Deck 3: Optics and Accessory Equipment

Question 1

There are three basic categories of lenses for use in photography: normal lenses, wide-angle lenses, and which of the following?

A) Narrow-angle lenses
B) Telephoto lenses
C) Standard lenses
D) Telegraphic lenses

Answer 1

B

Question 2

In regard to long telelenses, as the angle of view and area of image coverage are narrowed, focal length becomes:

A) Less
B) Greater
C) Reduced by 50%
D) Narrowed

Answer 2

B

Question 3

In regard to "f-numbers," a system denoting the lens aperture, the smaller the f-number, the:

A) Faster the lens
B) Slower the lens
C) Smaller the lens
D) Larger the lens

Answer 3

A

Question 4

Lens mounts come in which two choices?

A) Bayonet and screw thread
B) Optical and narrow bead
C) Skewer and rivet thread
D) Twist focus and screw thread

Question 5

If police want to focus on small items, such as fingerprints, they would most likely use:

A) A telephonic lens
B) A macro lens
C) A micro lens
D) A wide-angle lens

Question 6

One of the most effective filters for photographing blood in black and white is a:

A) Red filter
B) Blue filter
C) Digital parallax filter
D) Iris filter

Question 7

There are a number of different polarizing filters produced by manufacturers, but the two main types are:

A) One produced for night time photography and another for day time photography
B) One used over the camera lens and another used over studio lights
C) One used for wide-angle photos and another for narrow-gauge photography
D) One produced for studio lighting and another for x-ray machines

Question 8

Lens brushes are usually made out of camel hair.

Question 9

Filters are used to change the composition of available light before allowing it to strike the camera sensor.

Question 10

Autofocusing cameras use an infrared sensing module to determine distance of the subject and high-speed motor-driving focusing.

Question 11

A telephoto lens has a shorter focal length and therefore is not effective at providing close-up images of distant objects.

Question 12

Typical uses for the wide-angle lens are for photographing buildings, street scenes, and interiors of homes where a crime has been committed.