Photography professional knowledge test questions

Photography refers to the process of recording images with some special equipment. Generally, we take photos with mechanical cameras or digital cameras. Sometimes photography is also called photography, that is, the process of exposing the photosensitive medium by using the light reflected by the object. So what are the contents of the photography professional knowledge examination questions? Come and have a look with me!

Photography professional knowledge test questions

Composition questions:

1. What are the main factors that affect the depth of field?

Answer: (1) Aperture size: When the focal length of the lens is constant and the object distance is constant, the larger the aperture, the smaller the depth of field; The smaller the aperture, the greater the depth of field.

(2) focal length: when the aperture and object distance are constant, the shorter the focal length of the lens, the greater the depth of field; The longer the focal length, the smaller the depth of field.

(3) Object distance: The farther the subject is from the camera, the greater the depth of field, when the aperture and focal length are unchanged; The closer to the camera, the smaller the depth of field.

2. What role does Mi Tuer play in photography? How did you do?

A: Mi Tuer is an important developer. Belongs to a keen developer.

Colorless crystal, soluble in water, but slow, but insoluble in sodium sulfite solution. Therefore, Mi Tuer should be dissolved before adding sodium sulfite. Mi Tuer is a keen developer, who is the main agent of most development formulas. At the beginning of development, it developed both the part with strong photosensitivity and the part with weak photosensitivity. It stopped developing to a certain extent. Therefore, the contrast of the image tends to be soft and rich, and there is less tendency to fog and pollute the negative. Mi Tuer and sodium sulfite can be made into weakly alkaline particle developer. It has the characteristics of good preservation, large developing capacity and little influence by the temperature of the liquid medicine. Even when the developer is lower than 10 degrees Celsius, the developing ability will not be significantly reduced. However, if you use too much developer, photos will have a cool effect.

The advantages of digital camera technology are obvious, but there are still some shortcomings. Try to discuss its main shortcomings with examples.

A: First, the continuous shooting speed of most digital cameras is not fast, which can't be compared with the continuous shooting speed of high-end single-lens reflex cameras.

Second, sensitivity and tolerance are also flawed.

Thirdly, the imaging lens of digital camera is not as good as that of traditional SLR camera, which is supported by a huge lens group, so it is slightly inferior in artistic expression.

4. What is the reaction on the membrane after the failure of reciprocity rate, and what is the solution?

A: Mainly manifested in:

In black and white photography, the density of underexposed negative film can not reach the normal standard, which destroys the tone level and changes the image contrast.

In color photography, in addition to all the disadvantages in black and white photography, it is also manifested as color imbalance.

There are three ways to solve it:

First, there is a specially designed membrane marked? l？ This film is suitable for exposure time of110 seconds to longer.

Where is the mark? s？ The film is suitable for exposure time110 seconds to110000 seconds.

Second, adjust the combination of aperture and shutter as much as possible.

Third, open the aperture to increase the light receiving time and adjust the development time. Color films also use filters to correct chromatic aberration.

5. Discuss the factors that affect the intensity change of light source with examples.

A: First, the weather (1) is clear and the light source intensity is the highest.

(2) thin clouds cover the sun, (3) dark clouds cover the sun, and (4) dark clouds are gathering.

Second, time, noon intensity is the greatest.

Third, the season is the biggest in summer.

Fourth, the regional latitude is small and the intensity is high, and the altitude is high and the intensity is high.

6. Illustrate the strength of reflection ability and its relationship with brightness with examples.

A: The reflection and absorption of a scene are inversely proportional.

This characteristic is closely related to the structure and color of its surface.

The stronger the reflection ability, the greater the brightness.

The weaker the reflection ability, the smaller the brightness.

7. Give an example to explain why low-light photography should be followed. More is better than less. The principle of?

A: Whether it's a black-and-white film or a color negative, the tolerance of overexposure is greater than that of underexposure.

Film's perception of light is different from that of human eyes. The human eye has only a simple reflection function. Overexposure can not only show the outline of the scene, but also show the shadow level of the scene to a certain extent, and color film may also reproduce the color of the scene.

