Upgrade to remove ads
ap photo test
Terms in this set (52)
What is a camera obscura?
how does you eye work exactly like a camera?
light enters the eye through the cornea, the clear front "window" of the eye. the corneas refractive power bends the light rays so they pass freely through the pupil, the opening in the center of the eye iris, which acts like a shutter in a camera.
what does ISO stand for?
International Organization of Standardization
How is ISO related to photography?
in digital photography, ISO measure the sensitivity of the image sensor. the same principle applies to film photography - the lower the number, the less sensitive your camera is to light and the finer the grain is
How do you adjust ISO on a camera?
click on ISO button and use arrows to select
when do you use high ISO settings and when do you use low ISO settings (generally)?
high - more sensitive to light so in lower light settings
low - less sensitive to light so in brighter settings
how do ISO settings affect the quality of an image?
high ISO - more grainy/noisy
low ISO - less grainy/noisy
why is ISO so important?
designates the films degree of sensitivity to light
what is a stop in relation to photography?
a change in exposure setting, either aperture or shutter speed, that either doubles or halves exposure
what is an exposure in photography?
a combined effect of volume light hitting the film or sensor and its duration
- controlled by the aperture
- duration is controlled by the shutter speed
what does the light meter do in a camera? do you know how to use it manually?
tells you how much light is being allowed into the camera based on the current APERTURE, SHUTTER SPEED, and ISO SETTINGS
what is 18% gray? why is this important in photography?
the tone or value to which all light meters average the light given off by the scene which is being photographed
halfway between black and white
what is meant by "equivalent exposure"?
denotes all combinations of shutter speed and relative aperture settings that give the same amount of light striking the light sensitive surface
- exposes image properly
what is exposure compensation?
good to use for backlit subjects or other subjects that may be brighter or darker than a "normally" lit subject
when a subject is backlit, how do you control exposure to get a silhouette?
set exposure on the background?
in the same circumstances, how do you control exposure to get the shadow detail to come out on the subject?
set exposure on subject?
what is "bracketing" in relation to photography? why is it important to know how to do this?
shooting the same scene at different stop settings to get different amounts of exposure
what is shutter speed?
numbers represent fractions like f/stop numbers do when displayed on the camera
what does shutter speed control?
duration of an exposure
why is 1000 a faster shutter speed than 60? what do the numbers 1000 and 60 actually represent?
because they're fractions
1/1000 and 1/60
what is freeze motion?
captures a moving subject with the background and subject in focus
what is pan motion?
captures a moving object with subject in focus and background blurred
what is blur motion?
captures a movie object with background in focus and subject blurred
what is a good shutter speed to freeze most forms of motion?
what shutter speed is ideal for shooting pan and blur motion?
at what shutter speed does it start to be too slow to shoot without a tripod (otherwise you risk getting blurred images from camera shake)?
anything lower than 1/60
what is the aperture on a camera?
opening of a lens through which light passes
What does aperture control?
openings size during exposure
depth of field
f/4 is a larger f-stop opening than f/22. why is this? what do these numbers actually represent?
because f/4 is faster and can allow more light in whereas f/22 is slower
actually represents the ratio between the focal length of the lens and the diameter of the elements in it
what is depth of field?
the zone of sharpness variable by aperture, focal length, or subject distance
how does the aperture control depth of field?
Large (f/2) apertures create a shallow depth of field and small apertures (f/22) create a deep depth of field
what is meant by a shallow depth of field?
that the subject closer to the camera is in focus
which would give you a larger depth of field: f/4 or f/22?
why would you want a shallow depth of field?
what is white balance?
a function of a digital camera used to compensate for different colors of light being emitted by different light sources
why is it important to know about this as a photographer?
to correctly display the color white or other colors as well
how do you adjust white balance on your camera?
select "AWB" and choose any other white balance selections
what is a JPEG (JPG)?
Joint Photographic Experts Group
compressed files (take up less space)
What is a TIFF?
Tagged Image File Format
much larger file (not compressed)
what is a PSD?
what is a RAW file?
massive and hold most info
cannot set white balance on RAW
files cannot be opened without certain software
pros use RAW because better quality and white balance is not an issue
how do you change from the RAW setting on the camera to the JPEG setting on a camera?
select the quality type and choose either RAW or the L, M, or S
when shooting on JPEG, why is it generally best that you have your camera set to L (large JPG)?
to hold more information and have a more detailed image
what is manual mode (M)?
where you can adjust everything such as aperture, iso, and shutter
what is aperture priority mode or aperture value mode (A or Av)? They are the same thing, manufacturers use different names.
you set aperture, camera sets the shutter speed
most helpful to use when depth of field is most critical
what is shutter priority mode or time value mode (S or Tv)?
you set shutter speed, camera sets the shutter speed
best to shoot when visible motion is most critical in your composition
what is program mode (P)?
automatically adjust shutter speed and aperture
what is auto mode (A or a green circle)?
allows the photographer to focus more on the art rather than on the technology
What is the DPI of a digital image?
dots per inch
what is the resolution of an image?
detail an image holds
what is the relationship between the inches dimensions and resolution of an image? (ie. if the resolution of an image goes up, what happens to the inches size of the image?)
higher the inch the higher the resolution?
to print an image without too much pixelation, a file should be at least what dpi in its resolution?
YOU MIGHT ALSO LIKE...
Digital Photography - Terms
OTHER SETS BY THIS CREATOR
sports med final
ap gov unit 6
literary terms for poetry