What are the functions of wide angle and optical zoom of digital camera?

The so-called wide-angle lens is a lens with short focal length and large viewing angle. The purpose of using a wide-angle lens is to obtain a wider field of vision and magnificent artistic effects. Wide-angle lens can produce large foreground and small foreground effects. The picture distortion produced by wide-angle lens exaggerates the foreground object, highlights the foreground object more, and gives people a strong visual impact. For consumer digital cameras, the so-called wide angle is actually 28 mm

To put it bluntly, the general camera can only see the area in front of you, while the photos of wide-angle cameras can let you see more and more pictures that can't be displayed at wide angles. The wider the wide angle, the closer it is to people's actual field of vision, and the more comfortable the photo looks, especially when shooting landscapes and other pictures.

What's the use of wide angle:

For tourism, the benefits of wide-angle lens are obvious. It can shoot a wider landscape and is very suitable for showing the beauty of the landscape.

Wide-angle lens is used to enclose a large photographic area, which is wider than the area without wide-angle lens and shoots more scenes than before.

The meaning of extending from focal length to wide angle;

According to the principle of photography, the smaller the focal length, the wider the field of vision, and the wider the range of scenery that a photo can accommodate. The shorter the focal length of the lens, the greater the deformation of the scene, but the perspective effect is good, which can better represent the depth of the picture and obtain a wide range of clarity, that is, the depth of field is greater. Some digital cameras make use of the feature that the scene can be clearly imaged after a certain distance with a short-focus lens (hyperfocal distance), which saves the focusing function, reduces the product cost and is also beneficial to snapshot.

For most popular digital cameras on the market, the wide-angle focal length is generally between 35 and 38mm. The real wide-angle digital camera is actually a product with a lens focal length covering a wide angle of 28mm. Because the wide-angle field of view of 28 mm is wider than that of 35mm and 38 mm commonly used in digital cameras, the wide-angle field of view of 28 mm is 76 degrees.

35mm is only 62 degrees,

Therefore, it can produce very unique visual effects and accommodate a wider scene. This is also the reason why consumers are more optimistic about 28mm wide-angle digital cameras. The biggest feature of wide angle is that it can shoot a wide range, with exaggerated sense of distance and wide focus range.

When using wide angle, you can enlarge the object in front of you and narrow the object in the distance, and the surrounding images are easily distorted. Wide-angle can also adjust any point in the image to the most appropriate focal length to make the picture clearer, which can also be called complete autofocus.