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49 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are two explanations for how we perceive motion
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persistence of vision, phi phenomenon
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Persistence of visioN/
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the images move too fast for the eye so the black space isnt seen; has been disproved
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Phi phenomenon?
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closes the shutter between frames, black space, that is cancelled by persistence of vision
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What is process during intermittent movement?
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movement of the camera where the film is pulled down so that each frame is projected; the shutter blocks the screen while the pull-down claw pulls the film down; registration pin holds the film in place as it is exposed to the screen
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What does the pull down claw do on the motion pic cam
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pulls the film down frame by frame
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what does the shutter do on the motion pic cam
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it blocks the projection while the film is pulled down by the pdclaw
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What is the role of the registration pin in the motion pic cam
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holds the film in place as the frame is exposed
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what is the exposure time and shutter angle formula?
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Exposure time (shutterspeed) = (1/shutter speed) * (angle of shutter opening / 360)
SO shutterspeed ^ 2 = angle of shutter opening / 360 |
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What is overcranking?
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you shoot at 48 fps so when you play back it is in slow motion
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What is undercranking? how fast is it shot?
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you shoot at 12fps so when you play back it is fast motion
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What are the calculated lengths for 16mm and 35mm?
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16 mm is 36 feet per minute
35 mm is 90 feet per minute |
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What are the layers of black and white film?
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emulsion
base antihalation backing |
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What are the layers of color film?
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blue emulsion
yellow dye green emulsion magenta dye red emulsion cyan dye antihalation backing base |
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how does the human eye color balance?
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the human eye adjusts so that the light source looks white
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What temperture is tungsten film balanced to? daylight?
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3200k
5500k |
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What color is an 80a filter? *H
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blue
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in poisonwood bible, a-d-a (80a) is sad = blue
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What color is an 85 filter?
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amber
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What color filter do you use if you are shooting tungsten balanced outdoors?
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amber (85)
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What color filter do you use if you are shooting daylight balanced film in a tungsten situation?
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blue (80a)
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What are two ways of keeping track of film?
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edge numbers/key numbers
key code |
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What are edge numbers/key numbers?
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they are phtographically imprinted between sproket holes on raw film to keep track of film
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What is key code?
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it is an electronically readable version of edge numbers/key numbers, used to keep track of film; it is like a barcode
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How do you read the edge numbers?
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the first 4 numbers are the date and batch, the rest are sequential numberings
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What is analog vid recording?
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Turning the video wave into an electrical signal
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What is digital vid recording
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Turns the video into 0s and 1s
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is analog or digital vid recording superior? why?
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digital, does not degrade when copied
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How does video recording work? what are the possible differences in video cameras?
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light strikes the ccd (charge coupled device), which is covered with light sensitive pixels that convert the light into a complex electrical signal; 3 chip (rgb) or one chip
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What are the 4 video camera controls? H*
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EECD
exposure (fstops), exposure index (light sensitivity), depth of field, and color balance |
CCD --> EECD
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WHat are the three video standards?
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NTSC, PAL/SECAM, HDTV
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Which video standard is the US interlaced standard?
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NTSC
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Frame rates: how many fps:
NTSC PAL/SECAM HDTV |
NTSC: 29.97 fps
pal/secam: 25 hdtv: many different: 23.98p, 24p, 25p, 30p, 50i, 59.94i, 60i |
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Interlaced lines: how many
ntsc pal/secam hdtv |
ntsc: 525
pal/secam: 625 hdtv: 1080 only (720 or 1080 horizontal lines/vertical )pixels |
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What is progressive (with relation to video standards), which video standard uses it?
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only hdtv, all the slices of the frame are put on sequentially, both 720 and 1080 have this
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Which frames for hdtv can use interlaced?
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only 1080
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What is important about resolutiON?
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the more pixels the better
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How many pixels does ntsc have?
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480
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How many pixels does pal/secam have?
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not mentioned
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How many pixles does hdtv have?
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720 or 1080, 1080 only can be interlaced, both 720 and 1080 can be progressive
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What is a new frame rate that is trying to get into hdtv and ntsc?
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24p
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Are variable frame rate cameras expensive?
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yes sdflkjsdlfjlkjYES
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What is the video equivalent of keynumbers/edge numbers
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timecode
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What is timecode? what are the 2 types?
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how to keep track of frames when videotaping; drop frame timecode and non-drop frame timecode
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What is drop frame? is it in video or film?
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drops an average of 1.8 frame NUMBERS per minute to account for the 29.97ness
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What is non-drop frame timecode
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does not drop the 1.8 frames per minute to account for 29.97ness
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how fast does film run?
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24fps
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How do you transfer film to video? why is this difficult?
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three-two pulldown; becaue film runs at 24 fps and video runs at 30 fps
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What is the 3-2 pulldown?
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every other frame of film you copy to 3 frames of video instead of 2frames, because transfer film->video not the same fps
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What complications does the 3-2 pulldown cause
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trouble with ntsc, you have to slow down the audio because it is not true 30 fps, it is 29.97
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How is keycode transferred to video in the 3-2 pulldown?
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with flex files --> timecode
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