90 Questions
What does the term 'photography' literally mean?
Drawing with light
What is the purpose of using color correction filters in photography?
To adjust color temperature of light source to match the film being used
What type of film is used to visualize patterns and phenomena not detectable with the naked eye?
Infrared sensitive film
Which type of illumination is characterized by use with black & white film and emphasizing/de-emphasizing certain colored portions of a multi-colored subject?
Artificial illumination
What is the color temperature of electronic flash in photography?
~6000K
What is the purpose of using filters in photography?
To bleach out or enhance contrast for a colored object
What does 'photograph' literally mean?
Light drawing
What type of film is designed for use with specific color temperature sources like daylight and electronic flash?
Color films
What is the purpose of using unidirectional lighting in photography?
Use with black & white film
What is the ideal source used to develop the concept of color temperature?
Black body radiator
What does the color temperature of an incandescent continuous source represent?
The temperature to which a theoretical blackbody must be heated to emit the same distribution of wavelengths
What do lenses use to alter color temperature of a light source?
Color correction filters
What is lens speed expressed as?
$f$-number
What are fast films based on in photographic film types?
$ISO$ or $ASA$ number
In digital photography, what are images captured electronically using?
$CCD$ or $CMOS$ sensors
What is digital resolution in photography approaching that of?
High-resolution film
What does ISO measure in digital photography?
Sensitivity of the image sensor
What is white balance in digital photography analogous to for film?
Color temperature choices
What are modern cameras equipped with for fine-tuning and capturing capabilities?
Lens and digital resolution capabilities
What do photographic film types depend on for fast and slow films?
Illumination source and film speed
What is the primary control of image density in photography?
Aperture setting (f/#)
In photography, what does a 'stop' refer to?
Incremental parameters for aperture size, shutter speed, and ISO (film speed)
What is the purpose of an 18% gray card in exposure determination?
To provide an accurate assessment of the illumination available for image capture
What does reciprocity failure refer to in photography?
Failure of the film to respond to equivalent exposure settings at extremes of exposure
Which camera setting is desirable when there is rapid movement between the camera and subject?
$f/2.8$ @ $1/1000$
What is the purpose of using an incident light meter in photography?
To measure level/intensity of light falling on the subject
What is a neutral card used for in photography?
To provide an accurate assessment of available illumination for image capture
What is bracketing with (+) and (-) exposures used for in photography?
To obtain equivalent exposures by simultaneously increasing the aperture one stop while decreasing the shutter speed one stop and vice versa.
What type of lenses are better for achieving a better depth of field in photography?
Wide angle lenses with small aperture openings.
What does ISO 125 $f/8$ @ $1/250$ represent in photography?
A specific combination of aperture, shutter speed, and ISO setting.
What is better achieved with small aperture openings in photography?
Improved clarity and sharpness in photographs.
What does a range of acceptable focus closer to and further away from the camera refer to in photography?
Depth of field
What is the purpose of color correction filters in photography?
To adjust the color temperature of the light source to match the film being used
What does the term 'photography' literally mean?
Drawing with light
What type of film is designed for use with specific color temperature sources like daylight and electronic flash?
Daylight film
What is the analytical value of using photography in forensic science?
Visualizing patterns and phenomena not detectable with the naked eye
What is the purpose of using unidirectional lighting in photography?
Use with black & white film and emphasizing/de-emphasizing certain colored portions of a multi-colored subject
What is the measure of the light gathering power of a lens in photography?
Lens speed, expressed as the f-number
What is the digital analog to color temperature choices for film in photography?
White balance
What are photographic film types based on?
The illumination source and film speed
What is used to alter color temperature of a light source in photography?
Color correction filters
What is slowly approaching that of high-resolution film in digital photography?
Digital resolution
What is a measure of the sensitivity of the image sensor in digital photography?
ISO
What are modern cameras equipped with for fine-tuning and capturing capabilities?
Conveniences for fine-tuning, and lens and digital resolution capabilities
What type of lenses use color correction filters to alter color temperature of a light source?
All types of lenses
What does digital resolution in photography refer to?
The sharpness and clarity of an image captured digitally
What does lens speed, expressed as the f-number, measure in photography?
