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Aesthetics > Photography > Flashcards

Flashcards in Photography Deck (26):
1

The angle that the lens sees

Angle of View

2

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

Aperture

3

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

  • Reduces
  • Increases

4

Distance between focal point and the lens plane

focal length

5

Lenses with shorter focal length are called

Macro Lenses 

6

The distance between the object and front of the lens 

Working Distance

7

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

  • Hygiene Problem
  • Patient Discomfort
  • Image Distortion

8

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

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

9

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

Depth of field

10

What does the depth of field depend on?

Aperture

11

What are 3 advantages to a Ring Flash?

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

12

What are 2 disadvantages to Ring Flashes?

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

13

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

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

14

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

darker or underexposed image

15

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

too light or over exposed image

16

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

  • Reduce aperture 

                 OR

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

17

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

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

18

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

very flat (not recommended for Portrait and Object Photography)

19

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

Controlling the depth of field by pre setting the aperture

20

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

Aperture and Exposure time (shutter speed)

21

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

Lateral View

22

What are the Standard Views?

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

23

What is the frontal view of the arch useful for?

Prosthetic and Periodontal Purpose

24

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

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

25

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

Perpendicular to the mirror image

26