40 terms

Production II - Updated

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What is an 85B filter used for? How many stops does it affect?
Converts Daylight (5500K) to Tungsten (3200K) film. / It results in a 2/3 stop loss.
What is an 80A used for? How many stops does it affect?
Converts Tungsten (3200K) to Daylight (5500K) film. / It results in a 2 stop loss.
Name two uses for a polarizing filter.
Cuts Glare and Adds Reflection. Makes it more saturated
(Cuts down two stops)
How many stops are affected or lost going from 50 ASA to 100 ASA?
Gain 1 f-stop
How many stops are affected (gained/lost) going from a 640 ASA to a 250 ASA?
Lose 1 and 1/3 stop.
How many stops are affected (gained/lost) from going from 100 ASA to 500 ASA?
Gain 2 and 1/3
How does a 45 degree shutter angle affect the image? What causes this effect?
Even less motion blur because each frame is getting less of an opportunity to be exposed to light. A Sharper Image
If you were shooting at a 180-degree shutter angle at an f/5.6 and changed the shutter angle to a 45-degree angle, what would be the new f-stop?
f/2.8
List all of the f-stops.
1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22
If you were shooting at the bottom of your lens (open wide) at a 180-degree shutter angle and changed the shutter angle to a 90-degree angle, how many stops of light would you need to add?
1 Stop
What is the total playback time shooting a 10-second action of 24 fps?
10 seconds
If you were shooting a 33 minute film on 16mm format, how many rolls would you need to purchase for a 5 to 1 shooting ratio?
15 rolls
How many feet are on one roll of 16mm film?
400 feet
How many minutes will one roll of 16mm film last you?
11 minutes
What do we call the scenes within scenes that do not require sluglines?
Hidden Scenes
Which fraction is used to divide a script page into equal parts in order to help with scheduling?
1/8's
What is the principle plane of focus?
The absolute point of focus.
What is depth of field?
The area of acceptable focus
What are the four factors that affect the depth of field?
Iris, Focal Length, Focal Distance, Format
Which format has more depth of field?
16mm
Define hyper-focal distance?
The near distance when the lens is set to infinity. Wide, establishing shots or when we can't measure. Use it to maximize your depth of field.
What is focal length?
Size of the lens in millimeters.
What is focal distance?
The distance from the film plane to the subject.
What is the normal lens focal length for 16mm?
25mm
What is the total playback time shooting a 10-second action at 48 fps?
20 seconds
What is the total playback time when shooting a 10-second action at 12 fps?
5 seconds
If you were shooting with an f/5.6 and then put an ND 3 and ND 6 in, what would be your new f-stop?
f/2
What do you shoot at the head of every roll of film and every lighting change?
18% gray card or a Macbeth
Shutter Angles on the Arri 416
45, 90, 135, 144, 150, 172.8, 180
You are currently reading an f/16, but your desired f/stop is an f/2.8. What ND filter(s) would you use in order to achieve the desired f-stop?
ND 1.5
You are shooting at 24fps at an f/4 and you change your frame rate to 48fps. What is your new f-stop?
f/2.8
You are shooting at an f/4 and you change your frame rate to 12fps? What is your new f-stop?
f/5.6
You are shooting at 24fps at an f/2.8 with no filters and you can change your frame rate to 12fps and add an ND 3. What is your new f-stop?
f/2.8
A way to remember the frame rate change:

48fps is subtracted
12fps is added

If 24fps was f/5.6
48fps would be f/4
12fps would be f/8
...
If shooting 10 seconds on 24fps

6fps -> 2.5 seconds
12fps -> 5 seconds
24fps -> 10 seconds
48fps -> 20 seconds
96fps -> 40 seconds
...
How many feet do you waste in a minute in 16mm?
36 feet
F/2

ND3 = 1 stop of light

therefore ND6= 2 stops of light

1+2=3 stops of light

so you need to open up 3 stops of your aperture to compensate If you were shooting with an f/5.6 and then put an ND 3 and ND 6 in, what would be your new f-stop?
If you were shooting with an f/5.6 and then put an ND 3 and ND 6 in, what would be your new f-stop?
180/90 =1 stop then 90/45= another stop... making only 2 stops
If you were shooting at the bottom of your lens (open wide) at a 180-degree shutter angle and changed the shutter angle to a 90-degree angle, how many stops of light would you need to add?
ASA will be given to us as a chart
800 1000 1290
400 500 640
200 250 320
100 125 160
50 64 80
25 32 40
12

When you're going up, you're doubling; when you're going down, you're halfing it
How many stops are affected or lost going from 50 ASA to 100 ASA?
Difference between F-stops and T-stops.
F-stops are general (...1.4 2 2.8...)
T-stops are specific (...1.3 1.5 1.6 1.7...)

T stops are more accurate. F stops are just percents based on the lens while t stops are percents based on how light and reflectance is in the lens. Just more specific
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