Light gathering power of a lens
In digital photography, what are images captured electronically using?
CCD or CMOS sensors
What is used to develop the concept of color temperature in relation to incandescent sources?
Black body radiator
What is reciprocity failure in photography?
Failure of the film to respond to equivalent exposure settings at extremes of exposure.
What is the purpose of an 18% gray card in exposure determination?
To provide an accurate assessment of the illumination available for image capture.
What does a 'stop' refer to in photography?
Incremental parameters for aperture size, shutter speed, and ISO (film speed).
What is bracketing with (+) and (-) exposures used for in photography?
To obtain different exposures by adjusting aperture or shutter speed in half stop increments.
What is primary control of image density provided by in photography?
Exposure settings on the camera: the f/# and the shutter speed.
What does ISO measure in digital photography?
The film speed or sensitivity to light.
What does a leaf shutter refer to in photography?
A type of shutter located within the lens.
What does a focal plane shutter refer to in photography?
A type of shutter located in front of the film plane, most commonly used.
What do equivalent exposures refer to in photography?
Obtaining the same exposure by simultaneously increasing aperture while decreasing shutter speed, or vice versa.
Photography is not used in forensic science for visual documentation method
False
Photographic films are not sensitive to visible light
False
Color correction filters are not used to adjust color temperature of light source in photography
False
Color temperature is not important in photography
False
Filters are not used to alter color temperature of a light source in photography
False
Daylight film is designed for use with color temperature of 3200K
False
Infrared sensitive film is not used to visualize patterns and phenomena not detectable with the naked eye
False
Photography has no analytical value in visualizing patterns and phenomena not detectable with the naked eye
False
Shutters provide automatic control of exposure times; mechanically or electronically timed.
True
The primary control of image density in photography is provided by the ISO setting and the aperture setting.
False
In photography, a 'stop' refers to incremental parameters for aperture size, shutter speed, and ISO (film speed).
True
Equivalent exposures can be obtained by simultaneously increasing the aperture one stop while decreasing the shutter speed one stop.
True
The f/2.8 aperture setting corresponds to a larger opening compared to the f/4 aperture setting.
True
The depth of field is better achieved with wide angle lenses or small aperture openings.
True
Incident light meters measure the level/intensity of light falling on the subject in photography.
True
Reciprocity failure refers to the failure of the film to respond to equivalent exposure settings at extremes of exposure.
True
Bracketing with (+) and (-) exposures is used to obtain different exposure variations in photography.
True
The reflectance of an 18% gray card is the same for all wavelengths, making it a neutral card in exposure determination.
True
The ideal source for developing the concept of color temperature is an incandescent continuous source.
False
Modern cameras are equipped with unidirectional lighting for fine-tuning and capturing capabilities.
False
Color temperature is measured in Kelvin and relates temperature to the distribution of wavelengths given off by an incandescent source.
True
Real sources can never approach the behavior of a black body radiator and are referred to as grey bodies.
False
Lenses alter the distance between the lens and the film for focusing, with different types of lenses available for specific purposes.
True
Lens speed, expressed as the f-number, is a measure of the light gathering power of a lens, with better quality lenses having fixed apertures.
False
Fast films have higher ISO or ASA numbers, while slow films have lower ISO or ASA numbers.
False
In digital photography, images are captured electronically using CCD or CMOS sensors.
True
Digital resolution in photography is already approaching that of high-resolution film, with ISO being a measure of the sensitivity of the image sensor.
False
White balance in digital photography is not the digital analog to color temperature choices for film.
False
Modern cameras have conveniences for fine-tuning, with lens and digital resolution capabilities being the most important parameters.
True
The camera is a light-tight enclosure with a lens and a light-sensitive detector mounted in proper position.
True
Photographic film types are not based on the illumination source and film speed.
False
The color temperature of an incandescent continuous source is not the temperature to which the theoretical blackbody must be heated to emit the same distribution of wavelengths.
False
Study Notes
Photography and Color Temperature
- Color temperature relates temperature (K) to the distribution of wavelengths given off by an incandescent source.
- The ideal source is a perfect absorber and emitter of radiation, referred to as a black body radiator, used to develop the concept of color temperature.
