Is the SLR camera better from Canon or Nikon?

I think Canon is better, mainly because of the following points:

1, Canon Optical R&D Center is in a leading position in Japan;

2. Canon's lenses are complete;

3. Canon's L-head uses fluorite lenses;

4, Canon's fuselage is better.

Please see this article for details, hehe, you will know for yourself!

Analysis and comparison of 70-200/2.8 lenses in various factories

Recently, everyone put this topic on the "agenda" and kept talking about Xiao Gangbao, Xiao Hei (Sima 70-200), Xiao Bai and Guo Xuwei. Even related to Xiaobai's problem, friends including William Brothers, Ruoyu Brothers and Phantom 2000 Brothers felt it necessary to put them together to "fight" in order to compare this most commonly used focal length segment.

I. Overview:

The focal length of 70-200 has always been a battleground for various lenses. First, this focal length is very popular, and its sales volume is second only to 28-80, which is regarded as a standard lens. Success is closely related to life and death. Moreover, this lens has been developed for a long time, and the optical structure is very mature. Moreover, in order to make the imaging quality of the lens reach a considerable level as much as possible, almost every company has applied high-cost technologies such as internal focusing and low-dispersion glass to the lens, and the constant large aperture is bound to make this product a high-priced product.

However, for the original factory, there is no doubt that they are ahead in optical technology. In order to meet the satisfaction of demanding professional users, their products have reached the best level in mechanical and optical aspects. For optical products such as lenses, the most important thing is the glass lens that constitutes the lens. As we all know, German lenses mainly come from the use of optical glass from Schott Glass Factory, so they have made the best optical products in the world.

No matter how hard the Japanese lens works, there is still a big gap. This is the power of glass. Now, there is also such a saying for the lenses of the original factory and the deputy factory. Among Japanese lens factories, Nikon, Canon and Pantex all have their own glass factories, and the formula and production process of lenses are highly confidential.

In the sub-factory, Tuli's optical glass production level is the highest, and its ED glass has been designated by many well-known manufacturers. But I don't know why Tuli rarely uses such high-grade and expensive materials, but the output of large-diameter ED glass produced by Tuli ranks in the top three in the world, and the price of a single piece with a diameter of 300 mm exceeds 70,000 yen-there are few such capacities in the world.

Then there is the ability to design. In optics, Canon's optical R&D center undoubtedly has the strongest design capability in Japan. Especially in recent years, Canon has made many innovations in optics. Although it can't be compared with Chase's achievements in creating classic structures, it is indeed 5- 10 years ahead of other factories in application. In the very important aspect of electro-optics, Canon has decisive patents on many key technologies, just like ultrasonic motor technology. At first, due to the influence of patents, the factory spent a lot of time trying to develop a technology to compete with it. As a result, in less than five years, all the factories that can provide autofocus cameras, including Nikon and Minolta, are moving closer to ultrasonic technology. Until now, this trend is still emerging.

In Japan, there is also a manufacturer with strong design and reverse design capabilities-Sigma. This is a professional lens factory with a short history, starting from a design center. Their strength lies in their strong reverse design ability, which should be felt by everyone. No matter what new technology the original factory introduces, he is always the first to follow up. The weakness of this company is that due to the lack of production history and management experience, most of their lenses are not durable enough in the early stage, or the mechanical quality is poor, which is really helpless compared with the firmness of Longteng and Tuli; Although there are some improvements now, the impression of "preconceptions" cannot be reversed overnight. And today, the processing quality of Sigma's lenses still can't compete with big manufacturers such as N and C.

Second, the key to lens quality is low dispersion glass:

The quality of low dispersion glass must be emphasized here. Now the lens often talks about how many pieces of low-dispersion glass it uses, but different manufacturers have different grades of low-dispersion glass.

First of all, fluorite glass is the best optical material with the lowest dispersion in nature. The main component is calcium fluoride, which is a chemical substance with high chemical stability, acid and alkali resistance and is not very soluble in water. Because of this, natural crystallization is rare and artificial crystallization is difficult. The biggest disadvantage is that it is fragile, difficult to process and has poor anti-vibration ability. Therefore, magnesium fluoride is used to replace it in the military to make the hood of infrared missiles. Only Chase, Leica and Canon use fluorite as lenses in photographic lenses. Other manufacturers use special mixed glass to achieve the purpose of low dispersion, on the one hand, to minimize the problems caused by dispersion, on the other hand, to avoid the deterioration of the lens' ability to withstand harsh environment caused by the use of fluorite glass.

Because most manufacturers use mixed glass, the products of different factories will inevitably bring differences. Among the hybrid glasses, Canon's Super UD is the best. It has the optical properties close to fluorite, but it has the processing properties of ordinary optical glass, and the production cost is greatly reduced. However, there are not many applications in the lens, but Canon's new products still seem to be unable to replace fluorite. However, relatively speaking, the use of fluorite in future products may be less and less, and it should be replaced by super UD.

