Photography

Question 1

The angle that the lens sees

Answer 1

Angle of View

Question 2

Opening in the lens that regulates the amount of light (iris)

Answer 2

Aperture

Question 3

Stopping down the aperture … the amount of light (brightness) and … the sharpness (depth of field).

Answer 3

• Reduces
• Increases

Question 4

Distance between focal point and the lens plane

Answer 4

focal length

Question 5

Lenses with shorter focal length are called

Answer 5

Macro Lenses

Question 6

The distance between the object and front of the lens

Answer 6

Working Distance

Question 7

What does too short of a working distance have some influence on?

Answer 7

• Hygiene Problem
• Patient Discomfort
• Image Distortion

Question 8

How does a working distance that is too far affect the image?

Answer 8

• More items will appear in the frame
• Distrub the point of focus

Question 9

The distance from the nearest to the furthest point of sharp focus

Answer 9

Depth of field

Question 10

What does the depth of field depend on?

Answer 10

Aperture

Question 11

What are 3 advantages to a Ring Flash?

Answer 11

1. Light surrounds the optical axis
2. In accessible objects in oral cavities will all be lit evenly
3. Natural color rendition

Question 12

What are 2 disadvantages to Ring Flashes?

Answer 12

1. Produces images without shadows (which are needed to create a 3D effect)
2. Images tend to look flat

Question 13

What does the high intensity of light from a twin flash system result in?

Answer 13

narrowing down the lens opening and therefor increases the depth of field

Question 14

When taking a photograph of bright surfaces, images will tend to be…

Answer 14

darker or underexposed image

Question 15

When taking a photograph of dark surfaces, images will tend to be…

Answer 15

too light or over exposed image

Question 16

What corrections on the camera settings are needed to compensate for the flash exposure of dark objects?

Answer 16

• Reduce aperture

OR

• Preset the exposure compensation in the camera to the negative value

Question 17

What corrections on the camera settings are needed to compensate for the flash exposure of bright objects?

Answer 17

• Manually increase aperture
• Adjust the exposure set up in the camera to a positive value

Question 18

If light comes parallel to the optical axis (ring flash), what will be the effect on illumination?

Answer 18

very flat (not recommended for Portrait and Object Photography)

Question 19

What is the advantage of Aperture Priority (A) Mode?

Answer 19

Controlling the depth of field by pre setting the aperture

Question 20

What does Manual Mode (M) preset on the camera?

Answer 20

Aperture and Exposure time (shutter speed)

Question 21

What view is recommended for orthodontic, periodontal and prosthetic documentaion?

Answer 21

Lateral View

Question 22

What are the Standard Views?

Answer 22

• Frontal View (both arches)
• Lateral View
• Occlusal Mandibular View
• Occlusal Maxillary View

Question 23

What is the frontal view of the arch useful for?

Answer 23

Prosthetic and Periodontal Purpose

Question 24

What is the lateral view of the front teeth mainly used for?

Answer 24

Anterior teeth together to verify the bite for prosthetic and orthodontic purposes

Question 25

When using a mirror to take a lateral view of posterior teeth, the optical access should be?

Answer 25

Perpendicular to the mirror image