What is a wide-angle lens?

Lead: Some users may not be familiar with wide-angle lenses. Shooting with a wide-angle lens can add color, better record the current environment and add a sense of scene to the portrait. So what is a wide-angle lens? Let's take a look at what a wide-angle lens is.

A wide-angle lens is a photographic lens with a focal length shorter than the standard lens, a viewing angle larger than the standard lens, a focal length longer than the fisheye lens and a viewing angle smaller than the fisheye lens. Wide-angle digital camera has a short focal length, a wide viewing angle and a deep depth of field, which is suitable for taking photos of large scenes, such as architecture, scenery and other subjects.

the basic characteristics of a wide-angle lens are its wide viewing angle and wide field of vision. The range of scenery observed from a certain viewpoint is much larger than that seen by human eyes at the same viewpoint. Long depth of field, can show a considerable clear range. It can emphasize the perspective effect of the picture, be good at exaggerating the foreground and expressing the sense of distance of the scene, which is conducive to enhancing the appeal of the picture.

shooting effect of wide-angle lens

Wide-angle lens is widely used to shoot large-scale landscape photography, which can increase the sense of spatial depth of the photographic picture. The depth of field is long, which can ensure that the scene before and after the subject can be clearly reproduced on the screen.

So most modern pocket-sized automatic cameras (commonly known as fool cameras) use ordinary wide-angle lenses of 38-35mm. The lens covers a large area and shoots a wide range of scenery.

The scene shot at the same shooting distance is smaller than the image of the scene shot with the standard lens; The defects of perspective distortion and image distortion are easy to appear in the picture. The shorter the focal length of the lens and the closer the shooting distance, the more obvious this defect is.

for most popular digital cameras in the market, the wide-angle focal length is generally 35-38mm. The real wide-angle digital camera is actually a product whose lens focal length covers a wide angle of 28 mm.

Precautions in the use of wide-angle lenses

1. The scenery shot by wide-angle lenses is large in the vicinity and small in the distance, and the perspective effect is exaggerated. The closer the subject is to the camera, the more obvious the exaggeration becomes. Therefore, when shooting portraits, people should not be too close to the camera, otherwise it will be easy to shoot? Fat-nosed rat ears? Distorted photos of.

2. When shooting a building with a wide-angle lens, it is easy to make the parallel lines of the building's edge contour shrink or intersect in the distance by tilting up or down the lens. Pay attention to choosing the contraction point on the center line of the framing screen when framing, otherwise the image of the building will be skewed, giving people the illusion of collapse

3. When using a hood or a color filter for a wide-angle lens, it is easy to block the periphery of the lens perspective and darken the image field, which is not easy to detect when framing, but it is obvious in the photo. Here, we should carefully refer to the manual to understand its application scope.

4. The flash coverage angle of the electronic flash is generally equivalent to the viewing angle of the 35mm lens of the 135 camera. Therefore, when taking flash photography with a wide-angle lens smaller than 35mm, a diffuser should be added in front of the flash window of the flash. If not, a layer of white paper or white handkerchief can be wrapped to increase the flash area.