What are the stresses of photography?

An excellent photographic work must first be achieved through photographic technology, mainly through lens selection, position determination, reasonable light distribution, accurate focusing and correct exposure, such as choosing a wide-angle lens to expand the range of viewing angle and depth of field, using a large aperture to highlight the subject image, and determining the exposure according to the specific situation and performance intention of the subject. This requires photographers to have solid knowledge of photography technology and rich shooting experience.

Second, the artistic requirements

1, with a clear theme

A photographic work should have a clear theme, which can tell a story, exchange an idea, or express an emotion, and give the viewer feelings, associations and inspiration until it produces a * * * sound. The distinctive theme is the soul and core of photographic works.

2, the main body is prominent

A good work should have visual impact and can quickly attract the attention of the viewer to your work. This is to express the theme through a theme that can attract the attention of the audience. The subject should be the focus of the whole picture, which can be people, things or things.

3, the picture is concise

In order to highlight the theme, only those things that are essential to express the theme are taken, and other things that scatter the theme are excluded or compressed to make the picture focused, concise and lively. "Painting is addition and photography is subtraction" refers to this truth.

4. Beautiful form

Any art pursues beauty, and photography is no exception. Photographic works with formal aesthetic feeling can attract people's attention and let the audience get beautiful enjoyment and pleasure from appreciation. The aesthetic feeling in photography is mainly realized through the collocation and combination of colors, the coordination of tone and shadow, the clever use of projection and the arrangement and processing of light.

Occasional exposure leaves all kinds of things, and there are thousands of words between square inches. It is the good wish of many alumni to keep beautiful moments and unforgettable memories with their own cameras.

Because of this, some friends have tasted the ups and downs of failure and success. But for more friends, photography seems mysterious, but it is out of reach.

A successful photographic work needs the perfect combination of photography technology and art, and a photographer should be a "saint".

On this page, I will introduce some knowledge about photography to my friends. If friends encounter problems in photography, they can write to us and we will answer them in a targeted way.

How is the image in the photo formed?

Anyone who has taken photos knows that the birth of a perfect photo needs to go through a complicated technological process.

The process of image formation is shown in the following figure:

1. Shooting exposure

First, the photographer must record the picturesque and colorful scenery on the built-in film of the camera through the lens of the camera. This step is usually called photographic exposure and is an indispensable part of the whole photographic process. At this time, there is an invisible image on the film, which is called "latent image", as the name implies.

2. Development of negatives

The shot film must be developed to turn the potential image into a visible image. The work of developing film can be done by a professional development shop or by yourself. If a color negative film is used, after developing, bleaching and fixing, we can see that there is an image on the film that is opposite to the original scene and has complementary colors. Usually, we call this image a "negative image". Movies with negative images are called negatives.

I would like to remind my friends that:

Film is a special recording material, which is different from all kinds of paper used by painters and writers. This material can't be opened in a bright room before it is washed with water, and no image can be seen when it is opened. Moreover, if you open the cassette at this time, it will ruin your previous shooting results!

Don't underestimate the small negative, only its quality is good, the image in the photo can be good. The developed film must be kept clean to prevent dust and scratches. Therefore, after the wet film is dried, it should be cooled in a clean environment. Don't let dust stick to the film, and don't touch the film casually with hands or rags, which will easily leave fingerprints or scratches on the film. Don't expose the washed film to the sun, but store it in a special film bag to avoid dust. Because once there are scratches on the negative, it will leave dark stripes on the photo, and if there is dirt on the negative, it will leave a corresponding white image on the photo.

Step 3 print or enlarge

Seeing negative images is not the ultimate goal of photography. If you want to see the image with the same brightness and color as the original scene, you need to enlarge the negative image on the small negative to the required size through the lens of the printer and print it on colored paper after exposure. When you zoom in, you can cut pictures, correct colors, copy multiple pictures and copy them into different sizes. After printing, what remains on the photographic paper is also an invisible "latent image".

4. Washing photographic paper

The processing methods of photographic paper and negative film are basically similar, but not exactly the same. After development, a color image with the same brightness and similar color as the original scene will appear on the photographic paper.

The photography process involves many specific technical problems. For example, the grasp of shooting conditions and the control of developing conditions. Every link can not be ignored, because they will affect the quality of the picture.