IAI Certification Exam Verified Questions And
Answers With Latest Quiz
1:1 magnification Ratio ANS Item of evidence is life-size on sensor; appropriate for photographing
latent print.
Reciprocity Failure ANS Tendency towards over/under exposing with a long shutter speed in a film,
appears as dark noise.
Distance in "mm", optical center of a Lense and sensor when a camera is focused on infinity. ANS
Focal Length
Diffraction (loss of...) ANS Resolution, edge sharpness and clarity of an image.
Light bends when the edge is struck.
Wide angle lens focal length ANS Shorter than 50mm
35mm= fisheye
Aberrations ANS Image formed by a lens is blurred or distorted generally at the widest aperture.
Focal Length ANS Distance in "nm" optical center of a lens and sensor when camera focused on
infinity.
Telephoto Lens ANS Compresses the distance between the foreground and the background.
What is the "Shutter" ANS Opening/ close to control the amount of light striking the camera lens.
SWGIT ANS Scientific Working Group on Imaging Technology
SWGFAST ANS Scientific Working Group on Friction Ridge Analysis, Study and Technology
,Overcast ( no shadows) Day ANS F/8
ISO 100
1/125 SS
or
F/11
ISO 100
1/60 SS
is better due to DOF
What is "ISO" ANS Sensors relative Sensitivity to light
ISO 100 - Sensitive to light
ISO 3200 - Requires less light.
Larger ISO - grainier and noise
4 Variables that directly affect Exposure ANS Shutter Speed
Apertures
ISO
Ambient Lighting
Rule of Thirds ANS DOF extends 1/3 in front of the point of exact focus and 2/3 behind the point of
exact focus
Luminescence ANS Ability of a molecule to emit light from a cause other than heat. Phosphorescence
and Fluorescence
RUVIS ANS Reflected Ultraviolet Imaging System, uses short wave ultraviolet light to visualize
untreated fingerprints
,Absorbed ultraviolet light ANS Blood will absorb UV light, making it contrast with surfaces similar
in color to blood.
Fluorescent Ultraviolet light ANS helps visualize fibers
Visible light fluorescence ANS Powders, chemicals, non-blood body fluids, fibers and drug residue
Sync Speed ANS Shutter speed at which cameras should be set when an electronic flash is used
Each camera has one particular shutter speed that is designed as its sync speed
Avoid fast shutter speeds, shutter closes when flash is on
Image Stabilization ANS Also known as vibration reduction lens elements or sensors can move
gyroscopically when movement is detected, allows use of shutter speed 2 stops slower than normal
Hyperfocal Focus ANS Infinity is in the background
maximizes DOF
What lens doesn't cause distortion ANS 50 mm Lens
Photographing Fluorescent evidence ANS Proper exposure is frequently -2 ( two stops less)
Photographing Fluorescence in visible light range ANS F/11
ISO 100
aperture priority
Photogrammetry refers to: ANS Photographing an object
measuring the image of the object on the processed photograph
, reducing the measurements to some form such as a topographic map or scale crime scene diagram
Proper Exposure Triangle ANS F/Stop (Apature) ISO
\ flash/ambient light /
\/
Shutter Speed
F/Stop ANS Refers to aperture, represents fraction of focal length of lens over diameter of diaphragm.
*** like gauged wire big number = small and vice versa
Focal Length multiplier ANS Corrects "cropped" field of view in camera where sensor is smaller than
the original film negatives for that size
Sunny Day Rule F/16 ANS Sunny day with hard shadows selects F/16 and shutter speed faster than
your ISO
Beware of Diffraction- light bending when it strikes the edge, issue with small apature
Shutter Priority Exposure ANS Photographer determines shutter speed, camera provides appropriate
aperture.
Focal Length ANS Distance from optical center of lens to camera sensor plan when camera is focused
on infinity
3 problems with camera lenses ANS 1. Aberrations- different colors refract differently
2. Diffraction-bending of lights, loss of resolution
3. Distortion- the photo doesn't look as it seems
Answers With Latest Quiz
1:1 magnification Ratio ANS Item of evidence is life-size on sensor; appropriate for photographing
latent print.