Canon also has a UD glass, which is the same model as the ED glass used by Nikon, Pantex and Olympus. This is by far the most mature product in production technology. But in fact, the optical properties of these companies are still different, and they can only be said to be basically the same as a whole. The usage of this kind of glass in products is equivalent to the same level, which can be considered as having the same efficiency.

For each sub-factory, their position and emphasis on economic benefits make them change their tune when using this relatively expensive material: First, Tuli developed a material with lower cost and lower dispersion by using her powerful raw material production capacity and widely used it. But this kind of material is also divided into several types: SD, SHD, etc.

Longteng clearly shows that their LD lens is not a general low dispersion lens, but only a low dispersion lens.

For Sigma, there are several kinds of lenses, and now they are widely used like Tuli and Longteng, but slightly higher than them, but there is still a considerable gap compared with the original. Sigma also has ideal low-dispersion glass, which is roughly equivalent to ED glass. But as far as I know, it only uses one macro lens of 180/3.5, but the price of this lens becomes very high, and it loses its competitive advantage with the original product.

The difference between low dispersion glasses, including the advantages and disadvantages of lenses, can also be seen from the structure: the thickest lens on the lens should use low dispersion glass. If this is not the case, and low-dispersion lenses are rarely used, for example, there is only one lens, that is, a cover, just like Nikon's earliest 70-300ED, which can be said to be an advertising behavior that deceives consumers.

Moreover, lenses like fluorite can't be glued to other lenses, and they can only be used independently, and so can good low dispersion lenses. For the lens design with the same function and performance index, the more lenses, the better. This is mainly to reduce the processing difficulty of each single lens and correct all aberrations more accurately, but it is also a severe test for the coating level of each factory.

3. Vacuum coating of lens:

Judging from the tests in Japan, Canon, Fuji and Lulai are the best lens factories in the world, and they can easily produce multilayer coatings with more than 9 layers. The rest of Pantek's Smc 7 floor, Datong T*' s 6 floor, Nikon's mc and so on are all excellent.

Longteng has the highest level of lens coating in the vice factory, and some coating technologies exceed the original factory. And manufacturers like Ricoh, including its highly acclaimed GR 1 28/2.8 lens, have only 3~5 layers. Among the three lens factories that everyone cares about, Sigma is the worst. Its multi-film transmission efficiency is slightly lower than other manufacturers. The most troublesome thing is that its coating is not strong enough, and it has been lacking in praise in high humidity areas, such as Japan, Hong Kong, Chengdu and so on. This is also an important reason why the performance of its lens decreases greatly with the increase of service life. In the second-hand market, Sima's lenses are often the cheapest and nobody cares.

There are many kinds of zoom lenses with medium and long focal length, and there are many choices, but they are still far from being really applicable and practical. Whether amateurs or professionals, the choice of this distance should be 70(80)-200(2 10) or 100-300. At present, all the 75-300 and 28-200 zoom lenses still have great problems in image quality, and they are all waste of money such as dog heads.

The most popular is the "big guy" like 70-200/2.8. This kind of lens is the best zoom lens at present. The aperture is large, the imaging quality is high, and the most commonly used F/4 product is also an acceptable bottom line.

Fourth, the simple evaluation of common brand lenses:

The following comments on several products are rash, but the opinions of one family are inevitably too subjective. Let's take it easy and shoot bricks.

1。 First of all, talk about Nikon. Nikon has launched five generations in the focal length range of 80-200. The earliest Ai-S is very rare, and the price/performance ratio has always been mysterious. However, according to the first generation AF, there should be little difference. The optical structures of the first and second generation AF versions are exactly the same, but there are two different products just to improve the mechanical design. The difference between them is mainly the position of the hood. On the whole, this shot is very successful. Although there are many mechanical problems, it does not live up to Nikon's reputation in imaging for many years. At that time, it was also unique, just a little behind the EF 80-200/2.8L, and it was also called the legendary swordsman.

What is really perfect is the third generation AF80-200 produced by Nikon. This generation of lenses has changed the original unreliable single-ring structure into a double-ring structure, and added the design of (fake) internal focus and internal zoom. This is a mature product of a generation, and now it is commonly known as "XGP" by film friends. This lens has greatly improved the image quality compared with the previous two generations. With the help of three ED glasses, Nikon imaged.

The fly in the ointment of XGP is that the imaging quality decreases when the focal length is 200mm, and the defocusing imaging effect under large aperture is slightly insufficient, which leads to many criticisms.

Later, under the powerful offensive of Canon, Nikon once again launched a new generation of AF-S 80-200, but it can be seen that this is a very immature product. Although as many as five pieces of ED glass are used, the improvement of optical performance is limited, and it is not as good as the previous generation in many aspects. Although the silent ultrasonic motor with faster focusing is used, it is huge in size and weight. Although it looks "unparalleled in SHEN WOO" in your hand, only F5 can feel the balance when you hold it.

