Wide-angle lens

Before introducing a wide-angle camera, first look at the camera's focal length. In fact, when people talk about the focal length of a digital camera, what they are talking about is not the actual focal length of the digital camera, but the equivalent focal length, which is the focal length relative to the traditional 135 camera. From the photography principle, the smaller the focal length, the wider the field of view, and the wider the range of scenes that can be accommodated in the photograph. The larger the focal length, the narrower the field of view, which means that you can photograph very distant objects.

In traditional cameras, wide-angle lenses of 28mm or more are very popular, but due to the special characteristics of ordinary digital cameras that have a relatively small size of the light-sensitive devices, the physical focal length of the lens needs to be very short, resulting in aberration correction. Anti-Xuanguang coating and other high requirements. As people pay more and more attention to wide-angle shooting, about 3,000 yuan now, inexpensive wide-angle digital cameras are also increasingly popular. Ricoh is the "original ancestor" of home-made high-performance portable wide-angle digital cameras. From the G3/G4 wide to the current RX/GX series, 28mm wide-angle is its biggest selling point. In addition, Canon, Olympus, Konica Minolta and other cameras also introduced 28mm wide-angle cameras.

For most popular digital cameras on the market, the wide-angle focal length is generally between 35-38mm. The real wide-angle digital camera is actually the lens focal length covers 28mm wide-angle products. Since the 28mm wide-angle field of view is wider than the 35mm and 38mm wide-angle angles most commonly found on digital cameras, the 28mm wide-angle field of view is a 76-degree field of view, and 35mm is only 62 degrees, so it can produce a unique visual effect that accommodates a wider range of scenes. . This is why consumers are more optimistic about 28mm wide-angle digital cameras. The biggest feature of wide-angle is that it can capture a wide range of features, such as the exaggerated sense of distance, wide focus range and other shooting characteristics. When using a wide-angle lens, the object in front of the eyes can be made larger, and the objects in the distant area can be made smaller. The distortion of the surrounding image is also a major feature. Wide angle also allows any point in the image to be adjusted to the most appropriate focal length, making the picture sharper, which can also be called full autofocus.

The wide-angle digital camera has a short focal length, a wide viewing angle, and a deep depth of field. It is suitable for photographs of larger scenes, such as architecture and landscapes.