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Au 15- Early Clinic > Photography > Flashcards

Photography Flashcards

1
Q

What factors work together to create exposure?

A

aperture
shutter speed
ISO (how sensitive to light)
Lighting

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2
Q

Image sharpness is dependent on the _____ of field, critical _______, and quality/maintenance of the ______.

A

depth
focusing
lens

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3
Q

Does a small or large aperture provide better image sharpness?

A

small

f/22 for intraoral images

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4
Q

What is the “F stop?”

A

a ratio between aperture diameter and lens focal length (a quantitative measure of lens speed)

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5
Q

“Depth of Field” is equivalent to the “Zone of _____ _____”

A

acceptable sharpness

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6
Q

True or False: A large aperture provides a more highly focused image.

A

False

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7
Q

Which has a larger aperture: f22 or f18?

A

f18 (small f stop = large opening)

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8
Q

Which has a smaller aperture: f4 or f1.6?

A

f4 (large f stop = small opening)

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9
Q

A smaller aperture provides less ________ away from the focal plane.

A

divergence

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10
Q

Less divergence from the focal plane provides a ________ depth of field.

A

greater

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11
Q

Which is better for intraoral images: f/5.6 or f/22?

A

f/22

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12
Q

True or False: Mirrors make the subject equidistant to the focal plane and make the aperture size less critical.

A

True (flattens image so that it is in better focus)

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13
Q

_______ depends on megapixels of the camera and on the lens focal length.

A

Magnification

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14
Q

True or False: Megapixels are not important because images can be cropped and zoomed.

A

False

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15
Q

True or False: If a photo is too dark or too light, it can be adjusted without losing detail.

A

True

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16
Q

Focal length is measured in _______.

A

millimeters

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17
Q

The _______ is the sense of depth or spatial relationships between objects in the photo, along with their dimensions with respect to the viewpoint (camera lens or the viewer).

A

perspective

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18
Q

What focal length do we use in clinic to minimize distortion?

A

one-to-one (1:1)

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19
Q

The wide angle lens is ______mm; whereas, the ________ lens is 500mm.

A

28

telephoto

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20
Q

Which is taken from farther away: wide angle or telephoto?

A

telephoto (duh…telescope)

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21
Q

True or False: the head position can mask the real jaw position.

A

True

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22
Q

Illumination is important for what three variables?

A
  1. color temperature
  2. shadows/highlights
  3. modeling effect
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23
Q

What kind of flash do we use in the clinics?

A

“Ring Flash”

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24
Q

What kind of flash do we NOT want to use in clinics?

A

“Point Flash”

25
Q

True or False: Overexposure is better than Underexposure.

A

False…underexposure is better because you can brighten it later

26
Q

True or False: It is better to Under-magnify than Over-Magnify.

A

True

27
Q

What is the priority?

A

sharpness (maximum depth of field through minimum aperture)

28
Q

The camera mode should be set to _____.

A

Av

29
Q

What does “Av” control?

A

the camera’s aperture

30
Q

The button at the top of the camera is called the ______ ______.

A

shutter release

31
Q

The rolling wheel below the shutter release is known as the _____ wheel.

A

control.

32
Q

The limit/full switch should be set to ________ to allow focusing in the mouth.

A

full

33
Q

The AF/M switch works with the camera to allow ______ or _______.

A

manual

autofocus

34
Q

The AF/M switch should be set to ____ for intraoral shots.

A

M

35
Q

The flash has a switch that indicates “Off/On/SE,” what does SE stand for?

A

energy save mode

36
Q

Sharpness and _____ are the two most important factors in quality of dental images because they cannot be adjusted later in photoshop.

A

moisture control

37
Q

What are the three photographic planes?

A

frontal
occlusal
sagittal/para-sagittal

38
Q

How many photos are in the basic series?

A

7

39
Q

What are the five intra-photos in the basic series?

A

Lateral View: #1. Right Buccal and #2. Left Buccal
#3. Frontal View
Occlusal View: #4. Maxillary and #5. Mandibular

40
Q

What are the other two photos?

A 
Extra-Oral:
#6. Frontal Portrait
#7. Profile Portrait
41
Q

What should always be used for intra-oral photos (in addition to mirrors)?

A

retractors

42
Q

True or False: Photoshop Elements 5 is on most Student Lab computers.

A

True

43
Q

What should you bring in order to save adjusted images?

A

memory stick

44
Q

What are the custom aspect ratios for intraoral photographs?

A

3 x 2 (width by height)

45
Q

What are the custom aspect ratios for portrait proportions?

A

2 x 3 (width by height)

46
Q

What are the custom aspect ratios for projector proportions?

A

4 x 3 (width by height)

47
Q

To save them to the memory stick, you should:

  1. Check appropriate boxes to rename files
  2. _______ images (1280 pixels)
  3. _______ proportions
  4. Convert files to ______ but do not preserve ______.
A
  1. Resize
  2. Constrain*
    4.
    do not preserve layers
48
Q

A corrected image should bring out information that is already there but make it easier to visualize. It should not ______.

A

be deceptive (creating features that were never there)

49
Q

In PowerPoint, when enlarging images that were imported. How do you ensure that the image stay proportional?

A

click “format” and then “picture”

50
Q

True or False: Each student is responsible for his or her images.

A

True

51
Q

True or False: the college will provide a number of camera cards for checkout in order to record images.

A

True

52
Q

True or False: the college will provide cameras and computers for image making.

A

True

53
Q

When ready to use images, they must be ______.

A

unidentified

54
Q

True or False: you can unidentify images in PhotoShop or PowerPoint.

A

False, DO NOT use PowerPoint

55
Q

If you loan a card to another to use, the images you took will then be sent where?

A

To whichever patient was chosen in the program during uploading…maybe not your patient’s file. Do it properly. Upload photos then return card for checkout

56
Q

True or False: Emailing photos, even to yourself, is a HIPAA Violation.

A

True

57
Q

True or False: Taking the card outside of the building is a HIPAA Violation.

A

True

58
Q

True or False: Images must be de-identified before moving them to a USB stick.

A

True

59
Q

True or False: Images can be taken on your own personal camera and then they can leave the building.

A

False

Au 15- Early Clinic (9 decks)

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