Camera basics

Camera Basics
Using a Camera
1

Types of Cameras
 Still Cameras
 Fixed Lens Cameras
 Lens is not interchangeable (removable)
 Variable zoom, controlled by servo
controller
 User friendly, less manual
features
 Less expensive (<$500)
2

Types of Cameras
 Still Cameras
 Single Lens Reflex (SLR)/Digital SLR
 Lens is interchangeable (removable)
 Professional quality, more manual features
 More expensive ($500+)
 Lenses often sold separately
3

Types of Cameras
 Video Cameras
 Studio Camera
 Designed for studio use only
 Very expensive ($50,000+)
 Very high quality
 Not used to record audio
 No built-in recorder
 Camera Control Unit separate
 Color balance, iris and other controls not adjusted on camera
 Heavy and difficult to transport
 Requires a pedestal mount

Types of Cameras
 Video Cameras
 Camcorder
 Used for field production (outside studio)
 Portable and durable
 Records to tape, card, or built-in hard drive
 Records audio
 Built-in microphone
 High quality audio inputs
 Various types of camcorders
 Professional (ENG) – ($10,000+)
 Consumer – ($300+)
 Prosumer – ($3000-10,000)
5

Types of Cameras
 HDSLR Cameras
 Growing popularity of using DSLR cameras for
shooting HD video
 Lens is interchangeable (removable)
 Lenses give more cinematic look
 Cameras often shoot multiple frame rates
 Requires more accessories
for quality video capture
 Audio capture (microphone)
 Mounting device (video rig)
 Follow focus
 External video screen
6

Resolution
 Digital images are made up of pixels
 The more pixels, the higher quality the image
 Higher resolution images take up more digital space on the
storage device (memory card, videotape, hard drive, etc.)
 Measured in pixel columns by pixel rows
 640x480 – analog standard definition video
 1920x1080 – high definition (HD) video
 2048x1536 – 3,145,728 pixels (3.1 megapixels)
 DPI – dots per inch
 Measures the density of dots per inch in a digital print
 The higher the dpi, the better quality the print
 Examples: 72, 96, 150, 300 dpi
 Images for print should be created at 300 dpi, text at 400 dpi
7

Camera Controls
 Cameras have a number of different functions.
 Some settings are found only on still cameras,
some on video cameras or some on both
 The following controls may be automatically or
manually adjusted
 Manual means the operator adjusts the camera
 Automatic means the camera selects the best setting
for the given conditions.

Camera Controls
 White balance (still and video cameras)
 Gives the camera a “true white”, adjusting
all other colors accordingly.
 As lighting changes from one location to
another, WB should be adjusted
 May have multiple modes for white
balance
 Auto WB
 Indoor WB
 Outdoor WB
 Manual (custom) WB
 When in manual mode the symbol often blinks
when it needs setting and is solid when WB is
set
 Manually set WB by zooming in or focusing on
a white surface
“white balance” icons on
many still cameras

White Balance
The picture (right) shows an
outdoor scene with indoor
white balance settings.
(Note the blue tint)
The picture (left) shows an
outdoor scene with
proper outdoor white
balance settings.

Camera Controls
 ISO aka “Film Speed” (still cameras)
 Determines how sensitive the camera’s image
sensor is to light
 The lower the ISO, the slower the speed
 Lower ISO when possible
 High ISO results in more grainy photos
 Common ISOs are 100, 200, 400 and 800
 ISO setting recommendations
 100-200: outdoors, sunny conditions
 400-800: outdoors, cloudy conditions
 1600: night time, low light
12

Camera Controls
 Iris (still and video cameras)
 The iris controls the amount of light entering
into the lens
 The lower the light conditions, the wider the
aperture (opening) should be
 Iris is measured in f-stops
 f/1.4, f/2, f/2.8
 As f-stop numbers get larger, the aperture gets
smaller (and vice-versa)

Iris
14
The picture (right) shows
an outdoor scene with
an improper iris setting.
The picture (left) shows
an outdoor scene with
a proper iris setting.

Camera Controls
 Shutter speed (still and video cameras)
 Allows for shooting of fast moving objects without
blurring
 The faster the subject, the faster the speed
 Measured in fractions of a second
 1/60 (of a second) – slow shutter
 1/2,000 - fast shutter
 The faster the shutter speed, the less light the
camera lens allows in

Shutter Speed
The difference between
these two photographs
is shutter speed. The
bottom photo shows a
faster shutter speed
than the top. The
pinwheel (which is
moving) is clear and
seems to be frozen in
mid-air.

Camera Controls
 Gain (video cameras)
 Boosts the video signal in low light conditions.
 Gain affects resolution.
 Gain creates “video noise”
 The higher the gain, the lower the resolution.
 Gain is measured in decibels
 +6 dB, +9 dB, +12 dB

Gain
The picture below shows how boosting the gain gives
the appearance of more light, but adds video noise,
making it look “grainy”.

Camera Controls
 ND Filter (Neutral Density Filter)
 Filters out bright sunlight to avoid overexposure
 May be a camera setting (video)
 May be an actual filter placed on the front of the
lens (photo)
19

Camera Controls
 Focal Length
 Distance from lens to imaging sensor
 Determines the picture’s angle of view (magnification)
 As focal length increases
 Angle of view becomes more narrow
 Less elements are visible
 Zoom (increase in focal length)
 May be controlled with the servo zoom control on the
camera or by manipulating the lens (DSLR)
 Zoom may be measured in millimeters (photography)
or “power” (video)
20

Camera Controls
 Optical zoom – focal length changes
 No quality loss when going wide to narrow
 Digital zoom – focal length doesn’t change, the
camera enlarges the image
 Pixels are enlarged
 Loss of quality
 To determine optical zoom power, divide the zoom
setting by the widest setting, ie 500mm/50mm = 10x
 If a lens has a zoom range of 18mm – 270mm…
 18-35mm (1-2x ) = wide angle
 36-70mm ( 3-4x) = normal angle
 135-270mm (7-15x) = telephoto

Zoom
The photos below show the
difference between optical
zoom (left) and digital zoom
(right). Notice the pixilation
on the digital zoom.
Optical Zoom (approx. 7x) Digital Zoom
Wide Angle (no zoom)

Camera Controls
 Focus (both still and video)
 Sharpness or clarity of an image
 Manually adjusted with the focus ring
located on lens
 Selective focus
 Creates variety, interest and
emphasis in the shot
 Must be zoomed in (the farther, the
more dramatic)
 Must have significant distance
between foreground and
background
 Rack focus
 Focus is shifted while recording
video
In selective focus, we have a foreground
subject in focus (rose) and a subject in the
background (church) out of focus.

Camera Controls
 Focus (cont.)
 MOD – minimum object distance
 This is the point at which a lens is too
close to the subject to focus
 MOD can be decreased (ie from six
inches to three inches) with a macro,
allowing the camera to focus at a closer
distance
 Macro may be a lens attachment or a
setting on the camera
“macro” icon on many
still cameras

Camera Controls
This picture was taken
with macro settings.
Notice the contrast in
focus between the
foreground (close to the
camera) and background.

Basic Camera Care
 Handle the camera with care
 Do not point the lens at the sun, bright lights or bright
reflections for an extended period of time
 Do not clean the camera or the lens with solvents,
liquids, or chemicals
 Use clean, dry cloth for camera; lens cloth for lenses
 Do not touch a camera lens
 Keep covered when not in use
 Do not operate or store equipment in extreme
temperatures or weather
26

Camera basics

More Related Content

What's hot (20)

Similar to Camera basics (20)

Recently uploaded (20)

Camera basics