Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

LENS > Lens > Flashcards

Lens Flashcards

1
Q

The eye of the camera is also a heart of the camera

A

Lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A piece of transparent material made of glass or plastic with 2 opposite symmetrical surface or at least one curved surface

A

Lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

General classification of lenses

A
  1. Simple lenses
  2. Compound lenses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

It composed of 1 lens

A

Simple lenses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A lens that is thicker at the middle than at the edge

A

Convex Lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

It gathers light rays and refracts them to meet in a certain point

A

Convex Lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

It is thicker at the edges than at the center; light rays passing through a diverging lens are vent outward

A

Concave Lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

It consists of two or more simple lenses fitted together

A

Compound lenses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Produce aberrated image which can be corrected using compound lenses

A

Simple lenses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

It Is a combination of lenses

A

Compound lenses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

It is a number of mega fixel

A

Image size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Image produced by the lens depends upon factors camera- to - subject and focal length

A

Image size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Small circle or blur are called?

A

Circle of confusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Refers to the distance from the optical center of the lens to the focal plane, when the lens is focused on infinity

A

Focal plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The distance between the lens and the focal plane when the lens is focused on infinity

A

Focal length

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Focal length controls the following:

A

a. Magnification
b. Angle of view

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The size of the image formed by the Lens

A

Magnification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The amount of the scene shown on a given size of film

A

Angle of view

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

A lens with a focal length equal to the diagonal measure of the image area

A

Standard or normal lens

20
Q

By international standards, 50 mm

A

Standard or normal lens

21
Q

Lenses with focal lengths from 45 to 60 millimeters are normal lenses because they produce an image that is approximately the same with the view angle of the human eye which is 45 degrees

A

Standard or normal lens

22
Q

Groups of lenses according to focal length and characteristics

A
  1. Standard or Normal lens
  2. Short- focal - lens or wide angles lens
  3. Fish eye lens
  4. Long or Telephoto lens or Narrow angle
  5. Zoom lens
  6. Macro lenses
23
Q

It has a shorter focal length than the normal lens. Hens it covers a picture angle of 60 to 90 degrees.

A

Short- focal -lens or wide angles lens

24
Q

A lens with extreme wide angle

A

Fish Eye Lens

25
Q

It provides a field of view of 180 degrees or more

A

Fish eye lens

26
Q

A6- millimeters fish-eye lens made by Nikon has a ____ degree field of view

A

220

27
Q

Provides an enlarged image of an object

A

Long of telephoto lens or Narrow lens

28
Q

Lens with longer focal length that constrict the field of view and decrease the depth of field while greatly magnifying the image. e.g. 85mm, 100mm, 200mm, 300mm etc.

A

Long or telephoto lens or Narrow lens

29
Q

Allows you to take close – up shots while keeping your distance (reach out like telescope) to provide greatly enlarged of a distant object.

A

Long or telephoto lens or Narrow lens

30
Q

Provides shallow dept of field.

A

Long or telephoto lens or Narrow lens

31
Q

Angle of view is less than 45 degrees

A

Long or telephoto lens or Narrow lens

32
Q

This lens allows quick adjustment to give a wider or narrower field of vision but keeping the image in focus.
e.g. 24mm – 135mm

A

Zoom lens

33
Q

A special type of camera lens with variable focal length which can be adjusted continuously by the movement of the variable focus lens.

A

Zoom lens

34
Q

The failure of light rays to focus properly after they pass through a lens or reflect from a mirror.

A

Aberration

35
Q

The focusing at different points of light rays passing through different parts of spherical lens.

A

Spherical aberration

36
Q

The failure of different colored light rays to focus after passing through a lens.

A

Chromatic aberration

37
Q

The focusing of light of different colors at different points resulting in a blurred image.

A

Chromatic aberration

38
Q

occurs at the edge of the image; the image appears elliptical or cross-shaped because of an irregularity in the curvature of the lens.

A

Astigmatism

39
Q

The inability of the lens to bring horizontal and vertical lines in the subject to the same plane of focus in the image.

A

Astigmatism

40
Q

It occurs when light falling obliquely on the lens and passing through different circular zones is brought to a focus at different distances from the film plane.

A

Coma

41
Q

A spot of light appears to have a tail, rather like a comet.

A

Coma

42
Q

The plane of sharpest focus becomes curved, not flat

A

Curvature of field

43
Q

It is caused by rays from the outer limits of the subject plane coming to focus nearer to the lens than the axial rays

A

Curvature of field

44
Q

Allows photographer to get close to the subject without need of special closed up attachment

A

Macro lenses

45
Q

Lens defects

A
  1. Spherical aberration
  2. Chromatic aberration
  3. Astigmatism
  4. Coma
  5. Curvature of field
  6. Distortion
46
Q

Cause the image of straight line at the edge of field to bow in or out

A

Distortion

47
Q

Other lens defects

A
  1. Flare or Optical Flair
  2. Mechanical Flair
  3. Light loss
  4. Stray light

LENS (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions