PRACTICE EXERCISE
1.
The point where light rays cross in a lens assembly is referred to as
the ________________________ of a lens.
2.
The ____________________________ is where the image is brought to a
sharp focus at the back of the camera occupied by the film.
3.
The distance from the camera lens where the light rays become parallel
is referred to as _________________________.
4.
The symbol " " on a camera lens indicates that the lens is focused on
what?
______________________________________________________________________
5.
_______________________ is the distance from the optical center of a
lens to the focal plane when the lens is focused on infinity.
6.
The image size on the focal plane is determined by the size of the
subject, the lens to subject distance and the ______________________
of the lens.
7.
What new focal length lens would you select to double the image size
while maintaining the same lens to subject distance? _________________
______________________________________________________________________
8.
A 50mm lens with the subject at fifteen feet would produce the same
image size as a ______mm lens with the subject distance at thirty
feet.
9.
What are the three classifications of photographic lenses? ___________
______________________________________________________________________
______________________________________________________________________
10.
The angle of view will increase as the focal length _________________.
11.
Write in the angle of view in degrees for the below listed lenses.
a.
Wide angle of short focal length = ________________
b.
Normal focal length = ______________________
c.
Telephoto or long focal length = __________________
12.
Name the two dimensions which objects are reproduced on the focal
plane?
______________________________________________________________________
13.
Depth perspective is dependent on what? ______________________________
______________________________________________________________________
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