Why is the 18-135 lens called the dog head?

18-135 This lens is called the dog head because it is a cheap lens.

lenses such as 18-55, 18-135 and 18-15 are relatively cheap, so they are called dog heads. Mainly, the sharpness of this kind of lens is generally not high, and the color processing is not very good, there will be obvious distortion and even some exaggeration. Although the dog head lens will have certain limitations, it is undeniable that such a lens.

This kind of lens is actually called the dog head, mainly because the quality is not very good, which can meet the daily shooting needs, but it is not suitable for some professionals. In the usual use process, it will also have good advantages. For example, the required price is not very high, and there is not much pressure when buying, but it is not suitable for some professionals to shoot.

Skills of lens selection:

If we want to choose a suitable lens, we must first understand the various attributes and classifications of the lens. A camera body can access a variety of lenses, so when choosing a lens, we need to pay attention to the classification and focal length of the lens, the size of the aperture and the imaging quality of the lens.

First of all, the lens can be classified into fixed-focus lens and zoom lens, so when shooting with fixed-focus lens, the photographer needs to move the position back and forth with his legs for the distance between the framing ratio and the shooting distance; If the zoom lens wants to change the ratio of shooting distance to framing, it can directly adjust the focal length by rotating the zoom ring.