What do the numbers on the camera mean?

Question 1: What do the numbers on the lens of a SLR camera mean? These two lines of numbers are "focal length". Ft is the abbreviation of feet, and the corresponding number refers to the focal length of the current lens (in feet), that is, the number of feet from the lens to the subject when the current lens is accurately focused; M is the length unit meter, and the corresponding number refers to the meter of the distance from the lens to the subject when the current lens is in focus. Therefore, combined with its visual distance from the subject, we can roughly judge where the focus ring should be adjusted to focus accurately (for manual focusing and blind adjustment), and we can also judge the distance between the lens and the subject through it.

Question 2: What do the numbers on the lens of SLR cameras mean? For example, 18-200MM f/3.5-5.6 refers to a zoom variable aperture lens with a focal length of 18-200MM, with an aperture index of 3.5 at the end of 18MM and 5.6 at the end of 200MM. Of course, this lens is generally cheaper. If the aperture index is only similar to F 2,

Question 3: What do the numbers and symbols on the camera lens mean? For example, EF 24- 105 f/4 is USM.

EF is the symbol of Canon lens group, EF-S.

24- 105 means wide angle below 35, super wide angle below 24, standard focal length above 50, telephoto above 100, and super telephoto above 200.

F stands for aperture F/2.8 or F/4 stands for constant aperture, and the maximum aperture of each focal length on the focal segment is this. If f is followed by 3.5-5.6, it represents floating aperture, and the maximum aperture varies according to the length of focal length. A basically constant aperture ratio floating aperture is good. A large aperture is better than a small aperture. The smaller the number after f, the larger the aperture. The maximum aperture of zoom lens is 2.8, the maximum aperture of fixed-focus lens is 1.2, and those with abnormal points are 1.0, 0.95, which are basically not available in the market.

Then the letters behind, each brand has a different expression, OS, IS, VR and so on all mean anti-shake.

Ed, UD, etc. Represents a special shot. It must be expensive to add special lenses.

That's about it. After playing for a long time, you will understand gradually.

There are many unexplained things in it.

Macro lens and ordinary lens have different focal lengths, but the magnification of macro lens is very high, which can reach 1: 1.

Samsung WB600 is a consumer card machine, which is enough for ordinary families to use every day, and is not much different from other card machines. Simple and easy to use, light and convenient.

Question 4: What do you mean by the number of lenses in a SLR camera? Each brand has a different label. You can't tell whether the lens is good or bad just by looking at the parameters.

For example:

Nikon AF-SD X18-55mm F/3.5-5.6g VR nikkor lens, only a few hundred dollars,

Nikon AF-SD X17-55 mm F/2.8 G IF-ED autofocus lens S-type, the parameters are not much different, but this lens costs more than 10,000 yuan.

Let me take 18-55 as an example to roughly explain the meaning:

AF-S autofocus lens, built-in focusing motor, AF type, no focusing motor, focusing is driven by the body motor;

DX is a lens specially designed for APS frame fuselage, commonly known as half head;

18-55mm focal length can be changed from 18-55mm;

F/3.5-5.6 Maximum aperture F3.5-5.6; ;

G this lens has no aperture ring design, aperture adjustment must be completed by the body, and it also supports 3D matrix metering;

VR lens displacement damping system, also known as anti-shake.

Question 5: What does the number of Canon lenses mean? It seems that you are a novice. Let me give you a general introduction, which may not be absorbed at once.

The number on the lens refers to the focal length. There are two kinds of lenses, zoom lens and fixed focus lens.

For example, 24-70 and 18- 135 are zoom lenses, which can be changed from 24 to 70, and 18 to 135. Novices commonly say: the farther you shoot, the closer you shoot, and that's what it depends on.

Some lenses, such as 50, 85, 35 and A number, are fixed-focus lenses.

The smaller the number, the wider the angle, that is, the wide angle.

The bigger the number, the narrower the angle (which makes you feel far), that is, telephoto.

So does the second one bring the distant object closer than the first one? Yes, I see farther and farther.

3. For example, how about 24-70 18- 135?

Depends on what you ask.

Of course, the imaging is 24-70, and the second generation is18-1350,000 streets, especially the second generation is 24-70.

Of course, the price is 18- 135.

Of course, the scope of application is 24-70, which can shoot all Canon SLR bodies. 18- 135 only in APS-C fuselage, EF-S lens.

The aperture is of course a constant large aperture of 24-70 F2.8. 18- 135 unstable

Of course, the motor 24-70 USM ultrasonic motor 18- 135 is the most expensive, and it is STM motor.

Of course, the working material is 24-70, so how can a big ternary red circle be compared with a dog's head?

How did 4.24L become wide-angle?

As mentioned above, the smaller the number, the wider the angle. Why is 18- 135 not as wide as 24-70? We need an explanation. (It may be complicated. Let me give an example of a 50mm lens. )

Installing a 50mm lens on a traditional 135 film camera (the film is about 36X24mm) brings a field of vision almost similar to that of the human eye (except for the residual light) (it is really 58mm similar to that of the human eye). So 50 is called a standard lens.

The film size of this camera is basically the same as that of Quan Huafu in the digital age (5D, 5D2, 5D3, 6D,).

However, the size of the machine negatives of 500 D, 60 D and 70 D is only about 24X 16mm, so a 50mm lens is also installed, because the photosensitive element is one size smaller, and the surrounding image field does not exist. In fact, from another angle, it is to shoot farther and farther. For example, take a picture of a person's whole body and finally cut out a circle of photos around him. Is the rest similar to going further? )

Therefore, after installing 50mm on this APS-C, the multiple of X 1.6 is needed, which is determined by the size of the photosensitive element. So it becomes 80 after 50X 1.6. It is different to install the same lens on Quan Huafu and APS-C.

