Unit 2- camera controls, exposure, focus Flashcards
By controlling how much light reaches your sensor you:
Control how much light or dark the picture is
What does perfect exposure do
It retains details in both the highlights and shadows
What happens when there is not enough exposure
The image is too dark and details are lost in the shadows
What happens if there is too much exposure
The image becomes too light and details are lost in the highlights
What is one way to ensure you get the best exposure?
Take three pictures, this procedure is called bracketing #1 picture- at the recommended setting #2 picture-lighter than first #3-darker than the first
Why are shutter and aperture are the most important controls on your camera
They both affect the total amount of light reaching the image sensor
Explain the effect of less light and more light on an image
Less light makes an image darker and more light makes it lighter
Why are you given so many choices when it comes to shutter and aperature
It gives you creative control
Explain the effect of a small aperture in depth of field and how it alters the image
A small aperture increases depth of field so foreground and background are sharp
Explain the effect of a fast and slow shutter speeds and how they alter the images
A fast shutter speed freezes your subject and a slow shutter speed blurs it
What is aperture
the diameter of the hole through which light enters the camera
What is depth of field
the zone of acceptable sharpness within a photo that will appear in focus.
How does shutter speed effect exposure
if the shutter speed is too fast, you’ll get an underexposed or too-dark image; if it’s too slow you’ll get on overexposed or too-bright image.
How does aperture effect exposure
Smaller apertures let in less light
Larger apertures let in more light
How is exposure controlled
Aperture, shutter, iso
How is shutter speed expressed
Shutter speeds are measured in seconds, or fractions of a second. For example, a shutter speed of 1/100 means 1/100th of a second, or 0.01 seconds. This is also known as the “exposure time”, because it’s the amount of time the sensor is exposed to
What are the types of shutters
- electronic shutters
- mechanical shutters (leaf shutter) (focal plane shutter)
What affects the dof
aperture (f-stop), distance from the subject to the camera, and focal length of the lens on your camera.
What is the rule of dof
The lower your f-number, the smaller your depth of field. Likewise, the higher your f-number, the larger your depth of field.
What is hyperfocal distance
The hyperfocal distance is the closest distance at which a lens can be focused while keeping objects at infinity acceptably sharp.
What are the modes on the mode dial
Auto, flash – off, portrait, landscape, child, sports, close-up, Night portrait mode
What are the priority modes
Aperture priority mode
Manual mode
Shutter priority mode
Priority mode
What are the focus modes
Af-a
Af-s
Af-c
Mf
What does at-a do
Automatically focus on your subject
