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3-11.
Which of the following focal-length
3-17.
Stopping down a lens increases
lenses used at a given f/stop and
lens-to-film distance provides the
greatest selective focus affect?
1.
1000mm
2.
400mm
3.
135mm
4.
50mm
3-12.
Which of the following factors
does NOT affect depth of field?
1.
f/stop
2.
Lens focal length
3.
Shutter speed
4.
Subject distance
Learning Objective:
Identify
purpose and effects of the camera
aperture.
3-13.
Which of the following camera
controls affects the intensity of
light falling on the film plane?
1.
Shutter
2.
Aperture
3.
Intensity compensator
4.
Preview actuator
3-14.
What is the most important factor
in controlling depth of field?
1.
Shutter speed
2.
Subject distance
3.
Lens focal length
4.
f/stop
3-15.
With a given camera and all camera
controls remaining constant, what
subject distance, in feet, results
in the greatest depth of field?
1. 30
2. 20
3. 10
4. 5
3-16.
What area of a lens produces
the sharpest image?
1.
The central part
2.
The outer edges
3.
Either 1 or 2 above
depth of field.
In what way,
if any, does this action affect
image sharpness?
1.
It increases overall image
sharpness
2.
It decreases overall image
sharpness
3.
None
3-18.
The optimum or critical aperture
of a lens is generally at what
f/stop setting?
1.
Wide open
2.
Two f/stops
from wide open
3.
f/11
4.
f/32
Learning Objective:
Identify
purpose and effects of the camera
shutter.
3-19.
What is the primary function
of a camera shutter?
1.
To limit the intensity
of light emitted to the film
2.
To control the quality of light
passed to the film
3.
To regulate the amount of time
that light is permitted to act
on the film
4.
To stop image motion by
limiting the frequency
of wave motion permitted to
pass through the lens
3-20.
Which of the following shutter
speeds can be used when a leaf
shutter is used with an electronic
flash?
1.
1/30 second
2.
1/125 second
3.
1/500 second
4.
Each of the above
18

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