What is the black and white tone?

Lead: Tone has two meanings in photography: first, it refers to the tone of a photo; The second refers to the depth of the scene reproduced in the photo. For example, red is dark gray in black-and-white photos, which is called deep tone, and yellow is light gray in black-and-white photos, which is called light tone. Let's see what black and white tones are.

There are usually three tones in black and white photos, namely, high-key, low-key and medium-key. High-profile refers to the absolute superiority of white and light gray in photos, that is, photos composed of a large number of white and light gray are called high-profile photos. Low-key refers to the absolute dominance of black and black-gray in photos, that is, photos composed of a large number of black and black-gray are called low-key photos. Between high-profile and low-profile, black-and-white photos are not absolutely dominant, which are called middle-tone photos. A large number of black and white photos every day belong to the middle tone.

High-key and low-key are because they occupy a large area of black or white on the screen, which helps to strengthen some expressive force and artistic appeal, but also brings limitations in subject matter and content and weak three-dimensional sense of the picture. Although alto has no strong artistic appeal in timbre, it can freely express various themes and contents; Moreover, the three-dimensional sense of the picture is relatively strong, which is why a large number of photos are in the middle tone.

It is worth noting that these functions of hue are just? Helps strengthen? An artistic effect can only be enhanced if it is matched with specific content, and the specific enhancement effect needs to be determined by the content of the lens. In the relationship between form and content, it is content rather than form that plays a decisive role. This requires photographers to consider whether to use high-key or low-key when using hue as a composition factor. High-profile, high-profile, low-key and low-key practices are often counterproductive.

When considering whether to use high-profile or low-profile, we should also pay attention to whether the depth of the subject itself (including the subject and background) is suitable for high-profile or low-profile. This consideration should be active, that is to say, we should consider whether we can use photography techniques such as filters and lighting to control the color reproduction of the scene.

In the composition of high-profile and low-profile photos, we should pay attention to a small amount of thick black on the picture of high-profile photos, otherwise high-profile photos often appear weak and pale. The main light ratio of high-profile photos is smaller. For low-key photos, pay attention to a small amount of bright white on the screen, otherwise low-key photos will easily appear gloomy and dull. The main light ratio of low-key photos is greater than appropriate.

In black-and-white photography, the way to master the exposure of high-profile and low-profile photos is usually to take high-profile photos one step higher than normal exposure to enhance the clarity of high-profile. Taking tone photos is one step less than normal exposure to ensure a strong black tone. Of course, you can also take high-profile or low-key photos with normal exposure, and then make corresponding adjustments when you enlarge the photos? High-profile photos are less exposed; Low-key photos are enlarged and exposed a little more.