What is a wide angle lens? What does a wide angle lens mean

A wide-angle lens is a type of photographic lens. A wide-angle lens has a shorter focal length than a standard lens and a wider angle of view than the human eye. In general, a 35mm camera has a wide-angle lens focal length of 28 mm to 35 mm and a field of view between 76 and 64 degrees.

The wide-angle lens has a wide field of view and a long depth of field, making it suitable for general snap-shot and general landscape photography. If the focal length range is 15 mm to 24 mm and the angle of view is between 110 degrees and 84 degrees, it is an ultra-wide-angle lens. Those close to or even greater than 180 degree angles are fisheye lenses.

Lens features:

The most criticized aspect of wide-angle lenses and ultra-wide-angle lenses is their severe barrel distortion, or negative distortion. The image of a square object becomes a four corners that shrink inward, and the middle of the edge line protrudes outwards like a barrel, hence the name barrel deformation.

The reason for the distortion is that the distance between the imaging point and the optical axis is different, and the lateral magnification is also different due to the different bending ability of the lens to the color light, and the result is that there is an aberration between the actual image and the ideal image.

For example, if you take a group photo, the faces of the people standing on both sides will be uncontrollably deformed. People can use photoshop and other image drawing software to make simple corrections to make up for the distortion problem somewhat.

In contrast to the distortion of the barrel of the wide-angle lens, pincushion distortion or positive distortion may occur at the telephoto end of the telephoto lens or zoom lens, and the image of a square object will become concave on all sides, with the four corners protruding like a pillow.

The exception is the 16mm Hologon lens from ZEISS, which has a wide 110-degree viewing angle but no distortion at all. The widest-angle anamorphic lens is a 12mm F Zero-D lens from Venus Optics with a 122° angle of view.

The explanation of the wide-angle lens is as follows:

A wide-angle lens is a photographic lens with a shorter focal length than a standard lens, a larger angle of view than a standard lens, a focal length longer than a fisheye lens, and a smaller angle of view than a fisheye lens. Wide-angle lenses are divided into two types: ordinary wide-angle lenses and ultra-wide-angle lenses.

The focal length of an ordinary wide-angle lens is generally 38 24 mm, and the angle of view is 60 84 degrees; The ultra-wide-angle lens has a focal length of 20 13 mm and a viewing angle of 94-118 degrees. Due to the short focal length and large angle of view of the wide-angle lens, it is possible to capture a large area of scenery in a short shooting distance. The lens of a wide-angle digital camera has a short focal length, a wide angle of view, and a deep depth of field, which is more suitable for shooting larger scenes, such as architecture, landscapes and other subjects.

Features of the wide-angle lens:

The basic feature of a wide-angle lens is that the lens has a large angle of view and a wide field of view. The range of things that can be observed from a single viewpoint is much larger than what the human eye sees at the same viewpoint; The depth of field is long, which can show a considerable range of sharpness; It can emphasize the perspective effect of the picture, and is good at exaggerating the foreground and expressing the sense of distance and proximity of the scene, which is conducive to enhancing the appeal of the picture.

The focal length is shorter than that of a standard lens, but the angle of view is wide. Suppose you shoot the same object with a standard lens and a wide-angle lens at the same distance, the latter has a wide range of images, although the image is small. Usually, if there are geographical restrictions, some scenes that cannot be fully captured with a standard lens can be photographed with a wide-angle lens.

Therefore, wide-angle lenses are often used to capture large areas of scenery, such as tall mountain scenes, wide buildings, large processions, and all indoor displays.

The development is suitable, and the various levels of shadow tones expressed on the ** can be consistent with the light and shade of the original scene, which helps to express the atmosphere. Shadow tone also refers to the tone of the whole picture, such as a certain ** is high (light) tone, low (dark) tone, or contrasting strong tone, or soft and flat tone, etc.

A wide-angle lens is actually an ordinary camera, but compared to ordinary lenses, it has a shorter focal length and a larger angle of view. This kind of camera shoots very well and is one of the most popular ones nowadays. Some don't have a photographic aspect, just don't know what this stuff is.

So what does a wide-angle lens mean?

1. What is a wide-angle lens: A wide-angle lens is a very popular one now, and many people may have heard of it, but they don't know what a wide-angle lens means. In fact, the wide-angle lens is a kind of camera lens, but the focal length is shorter than that of ordinary lenses, and the angle of view is larger than ordinary lenses, the focal length of the lens is about 13mm to 38mm, and the angle of view is about 60 degrees to 118 degrees.

This lens can capture a large area of scenery in a short shooting range. Generally, the wide-angle lens of a digital camera has a shorter focal length and a wider angle of view, making it suitable for landscape photography.

2. Features: The biggest feature of the wide-angle lens is that the angle of view is large, and the scene area that can be photographed is relatively wide. With the same camera, the scene with a wide-angle lens will be much larger and fresher.

To put it simply, if you shoot the same object at the same distance, you can only capture part of the scene with a normal lens, but you can shoot a larger area with a wide-angle lens, and the contrast between shadows and tones is very strong.

3. Basic performance: the wide angle lens has a large viewing angle range is the biggest feature, when the photographer shoots in a small space, the distance to the photograph is relatively short, it is difficult to shoot all with an ordinary lens, but if you use a wide-angle lens, you can increase the capture area and easily solve this problem. Moreover, the wide-angle lens can properly deform the scene, making the shooting effect more magnificent and clear.

For a simple example, if you shoot with a 28mm wide-angle lens, shoot about 3m away from the camera position, and adjust the aperture to f8, then you can shoot all the scenes beyond 1 meter, which is why the wide-angle lens is loved by photography enthusiasts.

4. Shooting effect: The wide-angle lens is very suitable for shooting large buildings or landscapes, which can increase the depth and clarity of the picture. Therefore, many pocket-sized cameras now use this lens, and it is very easy to see the effect of distortion.

The shorter the focal length, the clearer you can see.