Reciprocity Failure ANS Tendency towards over/under exposing with a long shutter speed in a film,
appears as dark noise.
Distance in "mm", optical center of a Lense and sensor when a camera is focused on infinity. ANS
Focal Length
Diffraction (loss of...) ANS Resolution, edge sharpness and clarity of an image.
Light bends when the edge is struck.
Wide angle lens focal length ANS Shorter than 50mm
35mm= fisheye
Aberrations ANS Image formed by a lens is blurred or distorted generally at the widest aperture.
Focal Length ANS Distance in "nm" optical center of a lens and sensor when camera focused on
infinity.
Telephoto Lens ANS Compresses the distance between the foreground and the background.
What is the "Shutter" ANS Opening/ close to control the amount of light striking the camera lens.
SWGIT ANS Scientific Working Group on Imaging Technology
SWGFAST ANS Scientific Working Group on Friction Ridge Analysis, Study and Technology
,Overcast ( no shadows) Day ANS F/8
ISO 100
1/125 SS
or
F/11
ISO 100
1/60 SS
is better due to DOF
What is "ISO" ANS Sensors relative Sensitivity to light
ISO 100 - Sensitive to light
ISO 3200 - Requires less light.
Larger ISO - grainier and noise
4 Variables that directly affect Exposure ANS Shutter Speed
Apertures
ISO
Ambient Lighting
Rule of Thirds ANS DOF extends 1/3 in front of the point of exact focus and 2/3 behind the point of
exact focus
Luminescence ANS Ability of a molecule to emit light from a cause other than heat. Phosphorescence
and Fluorescence
RUVIS ANS Reflected Ultraviolet Imaging System, uses short wave ultraviolet light to visualize
untreated fingerprints
,Absorbed ultraviolet light ANS Blood will absorb UV light, making it contrast with surfaces similar
in color to blood.
Fluorescent Ultraviolet light ANS helps visualize fibers
Visible light fluorescence ANS Powders, chemicals, non-blood body fluids, fibers and drug residue
Sync Speed ANS Shutter speed at which cameras should be set when an electronic flash is used
Each camera has one particular shutter speed that is designed as its sync speed
Avoid fast shutter speeds, shutter closes when flash is on
Image Stabilization ANS Also known as vibration reduction lens elements or sensors can move
gyroscopically when movement is detected, allows use of shutter speed 2 stops slower than normal
Hyperfocal Focus ANS Infinity is in the background
maximizes DOF
What lens doesn't cause distortion ANS 50 mm Lens
Photographing Fluorescent evidence ANS Proper exposure is frequently -2 ( two stops less)
Photographing Fluorescence in visible light range ANS F/11
ISO 100
aperture priority
Photogrammetry refers to: ANS Photographing an object
measuring the image of the object on the processed photograph
, reducing the measurements to some form such as a topographic map or scale crime scene diagram
Proper Exposure Triangle ANS F/Stop (Apature) ISO
\ flash/ambient light /
\/
Shutter Speed
F/Stop ANS Refers to aperture, represents fraction of focal length of lens over diameter of diaphragm.
*** like gauged wire big number = small and vice versa
Focal Length multiplier ANS Corrects "cropped" field of view in camera where sensor is smaller than
the original film negatives for that size
Sunny Day Rule F/16 ANS Sunny day with hard shadows selects F/16 and shutter speed faster than
your ISO
Beware of Diffraction- light bending when it strikes the edge, issue with small apature
Shutter Priority Exposure ANS Photographer determines shutter speed, camera provides appropriate
aperture.
Focal Length ANS Distance from optical center of lens to camera sensor plan when camera is focused
on infinity
3 problems with camera lenses ANS 1. Aberrations- different colors refract differently
2. Diffraction-bending of lights, loss of resolution
3. Distortion- the photo doesn't look as it seems