- Real sources can approach the behavior of a black body radiator and are referred to as grey bodies.
- The color temperature of an incandescent continuous source is the temperature to which the theoretical blackbody must be heated to emit the same distribution of wavelengths.
- Lenses use color correction filters to alter color temperature of a light source by preferential absorption of wavelengths from one end of the spectrum.
- Lenses alter the distance between the lens and the film for focusing, with different types of lenses available for specific purposes.
- Lens speed, expressed as the f-number, is a measure of the light gathering power of a lens, with better quality lenses having adjustable apertures.
- Photographic film types are based on the illumination source and film speed, with fast films having higher ISO or ASA # and slow films having lower ISO or ASA #.
- In digital photography, instead of film, images are captured electronically using CCD or CMOS sensors.
- Digital resolution in photography is slowly approaching that of high-resolution film, with ISO being a measure of the sensitivity of the image sensor.
- White balance in digital photography is the digital analog to color temperature choices for film.
- The camera is a light-tight enclosure with a lens and a light-sensitive detector mounted in proper position, with modern cameras having conveniences for fine-tuning, and lens and digital resolution capabilities being the most important parameters.
Photography and Color Temperature
- Color temperature relates temperature (K) to the distribution of wavelengths given off by an incandescent source.
- The ideal source is a perfect absorber and emitter of radiation, referred to as a black body radiator, used to develop the concept of color temperature.
- Real sources can approach the behavior of a black body radiator and are referred to as grey bodies.
- The color temperature of an incandescent continuous source is the temperature to which the theoretical blackbody must be heated to emit the same distribution of wavelengths.
- Lenses use color correction filters to alter color temperature of a light source by preferential absorption of wavelengths from one end of the spectrum.
- Lenses alter the distance between the lens and the film for focusing, with different types of lenses available for specific purposes.
- Lens speed, expressed as the f-number, is a measure of the light gathering power of a lens, with better quality lenses having adjustable apertures.
- Photographic film types are based on the illumination source and film speed, with fast films having higher ISO or ASA # and slow films having lower ISO or ASA #.
- In digital photography, instead of film, images are captured electronically using CCD or CMOS sensors.
- Digital resolution in photography is slowly approaching that of high-resolution film, with ISO being a measure of the sensitivity of the image sensor.
- White balance in digital photography is the digital analog to color temperature choices for film.
- The camera is a light-tight enclosure with a lens and a light-sensitive detector mounted in proper position, with modern cameras having conveniences for fine-tuning, and lens and digital resolution capabilities being the most important parameters.
Photography and Color Temperature
- Color temperature relates temperature (K) to the distribution of wavelengths given off by an incandescent source.
- The ideal source is a perfect absorber and emitter of radiation, referred to as a black body radiator, used to develop the concept of color temperature.
- Real sources can approach the behavior of a black body radiator and are referred to as grey bodies.
- The color temperature of an incandescent continuous source is the temperature to which the theoretical blackbody must be heated to emit the same distribution of wavelengths.
- Lenses use color correction filters to alter color temperature of a light source by preferential absorption of wavelengths from one end of the spectrum.
- Lenses alter the distance between the lens and the film for focusing, with different types of lenses available for specific purposes.
- Lens speed, expressed as the f-number, is a measure of the light gathering power of a lens, with better quality lenses having adjustable apertures.
- Photographic film types are based on the illumination source and film speed, with fast films having higher ISO or ASA # and slow films having lower ISO or ASA #.
- In digital photography, instead of film, images are captured electronically using CCD or CMOS sensors.
- Digital resolution in photography is slowly approaching that of high-resolution film, with ISO being a measure of the sensitivity of the image sensor.
- White balance in digital photography is the digital analog to color temperature choices for film.
- The camera is a light-tight enclosure with a lens and a light-sensitive detector mounted in proper position, with modern cameras having conveniences for fine-tuning, and lens and digital resolution capabilities being the most important parameters.
Explore the application of scientific photography in forensic science, covering topics such as color temperature, lenses, photographic film, digital photography, camera design, and function. Understand the purpose and essential role of using photography in crime scene documentation and evidence details.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
