Video Cameras The Basics

Question 1

Zoom Ratio

Answer 1

Focal length range of variable focal length lens

Question 2

Telephoto

Answer 2

Lens that has a narrow angle of acceptance

Question 3

Wide-angle

Answer 3

Lens that has a great angle of acceptance

Question 4

Prime

Answer 4

A high quality, fixed focal length lens used in HDTV and film is called a ___ lens

Question 5

Focal length

Answer 5

Distance between optical center of lens and target

Question 6

Zoom

Answer 6

Variable focal length lens is called a __ lends

Question 7

A telephoto lens used at a great distance

Answer 7

In the “case of the wandering billboards” the photographer who wanted to make the signs look close together chose

Question 8

Exaggerate distances and increase apparent speed

Answer 8

A short focal length lens tends to

Question 9

Compress distances and reduce apparent along the lens axis

Answer 9

A long focal length lens tends to

Question 10

Camera-to-subject distance

Answer 10

Spatial relationship differences that seem to accompany wide-angle and telephoto lenses are technically not a function of lens focal length, but

Question 11

A wide-angle lens and positioned himself close to the first sign

Answer 11

In the “case of the wandering billboards” the photographer who wanted to make the signs look far apart used

Question 12

Rack focus

Answer 12

change focus to shift viewer attention from one part of the scene to another
Reduces the amount of light going through lens: moving an iris setting from f:8 to f:16

Question 13

Macro setting

Answer 13

enables the lens to attain sharp focus on an object only a few inches or even a few millimeters from the front of the lens

Question 14

Depth of field

Answer 14

the area along the lens axis that’s acceptably sharp is referred to as

Question 15

Selective focus

Answer 15

term for the process of using limited depth of field to intentionally throw areas of the picture out of focus

Question 16

Increases the amount of light moving through lens

Answer 16

moving an iris setting from f:11 to f:8

Question 17

Lens speed

Answer 17

the maximum amount of light that the lens can transmit is referred to as

Question 18

F stops

Answer 18

the numerical points on a lens relating to the amount of light the lens transmits are called

Question 19

Reduces the amount of light going through lens

Answer 19

moving an iris setting from f:8 to f:16

Question 20

Neutral density (ND) filter

Answer 20

Filter used to control the amount of light passing through a lens

Question 21

Ultraviolet filter

Answer 21

Used primarily to protect the camera lens from adverse conditions encountered in ENG (electronic newsgathering) work

Question 22

Gel

Answer 22

A type of filter that’s much cheaper than a glass filter is the

Question 23

Lens hood

Answer 23

Used to protect a camera image from offending glare or loss of contrast

Question 24

Polarizing filter

Answer 24

Filter that reduces glare and reflections, deepens blue skies, penetrates haze, and intensifies colors

Question 25

Periscope lens

Answer 25

Makes a “bug’s eye view “ of subject matter possible

Question 26

Diffusion filter

Answer 26

Creates a dreamy, soft focus effect

Question 27

Matte box

Answer 27

A small bellows device mounted on the front of the camera

Question 28

1/2 Black Diffusion FX

Answer 28

Filter that is often used to make video look more like film

Question 29

Star filter

Answer 29

Filter that creates “fingers of light” projected out from the sides of shiny objects

Question 30

Optical image stabilizer

Answer 30

originally based on a gyroscopically controlled mechanism that resists short, fast movements by shifting lens elements in the opposite direction

Question 31

Shot box

Answer 31

electronic lens controls that can memorize a series of zoom lens positions, complete with zoom speeds and focus settings

Question 32

C-mount

Answer 32

finely threaded cylinder about 25 mm in diameter that attaches lens to some types of cameras

Question 33

Digital image stabilization

Answer 33

electronically “floats” an active picture frame within a slightly larger target area

Question 34

Rain jacket

Answer 34

protects camera from inclement weather conditions