If it is not enough, nothing is possible.

8. What is the composition and function of polarizer?

A: This is a sandwich filter, which consists of two pieces of glass bonded together and wrapped with a layer of ethylene film with tiny crystals in the same direction.

Reduce the brightness of the sky. A lot of light projected from the sky is polarized light, which can be stopped by a polarizer. When the shooting lens makes a 90-degree angle with the direction of the sun, the degree of reduction is the greatest.

Second, control the reflection of non-metallic objects. Because the reflection from the metal surface is not polarized light. The limitation of shooting with a polarizer requires that the incident angle of the beam should be between 30 degrees and 49 degrees, and shooting should be taken from the position of reflection angle. It is also useless to reflect the front of the glass with a polarizer.

Third, it can replace the medium gray color filter. It is also variable to adjust the vibration angle of polarized light by combining two mirrors.

Fourth, enhance the saturation of color. Avoiding glare caused by reflection of smooth objects can increase color saturation.

9. How does portrait photography eliminate the reflection on glasses?

A: Change the shooting position or direction of people outdoors.

The indoor main light is higher. The auxiliary light should not be placed on the front, and the light should be soft and slightly dark. If the front must be used up, you can turn your head slightly left and right, or adjust the shooting angle slightly. Lift the plane. Use reflected light as the main light source. Avoid bright reflectors as much as possible.

10. Because of the close combination of digital camera and computer, it has advantages over traditional camera. What are the advantages? What are the advantages of having examples?

A: First, the imaging speed is fast, and it has the function of instant shooting.

Second, there are many intermediate links when modifying photos.

Large amount of information, easy retrieval, high copy quality and good storage performance.

Connect directly to the computer and use software to process and store pictures.

Short answer to nouns:

1, depth of field:

A: When the lens focuses on a scene, the scene within a certain distance before and after the scene can also form a clearer image on the focal plane. The vertical and vertical depth of this image is called depth of field.

2. What are the characteristics of overexposed and overexposed films?

Answer: The density of the whole film is very high, and there is no most transparent place on the film. No texture can be seen in the maximum density part, and the shadow line in the minimum density part is not clear. The maximum density is about 2,03, and the minimum density is about 0,90.

3. What are the characteristics of underexposed and underexposed films?

A: The whole negative is very transparent, and the maximum density part is also very thin. The minimum density is the same as the smog, and no shadow lines can be seen. The maximum density is about 0 and 72, and the minimum density is about 0 and 12. Remedy: Choose thickening agent or No.3 and No.4 photographic paper when printing.

4. What is sidelight? What role does it play in photographic works?

A: Side light refers to the light that can outline the shape of the object on the subject, usually brighter than the background and brighter than the main light.

Function: It is used to outline the subject, so that the subject is separated from the background in lightness, so that the subject has a clear outline and creates a poetic artistic conception and aesthetic feeling for the picture. It also plays an important role in strengthening the three-dimensional sense of the image.

5, the main characteristics of black and white film:

Answer: Color sensitivity and grain contrast.

6. The relationship between viewing angle and focal length:

A: The viewing angle of a photographic lens mainly depends on the focal length and the diagonal length of the negative. If the diagonal length of the negative is fixed, it depends entirely on the length of the focal length. The longer the focal length, the smaller the viewing angle; The shorter the focal length, the larger the viewing angle.

7. What are the two main functions of the shutter?

Answer: control the film exposure time; Controls the sharpness of the subject.

8. What is the function of range hood?

A: It's an accessory worn in front of the camera lens. Prevent diffuse light and strong oblique (straight) light from entering the lens, so as to avoid glare and fog on the negative film, which will affect the contrast and clarity of the image.

9. Briefly answer the types of membranes with different specifications:

Answer: 135 tablets, 120 tablets,10 tablets, 126 tablets.

10, how to save the movie:

Answer: Keep it in a cool, dry and ventilated place to prevent it from getting wet or overheating. The relative humidity is about 40%, and the temperature is below 10 degree.

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