Cinematography Flashcards
Focal Length
The distance from the center of the lens to the point where light rays converge to a point of focus.
Focal length of lens affects perspective relations in the image in terms of depth and scale of objects in the image.
Wide Angle / Short Focal Length ( < 35mm)
–Distorts straight lines toward the edge of the image, making them bulge outward –Exaggerates depth
–Movement to or from the camera seems more rapid
–Greater depth of field than longer focal length lenses
Normal / Middle Focal Length ( 35mm < 50mm)
- No noticeable perspective distortion
- Horizontal and vertical lines straight and perpendicular
- Parallel lines recede to a vanishing point
Telephoto / Long Focal Length ( 75mm < 200mm)
- Space of the shot flattened
- Depth reduced and planes pushed together
- Movement to or from the camera seems prolonged
Depth of Field
The range of distances or planes in front of the camera that can be photographed in sharp, clear focus.
Deep Focus
•Use of lenses and lighting that keeps all planes, closest and farthest away, in sharp, clear focus.
Shallow Focus
Focusing on one plane only.
Rack Focus
•: Shifting focus from foreground to background or vice versa-by definition with shallow focus.
Zoom Lens
- Changes focal length and therefore perspectival relations during a single shot.
- Magnifies or de-magnifies objects filmed and includes or excludes surrounding space so simulates camera movement.
The Frame
It’s not a neutral border. It produces a certain vantage point on the action, and gives a particular point of view. The frame actively defines the image for us.
Aspect Ratio
•The ratio of vertical dimension of frame in relation to horizontal dimension.
Different Aspect Ratios
- 1930’s Academy ratio: 1:1.33
- 1950’s Cinemascope: 1:2.35
- New Academy ratio: 1:1.85
- Television 1:1.33
Pan
Horizontal movement of the camera on a fixed vertical access
Tilt
•Vertical movement of the camera on a fixed horizontal axis.
Tracking / Dolly Shot
• Camera moves in any direction along the ground. It can be towards or away from the subject (tracking or dollying in or out) or alongside it as in a lateral tracking shot.