3. As mentioned above, 18- 135 can only be given to APS-C, and 24-70 can be given to all models.

Then the effect of 24-70+ Quan Huafu = 24-70.

18- 135+APS-C = actually it should be X 1.6 = 28.8-2 16d.

4. So it is very convenient to find a wide angle on Quan Huafu and a telephoto on APS-C, so some SLR cameras positioned as sports and outdoor photography models are not from Quan Huafu, just to get a longer telephoto.

5. I'm 500d now, and I want to update my machine, but I think 70 d and 60 d are basically the same. What's the difference?

The difference is big. The gap between 60D and 500D is big enough, not to mention 70D.

First of all, the 500D itself is an entry-level positioning, which will control the overall workmanship and size.

Secondly, they are completely different in processor speed, focusing system, continuous shooting speed and photosensitive element performance. After all, not the same generation.

In addition, I think the most important thing to buy a SLR is the picture quality. If the SLR does not have good image quality, it is nothing more than an ergonomic problem. Buying 18-55, 18- 135, 18-200 SLR is a complete waste of money, and any good body will be dragged down by this lens.

It is a good choice to buy APS-C lens at least 15-85. After conversion, it is 24- 136, with wide focal length and wide angle, and the imaging is passable.

Therefore, the biggest problem in the landlord's hand is to change the lens to 15-85 first. It is suggested that the fuselage should be considered for 70D, or not changed. There is no need to upgrade to 60 d. I hope it will help you all the time.

...& gt& gt

Question 6: What do the digital symbols of Canon lenses mean? Take EF 70-200mm F2.8 L IS II USM as an example to illustrate:

EF: indicates that the lens supports Quan Huafu; APS-C frame is represented by EF-S with lens; The axis-shifting lens is marked as TS-E;

70-200mm: lens focal length. The larger the value, the larger the distant object can be photographed (telephoto), and the smaller the value, the wider the range can be photographed (wide angle);

F2.8: Maximum aperture. Used to represent the luminous flux of the lens. The smaller this value, the greater the luminous flux of the lens, the higher the shutter speed, and the greater the blur degree of the front and rear subjects;

L: It stands for luxury, which means Canon's high-performance lens. The red circle in front of the lens is the symbol of the L lens. In addition, when the symbol is DO, it means that the lens is a miniaturized lens with multilayer diffractive optical elements, and the green circle symbol is in front of the lens;

Is: the abbreviation of image stabilizer, which means that the lens is equipped with hand shake compensation mechanism, that is, anti-shake;

II: type II or II:II. In the past, lenses with the same focal length and aperture used Roman numerals to distinguish between new and old products;

USM: the abbreviation of ultra sonic motor, which means that the focus of the lens is driven by ultrasonic motor, and the lens using DC motor does not have this logo.

Question 7: What do the numbers on the SLR lens mean? Which way do you mean? There are many numbers on the lens, including focal length, aperture, lens diameter and focusing number.

Question 8: What do the numbers on the lens mean? There are many numbers on the lens, which mainly indicate the model and technical parameters of the lens. Such as the length of focal length, zoom range, aperture ratio, focal length ratio, etc.

Question 9: What do the numbers on the lens of a digital camera mean ~ ~ ~ Take the first data of the landlord as an example, 3X means that the lens of this camera is 3 times zoom; F=6.2- 18.6mm means that the lens of this camera is a zoom lens with a focal length ranging from 6.2mm to18.6 mm; 1:3. 1-5.6 means that the aperture value of this camera is 3. 1-5.6.

Looking at the data alone, the focal length difference between the two cameras is only1mm. It should be said that the actual shooting distance is not much different, of course, it depends on the area of CCD. The smaller the CCD, the longer the equivalent focal length.

The focal length of a home digital camera is usually marked with the actual value of this lens, but this value cannot be compared with the focal length of a traditional camera, so the focal length of a digital camera is generally converted into the focal length of a traditional standard camera. Tell the landlord that the focal lengths of the above two cameras are exactly the same after conversion.

These are complicated things, so it is better for the landlord to study them slowly in the future, and it is difficult to explain them clearly for the time being.

Wide angle, as the name implies, is a wider shooting angle. In fact, two cameras shoot the same scene in the same position, and the wide-angle lens can accommodate more scenes around. Neither of the above cameras has wide-angle shooting ability. But wide angle is more useful for shooting scenes.

The purchase of home cameras mainly focuses on several common parameters, such as pixel number, CCD area, zoom factor, wide angle, battery capacity, screen size and whether manual operation is supported.

Pixel count: At present, it is basically a camera with 6.5438+million pixels. It can be simply understood that the photos taken by this camera are composed of 6.5438+million color points.

CCD area: CCD is actually the digital film of digital camera. Generally speaking, the bigger the area, the better. At present, the mainstream small digital computers are basically between11.6 and 1/2.5 inches, and the area of11.6 is larger than 1/0.

Zoom factor: This data can also simply reflect the telescopic ability of the camera. Generally speaking, the higher the zoom factor, the stronger the telescope capability, but it is not absolute. For example, the five-fold zoom of a wide-angle camera is generally not as far as the five-fold zoom of an ordinary camera.

Wide angle: As just explained, it can shoot a wider angle.

Battery capacity: It is related to the endurance in use. It is very frustrating to have no electricity in the middle of a trip. Don't underestimate this data, even more important than those technical data.

Screen size: There is no requirement, but the screen is large and it is more comfortable to play back photos. Generally speaking, a 2.5-inch screen is enough. Of course, the big screen consumes more power and affects battery life.

Manual: Manual function means that the camera allows users to adjust the aperture, shutter, exposure, white balance and other data. For beginners, these things are difficult to master and of little use. For users who have some basic photography, the manual function can help them adjust the photos they want.