citp 3 (photography and video, drug
recognition, physical evidence)
IOD-00712: Identify common elements of a digital camera system. - ANSWERS-"Point and
shoot" cameras - inexpensive, easy to use, most widely available
Digital Single Lens Reflex (DSLR) - more professional, capability to remove and exchange lenses
Choose lens for specific application, manual focus, times exposures, removable media
Law enforcement standard - 6 megapixel (6 millions pixels)
1 megapixel = 1 million pixels
When installing/removing SD card → if camera is on - cause catastrophic failure of SD card and
attract dust
Lens Zoom
Normal focial length = 50mm
Image quality - JPEG Fine
Image size setting - Large
IOD-00713: Explain the factors that affect photographic images. - ANSWERS-LISA affects our
images
Light, ISO, Shutter Spped, Aperture
Light
2 types - natural and artificial
Shutter Speed
Stops subjects motion and movement
, Controlling "motion blur"
Slowest speed for handheld photography = 1/60
Aperture
Primary function - control amount of light entering the lens
Secondary effect - controlling depth of field
Large F-stop number = better depth of field
Ex: F22 = more depth of field than F4
ISO
Sensitivity of the camera's sensor (adjusts sensitivity of light)
Crime scene setting = 100-400 (not surveillance)
IOD-00714: List techniques associated with photographing and videoing a crime scene and/or
physical evidence - ANSWERS-Photo identifier - filed/photographed as first and last photo in file
- Helps identify the file (include photographer's name, location, date/time, type of incident, case
number)
Photo log - reminder of why photograph was taken
Documentation perspectives
- Overall - the physical location of the crime scene
"Big picture"
- Overlapping coverage
- Intermediate/Midrange - where physical evidence is contained within a scene
- Spacial relationships between evidence and evidence
Close up (of evidence)
- 90 degree angle,
recognition, physical evidence)
IOD-00712: Identify common elements of a digital camera system. - ANSWERS-"Point and
shoot" cameras - inexpensive, easy to use, most widely available
Digital Single Lens Reflex (DSLR) - more professional, capability to remove and exchange lenses
Choose lens for specific application, manual focus, times exposures, removable media
Law enforcement standard - 6 megapixel (6 millions pixels)
1 megapixel = 1 million pixels
When installing/removing SD card → if camera is on - cause catastrophic failure of SD card and
attract dust
Lens Zoom
Normal focial length = 50mm
Image quality - JPEG Fine
Image size setting - Large
IOD-00713: Explain the factors that affect photographic images. - ANSWERS-LISA affects our
images
Light, ISO, Shutter Spped, Aperture
Light
2 types - natural and artificial
Shutter Speed
Stops subjects motion and movement
, Controlling "motion blur"
Slowest speed for handheld photography = 1/60
Aperture
Primary function - control amount of light entering the lens
Secondary effect - controlling depth of field
Large F-stop number = better depth of field
Ex: F22 = more depth of field than F4
ISO
Sensitivity of the camera's sensor (adjusts sensitivity of light)
Crime scene setting = 100-400 (not surveillance)
IOD-00714: List techniques associated with photographing and videoing a crime scene and/or
physical evidence - ANSWERS-Photo identifier - filed/photographed as first and last photo in file
- Helps identify the file (include photographer's name, location, date/time, type of incident, case
number)
Photo log - reminder of why photograph was taken
Documentation perspectives
- Overall - the physical location of the crime scene
"Big picture"
- Overlapping coverage
- Intermediate/Midrange - where physical evidence is contained within a scene
- Spacial relationships between evidence and evidence
Close up (of evidence)
- 90 degree angle,
