18 55 Why is it called a dog s head?

The head of the 18-55 is basically a wide-angle to standard lensFocal length, that is, a standard zoom lens, does not belongTelephotoIt is impossible to shoot distant scenes.

As for the dog's head, it is a common name for everyone relative to a good lens, which means that the ** is low, or the imaging quality is not very good, etc., but not all the image quality of the dog's head is not good, such as what we commonly call "small spittoon."

The image quality of the Canon 50mm aperture standard lens is good, but **only for the working class.

It's a very good standard lens.

We feel that it's not that the dog's head can't shoot well, and even that some masters can shoot with a dog's head better than some novices with a red circle head (that is, a high-end lens produced by Canon, named after a red circle in the front part of the lens).

That is, it is often said that the key is the human head, not the lens.

The 18-55mm head is not a mid-focus head, let alone a telephoto head. Therefore, it can't hit far, that is, about 10 meters (here is the guess you said about birding), and it can't shoot a long shot, that's for sure.

The Canon 500D or 550D with an 18-55mm lens is definitely not enough, but some 500D and 550D are equipped with an 18-135mm lens.

That's enough. If your kit is equipped with an 18-55mm lens, you can spend less than 2000 yuan to buy a 55-250mm lens, so that you have a telephoto (non-full-frame camera 250mm multiplied by the magnification is a telephoto with a large focal length).

Second, the two lenses achieve seamless coverage of focal lengths.

The third is that you said that you are a recent graduate, if you are still just staying for the purpose of this year's travel, you can use these two lenses first, and then the level will go up, or the requirements will be higher, and the same is true for better lenses (you can go to the color shadow Mowgli** to find the forum of the canon 55-250mm lens, the lens is really good).

The dog's head is relative to the bull's head.

Even if the SLR lens has the same focal length, there is a big difference in lens quality according to the workmanship, materials (such as the use of low-dispersion lenses, nano coatings, etc.), lens group design (aspherical lenses, internal focus, floating focus, etc.), constant aperture, multi-page aperture, the use of ring ultrasonic motors, and manual assisted focusing throughout the process, lens stabilization, etc. High-quality lenses such as Nikon's gold hoop head, Canon's red circle (L) and green hoop head, which sell significantly higher than cheap heads, are known as bull heads. On the contrary, ordinary cheap heads are collectively referred to as dog heads.

Although the dog's head is relatively simple in terms of design and materials, it can still shoot well under certain conditions. The shooting conditions with bull heads are more extensive, such as low light, backlit shooting, etc.

The dog's head is a concept relative to the bull's head.

As the name suggests, the bull's head is a good shot, and the dog's head is a bad shot.

The difference between them is reflected in the image quality, distortion control, whether the aperture is constant, etc., and there is a big difference between the dog head and the bull head in terms of technical specifications.

More intuitively, the difference between the two is in **. This difference is not absolute, but a lens like the 18-55, which only sells for five or six hundred yuan at best, is certainly not a good lens.

The main thing is the picture quality.,The picture quality of the dog's head is relatively average.。

The sleeve in the SLR set can cover the commonly used focal length, but the general quality is not high, the coefficient of 18-55 multiplication, almost equivalent to the general 3x optical zoom digital camera, you can buy 18-105 that if you think it is short

Generally, low-end lenses are called dog heads, which refer to lenses with poor workmanship and imaging.

Because the imaging quality is relatively poor, it is called a dog's head, and that head is very good for you. You can't find his shortcomings, you just don't think it's good enough. After a few months of playing, you may gradually understand why this head is not good.

As for how far you can shoot, hehe, I didn't ask that, how far do you say your eyes can see??

It's just a title for everyone. As long as it is relative to a zoom lens with a constant wide aperture. For example, 24-70 and so on are called bull heads, and 18-55 can only be called dog heads.

The difference in effect is a little but not too big, but you can't see the difference in daily patting.

This is a title, for example, someone is called Ah San, someone is called a dog or something, everyone is used to it, and there is such a title, which is the same as a person's nickname.

A dog's head refers to a sleeve for a low-end camera as a sign of contempt for it.

