Photography Flashcards
What factors work together to create exposure?
aperture
shutter speed
ISO (how sensitive to light)
Lighting
Image sharpness is dependent on the _____ of field, critical _______, and quality/maintenance of the ______.
depth
focusing
lens
Does a small or large aperture provide better image sharpness?
small
f/22 for intraoral images
What is the “F stop?”
a ratio between aperture diameter and lens focal length (a quantitative measure of lens speed)
“Depth of Field” is equivalent to the “Zone of _____ _____”
acceptable sharpness
True or False: A large aperture provides a more highly focused image.
False
Which has a larger aperture: f22 or f18?
f18 (small f stop = large opening)
Which has a smaller aperture: f4 or f1.6?
f4 (large f stop = small opening)
A smaller aperture provides less ________ away from the focal plane.
divergence
Less divergence from the focal plane provides a ________ depth of field.
greater
Which is better for intraoral images: f/5.6 or f/22?
f/22
True or False: Mirrors make the subject equidistant to the focal plane and make the aperture size less critical.
True (flattens image so that it is in better focus)
_______ depends on megapixels of the camera and on the lens focal length.
Magnification
True or False: Megapixels are not important because images can be cropped and zoomed.
False
True or False: If a photo is too dark or too light, it can be adjusted without losing detail.
True
Focal length is measured in _______.
millimeters
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).
perspective
What focal length do we use in clinic to minimize distortion?
one-to-one (1:1)
The wide angle lens is ______mm; whereas, the ________ lens is 500mm.
28
telephoto
Which is taken from farther away: wide angle or telephoto?
telephoto (duh…telescope)
True or False: the head position can mask the real jaw position.
True
Illumination is important for what three variables?
- color temperature
- shadows/highlights
- modeling effect
What kind of flash do we use in the clinics?
“Ring Flash”
What kind of flash do we NOT want to use in clinics?
“Point Flash”
True or False: Overexposure is better than Underexposure.
False…underexposure is better because you can brighten it later
True or False: It is better to Under-magnify than Over-Magnify.
True
What is the priority?
sharpness (maximum depth of field through minimum aperture)
The camera mode should be set to _____.
Av
What does “Av” control?
the camera’s aperture
The button at the top of the camera is called the ______ ______.
shutter release
The rolling wheel below the shutter release is known as the _____ wheel.
control.
The limit/full switch should be set to ________ to allow focusing in the mouth.
full
The AF/M switch works with the camera to allow ______ or _______.
manual
autofocus
The AF/M switch should be set to ____ for intraoral shots.
M
The flash has a switch that indicates “Off/On/SE,” what does SE stand for?
energy save mode
Sharpness and _____ are the two most important factors in quality of dental images because they cannot be adjusted later in photoshop.
moisture control
What are the three photographic planes?
frontal
occlusal
sagittal/para-sagittal
How many photos are in the basic series?
7
What are the five intra-photos in the basic series?
Lateral View: #1. Right Buccal and #2. Left Buccal
#3. Frontal View
Occlusal View: #4. Maxillary and #5. Mandibular
What are the other two photos?
Extra-Oral: #6. Frontal Portrait #7. Profile Portrait
What should always be used for intra-oral photos (in addition to mirrors)?
retractors
True or False: Photoshop Elements 5 is on most Student Lab computers.
True
What should you bring in order to save adjusted images?
memory stick
What are the custom aspect ratios for intraoral photographs?
3 x 2 (width by height)
What are the custom aspect ratios for portrait proportions?
2 x 3 (width by height)
What are the custom aspect ratios for projector proportions?
4 x 3 (width by height)
To save them to the memory stick, you should:
- Check appropriate boxes to rename files
- _______ images (1280 pixels)
- _______ proportions
- Convert files to ______ but do not preserve ______.
- Resize
- Constrain*
4.
do not preserve layers
A corrected image should bring out information that is already there but make it easier to visualize. It should not ______.
be deceptive (creating features that were never there)
In PowerPoint, when enlarging images that were imported. How do you ensure that the image stay proportional?
click “format” and then “picture”
True or False: Each student is responsible for his or her images.
True
True or False: the college will provide a number of camera cards for checkout in order to record images.
True
True or False: the college will provide cameras and computers for image making.
True
When ready to use images, they must be ______.
unidentified
True or False: you can unidentify images in PhotoShop or PowerPoint.
False, DO NOT use PowerPoint
If you loan a card to another to use, the images you took will then be sent where?
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
True or False: Emailing photos, even to yourself, is a HIPAA Violation.
True
True or False: Taking the card outside of the building is a HIPAA Violation.
True
True or False: Images must be de-identified before moving them to a USB stick.
True
True or False: Images can be taken on your own personal camera and then they can leave the building.
False