Seriously, the optical level of this lens has indeed improved, especially to make up for the performance gap of the previous generation of 200 focal lengths. However, there are gains and losses, which are not as good as the previous generation in the 1980s. Moreover, the imaging of this generation is becoming softer and softer, and there is less and less "Nikon flavor", which makes many N households unhappy.

Therefore, after the launch of AF-S VR Nikkor70-200mmf2.8G, in view of the price and brand loyalty, N Daxie is still AF 80-200/2.8ED N, which should not be lower than others. Because Nikon is Nikon, there is no semicolon and it is unique.

2。 Next, let's talk about Nikon's "life and death enemy"-Canon.

Canon made a sudden effort after entering the AF era, and seized the leading position of innovative technology with excellent photoelectric technology. Many lenses are introduced into the professional field for the first time, providing a series of very good L lenses. But unfortunately, the L of Canon's L lens means luxury, robbing money like a real gun;

Although there are many amateur shots that can surprise people, there are also many dog heads that make people laugh and cry.

Canon's earliest 80-200/2.8L lens was introduced with the professional machine EOS- 1 at that time. Although it was expensive (it was the most expensive at that time, so it was worthy of the name L), the imaging was very good, and the speed of AF was very fast even by current standards. It soon laid a world for Canon in professional photography, and vomited the evil spirits that Nikon had suppressed for many years.

When the ultrasonic motor technology matured, Canon once again introduced the peak 70-200 lens, and later added the IS lens with anti-shake technology. These two lenses are excellent in that respect. So far, no one can beat him, and he is worthy of the title of Mirror Emperor. If there is no innovative technology introduction, going beyond this point can only be empty talk.

No wonder the price of lenses has not changed much for so many years, and the second-hand market is hard to find, which shows the affirmation of users.

However, the resolution of these two lenses seems to be a little better than 80-200, but the sharpness is greatly improved, so the overall performance is much higher, especially at the focal length of 200mm, which can be comparable to fixed focus.

At the same time, Canon has not given up the market development of medium-priced lenses. The 70-200/4L called "Guo Xuwei" is such a representative. The price of this kind of lens is about half that of Xiaobai, which is very attractive to many cash-strapped movie friends.

Many people will think that this lens will be better than Xiaobai's when they see fluorite and super UD lenses. In fact, they ignored a very important issue: the resolution of the lens is related to the maximum effective aperture. The larger the aperture, the greater the luminous flux, the more information collected and the stronger the resolution. Although this law is out of proportion due to other optical problems, it is still obvious.

After many tests, Guo Xuwei is still slightly inferior to Xiaobai. Even so, the image of Guo Xuwei is still very good, and we can't underestimate it just because its price is lower than Xiaobai's. Although it lacks the unique Jiao Wai blur effect of the first-order aperture, it is nothing, especially for people who shoot scenery and travel far, its lightness is very attractive. Guo Xuwei's mistake was that he didn't attach a tripod ring when he sold it. The profiteer charged more than 2,000 yuan for this alone, almost half the price of the lens! This is a big nerve-racking problem, especially with some lighter fuselage.

Canon changed the "back group focusing" mechanism of fixed-focus lens to "inner group focusing" (only moving the middle lens group), and realized high magnification zoom and light weight on 70-200L.

According to the description of Canon lens work, the internal focus type has the following advantages:

1. Because only the light lens group is moved, the automatic focusing is extremely fast and the manual focusing is also very light;

2. The lens length will not change due to focusing;

3. The overall light weight of the lens system is realized;

4. The filter box will not rotate;

5. The focus ring will not move back and forth when focusing.

Finally, talk about the purchase "decision":

My personal opinion is that there are three price bands: below 5000 yuan, 5000-8000 yuan, and above 8000 yuan.

The premise is which price range you are prepared to pay, or you decide a primary "weight factor" among several factors such as image quality, weight and price, and you have the determination not to "go back on our word" within five years.

Remind you: the principle is-rather short than much.

It's easy to get down. If you ask me, I suggest you choose the original factory as far as possible. You can't go wrong-

Canon uses white, and if you want to be lighter and cheaper, use Guo Xuwei; Nikon's XGP is famous for its great value (I will prove it by mapping below). If I have enough financial strength, I will buy Xiaobai. As for Nikon's new VR G head display, I have to take a look. By convention, Nikon's G series lenses are not high-end lenses;

The lenses of other sub-factories are not up to the challenge (perhaps only XH can be regarded as "half"). In this focus period, it is better to lack money than luxury, and don't blindly "invest". It is better to watch others "greedy" and make do with it when you have enough money.

Otherwise, there will be many regrets in the future. It's best not to think about 28-200, 75-300-this is my own experience: a fever experience with great losses.