How to choose a photographic lens

How to choose a photographic lens for a novice photographer? Below, I have arranged the selection method of photographic lens for you. Welcome to read the reference!

How to choose a photographic lens

Telephoto lens: local blur

Long focal length lens refers to a photographic lens with a longer focal length than a medium focal length lens, which can be divided into two types: ordinary telephoto lens and super telephoto lens.

The focal length of ordinary telephoto lens is longer than that of medium focal lens, and the focal length of ultra telephoto lens is naturally much larger than that of medium focal lens. Taking 135 camera as an example, the focal length of the lens ranges from 150? 300mm is an ordinary telephoto lens, and those above 300mm are super telephoto lenses. The telephoto lens has the characteristics of narrow viewing angle, short depth of field and poor perspective effect.

Narrow viewing angle: under the same shooting distance, the shot image is larger than the standard lens, which is suitable for shooting the details of distant scenes and inaccessible objects; Short depth of field: it can make the subject stand out in a messy environment, but it brings some difficulties to accurate focusing; Poor perspective effect: the perspective and three-dimensional sense are weakened, but the plane sense is enhanced, which has the characteristics of compressing the depth distance of space and exaggerating the background.

Wide angle lens: narrow adjustment

Wide-angle lens is a photographic lens with shorter focal length, larger viewing angle, longer focal length and smaller viewing angle than standard lens. Wide-angle lens has three characteristics: short focal length, wide viewing angle and large depth of field, that is, the lens has a large viewing angle and a wide field of view, and the range of scenery observed from a certain viewpoint is far greater than that seen by human eyes at the same viewpoint; The depth of field is large, which can show a fairly clear range, emphasize the perspective effect of the picture, be good at exaggerating the foreground, and show the sense of distance of the scene, which is conducive to enhancing the appeal of the picture.

Wide-angle lens is more suitable for shooting larger scenes, such as architecture, scenery and other themes. When shooting with a wide-angle lens, we should make rational use of these three characteristics. For example, if you want to shoot more and more comprehensive content in a narrow space, you need to use a wide-angle lens.

Fixed focus lens and zoom lens

Fixed focus lens is the abbreviation of fixed focus lens in camera lens, which refers to the lens whose focal length cannot be changed. There is also a zoom lens, which is the lens whose focal length can be changed, referred to as zoom head.

For a long time, the fixed-focus lens has been the first choice for photography because of its constant focal length, good imaging quality and clear image. The appearance of zoom lens was first welcomed by reporters. A lens has many focal lengths, which is very practical and convenient in complex situations or in emergencies when it is too late to replace the lens. However, the zoom lens was not very popular for a long time after it was put into use, mainly because its imaging quality was far from that of the fixed-focus lens.

However, with the continuous improvement of the lens, the imaging quality of zoom lens and fixed focus lens is not much different. Most photographers who use digital cameras have begun to use zoom lenses more. Of course, the advantages of fixed-focus lens can not be ignored, mainly reflected in the use of short and medium focal lengths: fixed-focus wide-angle lens or standard lens generally has larger aperture, shorter close-range focusing distance, smaller volume and lighter weight than zoom lens covering the corresponding focal length, and can realize the background blur effect that is not easy to realize when using large aperture. At the same time, the fixed-focus lens is generally better than the wide-angle segment of the zoom lens, and the picture quality is clearer.