On the Basic Knowledge of Photography

First, multiple-choice questions (this topic is entitled * * 10, with 2 points for each question and 20 points for * * *).

Of the four options listed in each question, only one meets the requirements of the topic. Please fill in the code in brackets after the title. Wrong selection, multiple selection or no selection will not be scored.

1. In the theory of area exposure, _ _ _ should be 18% of the density that a reflecting object should produce. ( )

A. Level 3 B. Level 5

C. Level 7 D. Level 9

2. The relationship between the GN value of the flash and the aperture and illumination distance of the camera is ()

A.GN = L \f B

C.GN=L×F D

3. The "light ratio" in photographic exposure refers to ()

A. ratio of main light to auxiliary light B. ratio of side light to front light

C. Ratio of smooth light to backlight D. Ratio of top light to bottom light

4. In the exposure mode of the camera, the symbol of manual exposure is ().

A." S " B. " A "

C.M d P。

5. The acceptance angle of ordinary exposure meter when measuring brightness is between 30-45 degrees, which is basically consistent with the viewing angle of _ _ _ _.

( )

A. Fisheye lens B. Wide-angle lens

C. standard lens D. telephoto lens

6. The average reflectivity of Asian yellow skin is about ().

A. 18% B.25%~30%

12.5% D.50%

7. Only a small area in the center of the picture is measured, and the measuring range is about 1%~3% of the picture, which is called ().

A. Average measurement B. Central key measurement

C. Partial measurement D. Point measurement

8. When using an exposure meter, you should avoid measuring dark light immediately after measuring strong light, because its photosensitive element is ().

A. Cadmium sulfide B. Photocell

C. Potassium arsenic phosphate D. Blue silicon

9. Illuminance and reflection characteristics of the photographed scene surface ()

A. in direct proportion

C. inverse square D. irrelevant

10. Among the following options, the one that cannot represent 5.6 aperture is ().

A.F5.6 B.ISO5.6

C.f/5.6 D.N=5.6 seconds, fill in the blanks (this big question * * 10 is a small question, each space is 1, and * * 14).

Please fill in the correct answers in the blanks of each question. You don't score if you fill it wrong or not.

1. Sensitivity can be expressed in two ways: one is _ _ _ _ _ _ _, which is the expression of the arithmetic value of perceived luminosity; One is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

2. The size of the aperture is expressed by the number of f, and the smaller the value of f, it means that the aperture is _ _ _ _ _ _ _ _ _ _ _, and the stronger the light entering the camera lens.

3. The amount of light per unit area of photosensitive material is called the amount of light per unit area of _ _ _ _ _ _ _ _ _ _.

4. The brightness of the scene is determined by the illuminance and the _ _ _ _ _ _ _ _ _ * * of the scene.

5. The function of the _ _ _ _ _ _ _ _ circuit in the electronic exposure meter is to convert the optical signal received by the exposure meter into a digital signal that can be processed by the computer.

6. The exposure meter should remove _ _ _ _ _ _ _ _ _ _ _ when measuring brightness.

7. The camera has two metering modes, namely _ _ _ _ _ _ _ _ _ _ and internal metering, among which internal metering is also called _ _ _ _ _ _ _ _ _ (also called TTL metering).

8. Illumination measurement is to measure the light projected on the shooting scene, so when in use, align the photosensitive probe of the exposure meter from _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

9. In the area exposure theory, _ _ _ _ _ _ _ _ _ _ _ _ refers to

10. The average reflectivity of natural scenery is about _ _ _ _ _ _ _ _ _ _ _. Three. Noun explanation (this big title is ***4 small questions, 3 points for each small question, *** 12 points)

1. Aperture priority mode

2. Brightness balance of the scene

3. Shadow exposure mode

4. Reciprocity Rule 4. Short answer (this big question is ***4 small questions, each with 6 points and * * * 24 points).

1. What is the step exposure method? What's the role?

What are the advantages of 2.2? TTL-OTF flash automatic control?

3. What are the advantages of blue silicon photodiode?

4. What is the normal tone? V. Essay questions (this topic is entitled ***2 small questions, each small question 15 points, ***30 points).

1. Talk about the adjustment method of black-and-white film contrast.

2. Try to describe several common exposure modes of modern cameras and their characteristics.