's sales volume is about 0.5 times that of esteban/KOOC-0/5/KOOC-0//KOOC-0//KOOC-0/2/KOOC-0/.5 times.
The above three models are the three top treasure magnifiers in the world.
2. Special magnifying glass for calligraphy and painting appraisal
Calligraphy and painting appraisal, because many imitations are highly simulated, using a magnifying glass requires that the magnifying glass has an ultra-high magnification, which is as high as 12 times as possible, and at the same time requires high definition and even and bright LED lights.
Therefore, the internationally renowned brand led by coil specializes in the characteristics of calligraphy and painting appraisal, and produces special magnifying glasses for calligraphy and painting appraisal. Different from ordinary treasures, calligraphy and painting are a plane. For plane objects, the use of closed fixed focal length will make the magnifying glass achieve the clearest observation effect. The magnifying glass for calligraphy and painting appraisal was born.
The most famous model at present is 7329. Cole 7329 coil in Britain is the largest sales magnifier for calligraphy and painting appraisal in the world, with the magnification of 14.7 times, fully enclosed high-brightness LED lamp illumination and ultra-high definition lens. Become a model of magnifying glass for global painting and calligraphy appraisal.
3. Magnifier for the elderly
Old people are the main users of magnifying glasses. As far as the eyesight of the elderly is concerned, in foreign countries, the elderly mainly buy large lenses with LED lights and magnifying glasses with 2-3 times magnification. Many people in China buy ordinary magnifying glasses for the elderly without LED lights. In fact, they can't see in a little poor light.
Therefore, it is suggested that older people buy a magnifying glass with better quality and higher definition. Instead of buying a low-quality magnifying glass.
Internationally, there is a very legendary product in the high-end magnifying glass for the elderly, which accounts for more than 80% of the magnifying glasses for the elderly in Europe and America. This is a coil Cole 8273 magnifying glass for the elderly.
COIL applies its top technology to the 8273 model to create the highest quality magnifying glass for the elderly. Caring for the healthy life of the elderly has always been an important part of COIL corporate culture.
COIL Cole 8273, with 83X59mm large rectangular lens, equipped with exclusive ultra-stable light source system and tactile switch, is a top-class magnifying glass in terms of convenience and clarity, which is very suitable for the elderly.