CHAPTER 4

Question 1

A disc of TRANSFARENT GLASS generally bounded by two spherical surfaces capable of transforming an image

Answer 1

Lens

Question 2

It is the EYE OF THE CAMERA

Answer 2

Lens

Question 3

It is also the HEART OF THE CAMERA

Answer 3

Lens

Question 4

How lens work?

Answer 4

Gather light rays from a subject

Question 5

General Classification of lenses:

Answer 5

Simple lenses
Compound lenses

Question 6

It composed a 1 LENS

Answer 6

Simple lenses

Question 7

Kinds of simple lenses:

Answer 7

Convex lens
Concave lens

Question 8

A lens that is THICKER AT THE MIDDLE THAN AT THE EDGE

Answer 8

Convex lens

Question 9

It gathers light rays and refracts them to MEET IN CERTAIN POINT

Answer 9

Convex lens

Question 10

It is THICKER AT THE EDGE THAN AT THE CENTER

Answer 10

Concave lens

Question 11

It consists of TWO OR MORE SIMPLE LENSES FITTED TOGETHER

Answer 11

Compound lenses

Question 12

This refers to the SIZE OF THE IMAGE PRODUCED BY LENS

Answer 12

Image size

Question 13

This refers to the DISTANCE FROM THE OPTICAL CENTER OF THE LENS to the ______ when the lens is focused on infinity

Answer 13

Focal plane

Question 14

The DISTANCE BETWEEN THE LENS and the focal plane when the lens focused on infinity

Answer 14

Focal length

Question 15

The SIZE OF THE IMAGE FORMED BY LENS

Answer 15

Magnification

Question 16

The AMOUNT OF THE SCENE shown on a given size of film

Answer 16

Angle view

Question 17

Shows the subject in a way that is SIMILAR TO THE IMAGE SEEN BY NAKED EYE

Answer 17

Normal lens

Question 18

The angle of view is 45 DEGREES TO 60 DEGREES

Answer 18

Normal lens

Question 19

It has a SHORTER FOCAL LENGTH THAN the normal lens

Answer 19

Short focal lens

Question 20

It covers a picture angle of 60 TO 90 DEGREES

Answer 20

Short focal lens

Question 21

A lens with EXTREME WIDE ANGLE

Answer 21

Fish eye lens

Question 22

It provides a FIELD OF VIEW OF 180 DEGREES MORE

Answer 22

Fish eye lens

Question 23

It provides an ENLARGED IMAGE OF AN OBJECT

Answer 23

Long or telephoto lens

Question 24

It allows you to TAKE CLOSE UP SHOTS WHILE KEEPING YOUR DISTANCE

Answer 24

Long or telephoto lens

Question 25

The angle of view is LESS THAM 45 DEGREES

Answer 25

Long or telephoto lens

Question 26

A special type of camera which CAN BE ADJUSTED CONTINUOUSLY BY THE MOVEMENT of the variable focus lens

Answer 26

Zoom lens

Question 27

This lens ALLOWS QUICK ADJUSTMENT TO GIVE A WIDER OR NARROW FIELD of vision but keeping the image im focus

Answer 27

Zoom lens

Question 28

It is the FAILURE OF LIGHT RAYS TO FOCUS PROPERLY after they pass through a lens or reflect from a mirror

Answer 28

Aberration

Question 29

The FAILURE OF DIFFERENT COLORED LIGHT RAYS to focus after passing through a lens

Answer 29

Chromatic aberration

Question 30

The inability of the len to BRING HORIZONTAL AND VERTICAL LINES in the subject to the same plane of focus in the image

Answer 30

Astigmatism

Question 31

A SPOT OF LIGHT APPEARS TO HAVE A TAIL rather like a comet

Answer 31

Coma

Question 32

The plane of SHARPEST FOCUS BECOMES CURVED NOT FLAT

Answer 32

Curvature of field

Question 33

It CAUSES THE IMAGE OF A STRAIGHT LINEVat the edges of the field to bow in or out

Answer 33

Distortion

Question 34

Types of distortion:

Answer 34

Pincushion distortion Barrel distortion

Question 35

A result of DOUBLE REFLECTION from inner lens surfaces

Answer 35

Flare or optical flare

Question 36

It exhibits self as a MISTY HAZY OR CLOUDY SEMI CIRCULAR path of light

Answer 36

Flare or optical flare