Difference between SLR lens and focal plane

What's the difference between SLR and focal plane? Below, I sorted out the difference between SLR lens and focal plane lens for you. Welcome to refer to them!

The difference between single shot and focal plane.

In the process of shooting, we found many differences from SLR shooting, such as pushing and pulling, swinging, lifting and swinging, which is completely different from taking pictures. But what I am most interested in is the difference between focal plane and SLR lens, which is very interesting. That's all for today, for the sake of everyone, and welcome friends who know about the focus plane to discuss together. Please tell me if there are any shortcomings.

First, please learn some basic knowledge about focal plane. 1. The focus plane is in manual mode MF. 2. Focus plane? Aperture? The unit is not an f value, but a t value. 3. The resolution of the camera lens is not high. Compared with SLR lens, the focal plane contrast is large, that is, the sharpness is high. 4. The focal plane is stepless and can be changed at will, that is, the aperture can be opened and closed at will between two gears. And the SLR lens has f1.2f1.4f1.8f2.0? There are gears. 5. The manufacturing process of the focal plane is exquisite, but the demand is small, so it is extremely expensive, ranging from hundreds of thousands to millions of yuan.

Some basic parameters of the two lenses are the same, such as field of view, depth of field, focal plane and so on. Maybe you have to ask what's the difference between resolution and color reproduction? Provide some data, and everyone can judge it right away.

SLR lens belongs to modern electronic lens, including fluorescent lens with optimized image quality, multi-layer coating technology with fully restored color, digital optimized purple edge prevention technology and silent ultrasonic motor drive system. Relatively speaking, the opening field is small, which is a little smaller than the APS of the camera.

However, the title is exquisite in workmanship, made of all-metal glass, without engineering plastics and resin materials, with heavy hand feel and sufficient materials. (Maybe the material will be changed later) The price of movie titles is extremely expensive, and even a set of entry-level shots of shredded vegetables costs millions. Gee!

Now the focal plane is favored by professional photographers because of its large aperture and excellent imaging quality. Speaking of this, perhaps the most difficult thing to understand is the second item above, the difference between T and F values of focal plane and SLR lens. I will focus on the following points. Friends who play photography all know the f value of SLR lens, that is, the aperture value F= focal length/incident aperture diameter.

It is estimated that many people think that as long as the aperture value f of any lens is the same, its luminous flux should be the same in theory, but it is not. The diameter of the entrance aperture of the lens depends on the diameter of the diaphragm, which is a device for limiting the size and shape of the imaging beam. Therefore, the aperture value f is calculated. Moreover, the aperture value f does not consider the influence of the optical structure, material and coating of the lens on the light transmittance of the lens. Therefore, although the aperture value f of different lenses is the same, the light transmittance is not necessarily the same, and sometimes there are obvious differences. Speaking of lens materials and coating, by the way, why is everyone? Drooling? Original factory head, the original factory head is made of sufficient materials, and the aperture manufacturing accuracy is high. For example, the effect of Canon's red circle L head is better, but the vice factory head is worse, that is to say, high-tech technology, materials and manufacturing technology.

So some of the lenses listed above must be exposed and compensated on the digital body. Well, we know the principle of F value, and then we can talk about T value of focal plane, which is much simpler. In order to solve the influence of light transmittance on exposure, some photographic lenses use aperture value t instead of F: (T is? Light transmittance? This is the focal plane.

T value =F value/square root of light transmittance

The light transmittance is measured according to the illumination of the image plane. Therefore, the aperture value t is measured. Because the t value considers the influence of various factors on the transmittance of the lens, as long as the t values of the two lenses are the same, the luminous flux is the same. Therefore, the t value is more scientific, accurate and strict than the f value. However, due to the development of lens coating technology, the difference between T value and F value has been very small. For general photography, the f value can already meet the needs. T-value is often used in focus plane where exposure requirements are more stringent.

In particular, SLR manufacturers headed by Canon, Nikon and Sony have invested a lot of high-tech coating technology in lens research and development, constantly improving SLR lenses to meet people's shooting needs. The distance between SLR lens and focal plane is getting closer and closer. In the process of shooting, it is worth mentioning that Canon's 70~200mmF2.8 (Xiaobai, nothing) is a classic lens. Needless to say, photo shooting, especially the wonderful portrait shooting, I mainly talk about the perfect performance in the shooting. With canon 1DMARK4, the color is gorgeous, delicate and exquisite, and with the charming Jiao Wai with 75mm focal plane. Even photographers who have been engaged in film for many years have given full marks to Xiaobai's performance. As far as image quality is concerned, some people say that it has exceeded the same millimeter focal plane. Oh, believe it or not, just try it yourself.

Let's talk about the fourth item above. First of all, in this case, the focal plane won the current SLR lens!

Because it is the focal plane? Stepless? Yes, when manually zooming and pushing the lens, if it is operated by a master, it is very smooth, without intermittent jitter, and the picture is very comfortable when zoomed in and out. SLR lenses have gears. I have tried many times in the process of pushing and pulling. I use a professional shelf that adults don't shake, especially a SLR lens with a large focal length span. When I push and pull manually, the light obviously darkens or brightens due to the change of focal length. Cause analysis: first, the influence of the subject becomes larger or smaller, which leads to the change of surface exposure data, and second, because of the aperture, I only think about these at present. Hehe, this has to be solved by technology, or directly produced for digital fuselage? SLR focal plane? !

At present, there are not many manufacturers producing SLR lenses. Carl zeiss in Germany specializes in producing lenses for Alai, a German film machine, while Atong in France seems to produce lenses himself. There is also Panavishen from America, who is said to make his own lenses. Next, we will wait and see whether Canon, Nikon and Sony will produce their own digital SLR bodies. Focus plane? All right.

With the continuous development of high technology, I believe that the focal plane of digital SLR will surpass that of the older generation. Take this opportunity to raise friends who like to make high-definition movies such as MV. Welcome everyone to play movies together and walk into the film art hall together!

Identification and selection of focal plane

In recent years, there are more and more people playing focal plane in photography. Her unique artistic expression is increasingly favored by photographers. Everyone who was very picky about the picture quality at first couldn't help hanging up the movie to follow the fashion. They accidentally played with fire in the field of photography, but gradually started a prairie fire. Thanks to the participation of' everyone', they pushed the image of focal plane to the scene with skillful technology and superb skills. A fantastic masterpiece shocked the court. At that time, I felt that Luoyang paper was expensive. The title of a rich movie is very cheap. Overnight, the imperial robe was added. The price has risen to tens of thousands of dollars. A good Leica movie has a title of tens of thousands of dollars. Previously, these titles were only 2,800 yuan. Creation tricks people.

Why did someone cheat? Because cheating can make more money! It's that simple.

At one time, as long as you were slightly close to the movie head, you could hang the name of the movie head, such as the enlarged head. Even the previous sideline of L.M39 has been changed into a movie title, which shows that it is profitable and unscrupulous. As far as I know, the mainstream movie titles are dominated by the constant C port, with a line diameter of one inch, which is 2.54 cm. The flange torque of the bracket is 17.5. This is an old man. The film head produced in the last two years is Cs port, which is suitable for digital cameras. But there is no adapter ring on the market at present, so we need to process a ring ourselves. Its screw is similar to port C, but its flange torque is 65438.

There are only a few so-called movie titles, but the aperture, focal length, fixed focus, zoom, size and fatness are numerous. They are produced in different countries. The film titles made in Germany and Switzerland are the most popular and belong to the nobility. American movie titles are cannon-style, Japanese are small, and China is cheap.

In terms of choice, a large aperture is suitable for any lens. The aperture of the following numbers is your best choice. It is also your most painful choice! [money] At the moment of focus, it is less than 35mm, including 35. It is easy to produce dark corners. The shorter the focal moment, the greater the dark angle. The effect of making a photo studio is ok. Generally, 16 to 9 is set or cut, unless you join a noble family, you can do whatever you want.

Nobles can focus automatically and prevent impact, but we can only do it manually, so you can choose different types of lenses according to your own preferences; As far as we know, there are the following types;

1. aperture. Focus type. This type includes zoom and fixed focus.

2. Focus type. The aperture size is fixed. Only the focus ring.

3. Aperture type, only the aperture size can be adjusted. There is no focusing ring.

The latter two are cheaper than the first one, which is exactly the treasure house we dig. According to the characteristics of Sony nex, I like the third one best. Focus plane, as its name implies, is good at making movies. I shoot video in intelligent automatic mode. After setting the aperture according to the environment, the lens takes photos with visual focal length, which is convenient and worry-free.

In a word, I like to choose a type comprehensively. I like to choose two types of flowers and plants. I like to choose three types of cameras. Each has its advantages and disadvantages.