Unit 3- Shutter & aperture, ISO & WB Flashcards
why does the shutter open during an exposure
the shutter opens during an exposure so light can expose the image sensor
what is the effect of a slower shutter speed
image gets lighter
what is the effect of a faster shutter speed
lets less light strike the image sensor so the image is darker
explain the effect of a longer shutter length on motion
the more a moving subject will be blurred, also you are more likely to cause blur by moving the camera slightly.
explain the effect of a short shutter length on motion
fast shutter speed opens and closes quickly so a moving subject doesn’t move very far during the exposure
how would you change your shutter speed to capture, or freeze, action.
the faster the subject is moving the faster the shutter speed must be.
the higher the F-stop # the (more/less) blurred moving action is
less
the lower the F-stop # the (more/less) blurred it is
more
what are stops
shutter speed settings
what are the three types of shutters
- electronic
- leaf
- focal plane
movement can be effectively conveyed in a photograph which can reveal…….
drama and grace that are missed with the naked eye.
in addition to the exact shutter speed, what two other factors influence a sharp and frozen subject
its size and distance
what is the backdoor method to attaining fastest shutter speed
- use aperture priority mode
- select widest available aperture
- if the speed still doesn’t seem fast enough, increase the ISO setting.
panning is easiest with what kind of lens
standard or short telephoto lens
how do you freeze your subject against a blurred background
-follow your subject with the camera
how do you blur your subject
-hold the camera steady and snap a picture as the subject passes by.
how do you create an impressionistic look
-pan the camera at a faster or slower shutter speed the the moving subject
what does ISO sensitivity do
governs the sensors response to greater or lesser amounts of light.
at higher ISO settings, (more/less) light is needed to capture an acceptable image
less
when are lower ISO settings useful
- in bright conditions
- when you want to use wide apertures/slow shutter speeds
what does auto ISO do
sets ISO automatically by default
what modes terminate auto ISO
P, S, A or M modes
do natural and artificial light sources have the same colour
no, they can vary in colour
what is DOF
is the zone -extending both before and behind the point o f focus-in which objects appear to be sharp
list the three main factors that affect DOF
- the focal length of lens
- aperture
- the distance to the subject
whats the simple rule of DOF
small aperture=big DOF
big aperture=small DOF
what is apparent sharpness
refers to the objects appearing to be sharp, how sharp the image appears
what is hyperfocal distance
the closest distance at which a lens can be focused while keeping objects sharp
what is the “one third” focus rule
is to focus one third of the way into the photo
a higher ISO reacts (quickly/slowly) to light
quickly
a lower ISO is (quicker/slower) to react to light
slower
what kind of tones does incandescent and incandescent white have and how does the camera compensate these tones
has yellow, camera adds blue
what kind of tones does fluorescent have and how does the camera compensate these tones
has green, camera adds red
what kind of tones does direct sunlight have and how does the camera compensate these tones
has blue, camera adds warm yellow
what kind of tones does flash-white have and how does the camera compensate these tones
has blue, camera adds warm yellow
what kind of tones does cloudy-white have and how does the camera compensate these tones
has a little more blue, camera adds warm yellow
what kind of tones does shade-white have and how does the camera compensate these tones
bluer than cloudy, camera will add more warm yellow
