004 basic camera info
Transcript of 004 basic camera info
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basic camera
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light tight box
shutteraperture
lens
recording media
basic camera
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basic camera
YAHWEH
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light tight box
eye lids (shutter)
pupil (aperture)
lens
retina(recording media)
basic camera
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basic camera
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Basic Camera Controls:Exposure Modes:
AUTOmatic
Program
Shutter-priority Tv
Aperture-priority Av
Manual Exposure
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Basic Camera Controls:Exposure Modes:
AUTOmatic the camera sets all controls for you. Very limited overrides.
Automatically sets: ISO Apterure & Shutter Speed
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Basic Camera Controls:Exposure Modes:
Program the camera sets the aperture and shutter speed based on a program built into the camera by the manufacturer.
You can override many of the settings and change your exposure.
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Basic Camera Controls:Exposure Modes:
Shutter-priority Tv You set the Shutter Speed
and the camera will automatically
set the correct aperture.
Useful when the motion of a
subject is important. i.e sports
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Basic Camera Controls:Exposure Modes:
Aperture-priority Av You set the aperture and the
camera selects the correct shutter
speed automatically.
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Basic Camera Controls:Exposure Modes:
Manual Exposure
You set both the aperture and
the shutter speed for the exposure.
Useful in extreme lighting
conditions and when you want to
control it all.
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Basic Camera Controls:
There are two basic controls to making a correct exposure:
Aperture&
Shutter Speed
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Apertures:
The aperture controls the amount of
light stiking the sensor & helps to
control the depth of �eld.
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Apertures:- sometimes called an iris diaphragm
- functions much like the pupil in the eye, expanding and contracting depending on the amount of light required.
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Apertures:- the aperture’s expansion is called opening up
- its contraction is called stopping down
- the aperture numbers are called f / stops
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f/1.4 f/2 f/2.8 f/4 f/5.6 f/11f/8
Apertures:
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f/1.4 f/2 f/2.8 f/4 f/5.6 f/11f/8
Apertures:
f / stops are fractions
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f/1.4 f/2 f/2.8 f/4 f/5.6 f/11f/8
Apertures:
the lower the number, the larger the opening
the higher the number, the smaller the opening
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f/1.4 f/2 f/2.8 f/4 f/5.6 f/11f/8
As you open up the aperture...you double the amount of light.
As you stop down the aperture...you half the amount of light
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f/1.4 f/2 f/2.8 f/4 f/5.6 f/11f/8
The aperture controls the amount of light stiking the sensor
& helps to control the depth of �eld.
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300mm f/2.8
What Di�erence Does Aperture Size Make?
Front Lens Element Size Comparison
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300mm f/2.8 300mm f/5.6
What Di�erence Does Aperture Size Make?
Front Lens Element Size Comparison
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$3,500 $300
300mm f/2.8 300mm f/5.6
What Di�erence Does Aperture Size Make?
Front Lens Element Size Comparison
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$3,500 $300
300mm f/2.8 300mm f/5.6
What Di�erence Does Aperture Size Make?
Front Lens Element Size Comparison
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Depth of Field
the distance from foreground to background that is in acceptable focus.
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Depth of Field
the distance from foreground to background that is in acceptable focus.
Three Factors: aperture focal length of the lens focus distance
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Depth of Field
The smaller the aperture...
the more depth of �eld.
The larger the aperture...
the less depth of �eld.
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Shutter Speed:
The shutter controls the quantity
light stiking the sensor (how long
the light is allowed to come in) and it
controls motion.
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Shutter Speed:
Camera shutter speeds are typically:
B 1 2 4 8 15 30 60 125 250 500 1000
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Shutter Speed:
Camera shutter speeds are typically:
B 1 2 4 8 15 30 60 125 250 500 1000
The 1 on the shutter speed scale refers to 1 second of exposure time.
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Shutter Speed:
Camera shutter speeds are typically:
B 1 2 4 8 15 30 60 125 250 500 1000
The other numbers refer to fractions of one second.
We typically refer to 1/2, 1/4th, 1/8th as fractions; the
remaining numbers, 1/30 and higher, are referred to as
whole numbers.
f/8 @ 1/2 second or f/8 @ 250 (the fraction is understood)
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Shutter Speed:
Camera shutter speeds are typically:
B 1 2 4 8 15 30 60 125 250 500 1000
B represents bulb. Which refers to the shutter being
held open as long as the bulb is squeezed or the cable
release is depressed.
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Shutter Speed:
B 1 2 4 8 15 30 60 125 250 500 1000
Fast shutter speeds can freeze motion.
A very slow shutter speed will record even a slow
moving object with some blur.
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Shutter Speed:
B 1 2 4 8 15 30 60 125 250 500 1000
Shutter speeds are also in 1-stop increments and
relate in the same way the aperture stops do.
Each speed = one stop Each stop = one half or double the amount of like
striking the sensor.
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