Introduction to Photography

Question 1

What is focal length?

Answer 1

The distance between the lens and image sensor when the subject is in sharp focus

Question 2

What is focal length measured in?

Answer 2

mm

Question 3

What does focal length affect? (3)

Answer 3

Perspective
Depth of field
Field of view

Question 4

What is depth of field?

Answer 4

How much within the image is in focus

Question 5

What is field of view?

Answer 5

How much you can get in the picture

Question 6

What does the size of the focal length indicate?

Answer 6

Shorter focal length = wider field of view and lower magnification
Longer focal length = narrower field of view and higher magnification

Question 7

What does proper exposure mean?

Answer 7

Recording a full scale of tones, from detail in the dark areas through to the brightest parts of the image

Question 8

How can exposure be controlled?

Answer 8

Through aperture and shutter speed

Question 9

What are histograms?

Answer 9

Graphical representations of the pixels exposed in your image

Question 10

What does the left side of a histogram represent?

Answer 10

Blacks/shadows

Question 11

What does the right side of a histogram represent?

Answer 11

Whites/lights

Question 12

What does the middle section of a histogram represent?

Answer 12

Mid-tones or greys

Question 13

What is ISO?

Answer 13

Each pixel in digital photography has a fixed sensitivity to light and is measured in ISO

Question 14

What happens when sensitivity of an image is increaseD?

Answer 14

Increased background noise, resulting in a grainy look

Question 15

What is the range of ISO to be used for indoor photography?

Answer 15

400-800

Question 16

What is the maximum ISO to be used outdoors in sunny conditions?

Answer 16

100

Question 17

What is the aperture?

Answer 17

“Lens diaphragm”
Size of the opening in a camera lens

Question 18

What does the aperture regulate?

Answer 18

The amount of light that passes through the lens and onto the sensor

Question 19

What can the function of the aperture be compared to?

Answer 19

Function of pupil

Question 20

What is aperture control expressed in?

Answer 20

f-stops

Question 21

What does each f-stop due to the light passing through?

Answer 21

Changes the amount of light by a factor of two

Question 22

What does a larger aperture/lower f-number allow?

Answer 22

More light to enter the camera

Question 23

How does aperture affect DOF?

Answer 23

Lower f-number = more shallow depth of field

Question 24

What are the appropriate f-numbers for crime scene photography?

Answer 24

f/8, f/11

Question 25

What is considered an acceptable DOF?

Answer 25

1/3 in front of the subject and 2/3 behind

Question 26

In what three conditions does the greatest DOF occur?

Answer 26

High f-number
Short focal length
Distant subject

Question 27

What is a shutter?

Answer 27

Device that controls the length of time light is allowed to travel to the image sensor

Question 28

What is B shutter speed?

Answer 28

Stands for ‘Bulb’
Holds the camera shutter open until the shutter trigger is released

Question 29

What is the minimum shutter speed for handheld use?

Answer 29

1/60

Question 30

At what shutter speeds must a tripod be used?

Answer 30

Slower than 1/60

Question 31

How is minimum shutter speed related to focal length?

Answer 31

Minimum shutter speed reciprocal of the maximum focal length available to that lens (1/focal length = shutter speed_

Question 32

What is the rule of reciprocity?

Answer 32

If you increase the time (shutter speed) then you must reduce the amount o light (focal length)