Understanding Camera Mechanics and Film Frame Rates
Unlock all answers in this set
Unlock answersquestion
Frame Rate of Motion Picture Film
answer
24 fps, television~ 30 fps
question
Shutter Angle
answer
180 degrees. Smaller shutter angle = more jumpy
question
Duration of Exposure
answer
1/48 of a second
question
Mechanics of the camera's movement
answer
registration pin hold film in place in front of the aperture, and the pull down claw then pulls down the film to the next frame.
question
Depth of Field
answer
range of acceptable focus. to decrease: move camera closer to the, open the aperture, increase mm
question
Film Base vs. Emulsion
answer
emulsion is the light sensitive part made out of crystals, film base is the plastic part (sticky side)
question
What creates the illusion of a continuous image from a series of images?
answer
Persistence of vision
question
What creates the illusion of motion from a series of still images
answer
displacement
question
What is the difference between an F stop and a T stop and how are they used?
answer
T stop: includes the amount of light loss that the lens cause. F stop: aperture setting for 18% grey to be exposed correctly
question
Exposure Latitude
answer
range of exposure from absolute black to absolute white (amount of stops)
question
Contrast Ration
answer
key side: fill side. 1 stop difference= 2:1 ratio, 2 stop difference= 4:1 ratio
question
What is a films "speed"
answer
ISO, sensitivity to light
question
What makes a light soft? Why?
answer
soften the edges of the shadow. -Can be achieved by having a large source of light and the light being more dispersed. -Bouncing the light works. -Can bring the light closer to the subject so the source is larger in proportion to the subject. -Sun functions as a point source because it is so far away = light being hard.
question
Incident light vs. reflected light
answer
incident light= light on the subject reflected light= light that bounces off of a subject
question
How does a light meter work?
answer
indicated proper exposure in comparison to 18% grey. +/- stops
question
What does the diopter do?
answer
The diopter is the viewfinder, use to it watch the scene when filming. older cameras would see every other filmed frame
question
What is the proper way to set a C-Stand
answer
sandbag on largest leg, knuckles on the right side
question
What is the proper way to store a flag?
answer
store upright to grab handle. If resting on ground, handle on the bottom so they don't scratch the wall or other silks.
question
What is middle gray?
answer
18% grey in zone five. luminosity of gray that will reflect as much light as falls on it and is used to set exposure
question
What is the key light?
answer
light to set the exposure with
question
What is the function of the fill light?
answer
helps lighten shadows, lessen shadow contrast
question
What is Chiaroscuro?
answer
the play of light and shadow
question
How does the focal length of a lens affect the image?
answer
- wide angle (24mm) lens: deeper depth of field, wider depth of field - a long (140mm) lens: narrow field of view, shallower depth of field
question
How does the distance between the subject and the camera affect the image?
answer
closer to the subject= less depth of field
question
W=VA
answer
Watts=Volts X Amps Volts: 120 in the US, paper amps are 100 volts
question
Paper Amps
answer
paper amps are rounded US volts to use as a safety barrier. 8.3 amps/1000w = 10 paper amps
question
Baby
answer
1k, 10 paper amps
question
Junior
answer
2k, 20 paper amps
question
Senior
answer
5k, 50 paper amps
question
Flag
answer
solid, blocks light
question
Net
answer
green: 1/2 stops (cuts light by 1/4) red: 1 full stop (cuts light by 1/2)
question
Silk
answer
diffuses the light. full silk will cut 2 stops
question
Law of inverse square
answer
-intensity = 1/(distance moved)^2
question
How does camera placement affect your perception of speed of movement?
answer
closer to the subject means that they cross the frame faster and appears to move faster
question
How does the position of a light affect the image?
answer
effects shadow, change how we perceive the volume of light if, can flatten an object, can affect the mood, the quality.
question
What is the color temperature of daylight? Of tungsten light?
answer
daylight: 5600k tungsten: 3200k
question
What is tungsten balanced film?
answer
if you go in tungsten balanced light, white would appear white. If used in daylight, the scene would look warm.
question
Hue
answer
color
question
Chroma
answer
saturation
question
Luminance
answer
brightness
question
Cool colors:
answer
blue, cyan, magenta
question
Warm colors
answer
green, red, yellow
question
What does an 85 filter do? How much light is lost when using it?
answer
a correction filter, can correct daylight balanced film under tungsten lights. 2/3 stop lost
question
Primary and Secondary colors
answer
Green, red, blue Cyan, yellow, magenta
question
What is the proper and safe way to set up and power a light on our stage?
answer
100 amps, then lunch box, then plug into light, then turn on
question
What do colored filters do?
answer
blocks certain wavelength of light. wavelength that pass through are the hue of the light.
question
What does the color temperature mean?
answer
different shades when a black object was heated up. red to white hot, measured in k.
question
How does light placement affect the apparent depth of your subject?
answer
you can flatten out and create depth with the use of a front/side light. You can also use a backlight to create separation. Don't light everything evenly or from behind the camera
question
Light refraction
answer
light goes through a medium and bends (through water)
question
Light dispersion
answer
light goes through a prism and splits into different wavelengths
question
What is the circle of confusion?
answer
smallest point a light can focus to. White light is made out of different colors of light and cannot just be one point, so the smaller these points of light are the sharper the image is.