EF 18-55 is a pullover for 1000d, 450d, etc., so it is a dog's head.

Its quality is far worse than that of the "bull head".

The advantage is that it is cheap.

Because the imaging focusing performance is relatively poor, there is a gap between the 18-55 ratio of the n's family.

The imaging is a grade of the same as Nikon, but the workmanship and cost performance are higher than Nikon's.

Compared to the Canon 18-200mm, it is really too far behind, and the focus is too poor.

The difference with 18-200 is in the ** and focal length range.

There is almost no difference in image quality.

Purple edge is 18-200 powerful.

There are few lenses and the focus is not good.

50 8 tablets in 6 groups.

18-55is 9 groups of 11 tablets Is 50 more doggy?

The 18-55 lens is an entry-level SLR set lens, whether it is workmanship or imaging quality, it is relatively general, if the shooting effect is turned on the automatic transmission, many people can't even distinguish whether it is a SLR shot or an ordinary digital camera shot on the computer, hehe.

This shows the quality of this lens, which is why everyone says it is a dog's head.

However, 1855 is very cheap, suitable for new SLR students to practice, and it is recommended to change the lens when they are proficient.

Dog's head is for bull heads.

Bull head, is a high-performance lens.

The dog's head is a lens with average performance.

The existence value of the dog's head is relatively low, but the performance is quite enough......This can satisfy a subset of users who are short on budget or who do not have high requirements for camera performance.

The performance of the 18-135 lens is really average, so it is called a dog's head.

My 5,000 yuan Sigma lens also has uneven damping.

The 24-70 worth of 9,000 yuan used by the Beijing Canon Experience Center is also a bit uneven.

Modern lenses, I haven't found a particularly good feel, but a purely manual old lens from 3-50 years ago, which feels extremely strong.

It's purely a mistake in the production After all, **cheap Since there is no problem with focusing imaging, it means that it is still a good head As for the mysterious thing like the feel, I'm afraid this head can't take care of it.

It's fine, it's normal.

In fact, the dog's head and the bull's head are used to distinguish the different image quality of the lens. For example, we often say that this person is very powerful, and we say that he is very good, and the camera is the same. On the other hand, the picture quality is very "dog" and very bad, it is the dog's head.

Some lenses are of good image quality and workmanship, and will be recognized as bull's head, such as 70-200 telephoto, etc. The main judgment of a lens is good or bad, and it can often be distinguished from the market. The expensive lens materials are high-quality, the lens group structure is more perfect, the aperture is larger, and the image quality is naturally better.

But there is no one absolutely strict standard for bull heads.

With the 50 in your hand, its image quality is compared to -105 These sleeves, whether it is aperture specifications or image quality, it is obviously not in the same grade, so it can barely become a bull's head in comparison; But there are 50 above it, the lens group is more perfect, the aperture is one step larger, and the positioning price is more than three thousand. At 50 at the moment, less than half of the 50 is clearly the dog's head.

However, there is also a saying that the bull head dog head is not talking about the head in front of the fuselage, but the head behind the fuselage. Equipment is not the only criterion for determining the quality of the picture, in front of the limited equipment, use your own technology to give full play to the characteristics of the equipment, and win with technology and connotation, that is the real kung fu, is the real bull.

The head with general imaging effect is commonly known as the dog head, the bull head as the name suggests, the head of the cow b, is generally a very good head, and it is not cheap!! 50 The bull's head in the dog's head is cost-effective. But it's only a few hundred yuan, and it's always a dog's head. That's good.

A bull's head is better than a dog's head, it's a dog's head, it's a bull's head.

Dog head refers to those relatively cheap lenses, which are called dog heads. For example, 18-55, 55-300, 18-135, 18-105 and other lenses are relatively inexpensive lenses, which are commonly known as dog heads. At the same time, it also means that the sharpness of this type of lens is not high, and the distortion, dispersion and other processing are not very good.

In the initial stage of optical products, some popular lenses are seriously distorted, and some exaggerated claims are that they can shoot people's heads into dog heads. But so far, as long as it is not a famous factory and a famous mirror, it has been called a dog's head by nitpickers. But even this lens is much better than those of card cameras.