Unit 3- Shutter & aperture, ISO & WB Flashcards

1
Q

why does the shutter open during an exposure

A

the shutter opens during an exposure so light can expose the image sensor

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2
Q

what is the effect of a slower shutter speed

A

image gets lighter

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3
Q

what is the effect of a faster shutter speed

A

lets less light strike the image sensor so the image is darker

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4
Q

explain the effect of a longer shutter length on motion

A

the more a moving subject will be blurred, also you are more likely to cause blur by moving the camera slightly.

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5
Q

explain the effect of a short shutter length on motion

A

fast shutter speed opens and closes quickly so a moving subject doesn’t move very far during the exposure

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6
Q

how would you change your shutter speed to capture, or freeze, action.

A

the faster the subject is moving the faster the shutter speed must be.

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7
Q

the higher the F-stop # the (more/less) blurred moving action is

A

less

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8
Q

the lower the F-stop # the (more/less) blurred it is

A

more

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9
Q

what are stops

A

shutter speed settings

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10
Q

what are the three types of shutters

A
  • electronic
  • leaf
  • focal plane
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11
Q

movement can be effectively conveyed in a photograph which can reveal…….

A

drama and grace that are missed with the naked eye.

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12
Q

in addition to the exact shutter speed, what two other factors influence a sharp and frozen subject

A

its size and distance

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13
Q

what is the backdoor method to attaining fastest shutter speed

A
  • use aperture priority mode
  • select widest available aperture
  • if the speed still doesn’t seem fast enough, increase the ISO setting.
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14
Q

panning is easiest with what kind of lens

A

standard or short telephoto lens

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15
Q

how do you freeze your subject against a blurred background

A

-follow your subject with the camera

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16
Q

how do you blur your subject

A

-hold the camera steady and snap a picture as the subject passes by.

17
Q

how do you create an impressionistic look

A

-pan the camera at a faster or slower shutter speed the the moving subject

18
Q

what does ISO sensitivity do

A

governs the sensors response to greater or lesser amounts of light.

19
Q

at higher ISO settings, (more/less) light is needed to capture an acceptable image

A

less

20
Q

when are lower ISO settings useful

A
  • in bright conditions

- when you want to use wide apertures/slow shutter speeds

21
Q

what does auto ISO do

A

sets ISO automatically by default

22
Q

what modes terminate auto ISO

A

P, S, A or M modes

23
Q

do natural and artificial light sources have the same colour

A

no, they can vary in colour

24
Q

what is DOF

A

is the zone -extending both before and behind the point o f focus-in which objects appear to be sharp

25
Q

list the three main factors that affect DOF

A
  • the focal length of lens
  • aperture
  • the distance to the subject
26
Q

whats the simple rule of DOF

A

small aperture=big DOF

big aperture=small DOF

27
Q

what is apparent sharpness

A

refers to the objects appearing to be sharp, how sharp the image appears

28
Q

what is hyperfocal distance

A

the closest distance at which a lens can be focused while keeping objects sharp

29
Q

what is the “one third” focus rule

A

is to focus one third of the way into the photo

30
Q

a higher ISO reacts (quickly/slowly) to light

A

quickly

31
Q

a lower ISO is (quicker/slower) to react to light

A

slower

32
Q

what kind of tones does incandescent and incandescent white have and how does the camera compensate these tones

A

has yellow, camera adds blue

33
Q

what kind of tones does fluorescent have and how does the camera compensate these tones

A

has green, camera adds red

34
Q

what kind of tones does direct sunlight have and how does the camera compensate these tones

A

has blue, camera adds warm yellow

35
Q

what kind of tones does flash-white have and how does the camera compensate these tones

A

has blue, camera adds warm yellow

36
Q

what kind of tones does cloudy-white have and how does the camera compensate these tones

A

has a little more blue, camera adds warm yellow

37
Q

what kind of tones does shade-white have and how does the camera compensate these tones

A

bluer than cloudy, camera will add more warm yellow