FORENSIC PHOTOGRAPHY QUIZ 4

Adrian Ramirez · 95問 · 2年前

通報

問題一覧

Is a disc of transparent glass generally bounded by two spherical surfaces capable of transforming an image

Lens

The eye of the camera is also the heart of the camera

Lens

Is a piece of transparent material made of glass or plastic with two (2) opposite symmetrical (proportional or well-balanced) surfaces or at least one curved surface

Lens

TYPES OF LENS

1. Simple Lens 2. Compound Lens

they differ in the way they are curved and, therefore, in the manner in which they refract light

Simple Lens

A type of lens with at least one surface curving outward. It is thicker in the middle than at the ends.

Convex Lens or Converging/Positive Lens

It is used in the focusing assembly of the camera

Convex Lens

It gathers light rays and refracts them to meet at a certain point.

Convex Lens

Types of Convex Lens

1. Double Convex Lens or Bi-Convex Lens 2. Plano-Convex Lens 3. Positive Meniscus or Converging Meniscus

lens with both faces bulging outward

Double Convex Lens or Bi-Convex Lens

lens with one flat side and convex side

Plano-Convex Lens

lens where the concave side is less pronounced than the convex side.

Positive Meniscus or Converging Minescus

A type of lens with at least one surface curving inward. It spreads out those light rays that have been refracted through it.

Concave Lens

A lens that is thicker at the edges than at the center

Concave Lens

lens with both sides curving inward

Double Concave or Bi-concave Lens

lens with flat side and one concave side

Plano-Concave Lens

lens where the concave side is pronounced than the convex side.

Negative Meniscus or Diveging Meniscus

TYPE OF CONCAVE LENS

1. Double Concave or bi-concave lens 2. Plano-concave Lens 3. Negative Meniscus or Diverging Meniscus

simple lens generally produces aberrated images. It consists of two or more simple lens fitted together.

Compound Lens

a lens with a maximum aperture of f/2.8 or larger is a ________ because it delivers more light intensity to the focal plane, allowing a faster shutter speed.

Fast Lens

It is the largest opening of the diaphragm that the light can pass through

Lens Speed

It is the light-transmitting power of the lens at its maximum aperture, or f-stop setting

Lens Speed

a lens with a maximum aperture of f/3.5 or smaller is a _________ because it delivers less light intensity and requires a slower shutter speed.

Slow Lens

the size of the image produced by a lens depends upon several factors like camerato-subject distance and focal length.

Image Size

is the closest distance at which the lens can be focused while keeping the object at infinity acceptably sharp, that is, the focus distance with the maximum depth of field

Hyperfocal Distance

It controls (a) magnification (the size of the image formed by the lens) and (b) angle of view (the amount of the scene shown on a given size of film).

focal Length

a lens with a focal length about equal to the diagonal size of the film or sensor format is considered to be a normal lens.

Normal or Standard Lens

the angle of view of the human eye which is _________

45 degrees

It shows the subject in a way that is similar to the image seen by the naked eye

Normal or Standard Lens

The angle of view is 45 degrees to 60 degrees

Normal or Standard Lens

a mechanical assembly of lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed focal length (FFL) lens or prime lens.

Zoom Lens (Parfocal lens)

It allows a quick adjustment to give a wider or narrower field of vision

Zoom Lens

It can make the subject appears closer without changing the camera position

Zoom Lens

This type of lens allows more of the scene to be included in the photograph, which is useful in architectural, interior, and landscape photography where the photographer may not be able to move farther from the scene to photograph it.

Wide-angle Lens

a lens with longer focal lengths that constrict the field of view and decrease the depth of field while greatly magnifying the image

Telephoto Lens

ultra-wide-angle lens that does not produce a rectilinear image is called a ________

Fisheye Lens

Types of Zoom Lens

1. Wide Angle Lens 2. Telephoto Lens

Special Types of Lenses

1. Fisheye Lens 2. Macro Lens

a lens that is capable of producing a reproduction ration of 1:1. It is specifically designed for close-up work, with long barrel for close focusing and optimized for high reproduction ratios, and one of the most common tools of macrophotography.

Macro Lens

is an extreme close-up photography, usually of very small subjects, in which the size of the subject in the photograph is greater than life size.

Macrophotography

The taking of a photograph of an object in a very reduced size or tiny images of large object.

microphotography

Taking of photograph through a microscope

photomicrography

Is the failure of light rays to focus properly after passing through a lens or being reflected from a mirror.

Aberration

it is the focusing at different points of rays passing through different parts of a spherical lens.

Spherical Aberration

it is the failure of different colored light rays to focus after passing through a lens

Chromatic Aberration

it is the inability of the lens to bring horizontal and vertical lines in the subject to the same plane of focus in the image.

Astigmatism

It occurs when light falling obliquely on the lens and passing through different circular zones

Coma

a curved, concave, or saucer-shaped image of an object that has a flat surface.

Curvature of Field

when there is a different magnification for the ray's angle.

Distortion

a lens effect that causes images to be sphered or "inflated

Barrel distortion

a lens effect that causes images to pinched at their center.

Pincussion Distortion

It is the result of double refraction from inner lens surfaces. It exhibits itself as a misty, hazy, or cloudy semi-circular path of life.

Optical Flare

It refers to spots on the film caused by stray light worn on shiny parts of the lens, such as the spots on the shutter, lens mount, or from inside the camera itself.

Mechanical Flare

Are colored disks of glass or gelatin which when placed in front of a camera lens, stop one or another color of light from passing through and striking the film.

Filter

They are used to change the composition of available light before allowing it to strike the film.

Filters

Police Filters For Police Photography

1. Blue Filter 2. Green Filter 3. Yellow Filter 4. Ultraviolet Filter

it is used effectively when photographing blood. When used outdoors, a blue filter will make the sky, or any blue object, appear white in the photograph.

Blue Filter

it is used to photograph white cars; the details of the car will stand out. It also cut through haze to a certain extent and can be used with good results to photograph an accident on a hazy day.

Yellow Filter

a filter which screens out the violet end of the spectrum. It is placed in front of a lens and left there. It will not only improve most of the police photographer’s work, it will also prevent the lens from being scratched

Ultraviolet Filter

These are filters which do not affect the color or tonal quality of the scene except for the sky. They can be used both for color and black-and-white films.

Polarizing and Nuetral Density Filter

These are filters which do not affect the color or tonal quality of the scene except for the sky. They can be used both for color and black-and-white films.

Polarizing and Nuetral Density Filter

is used to cut down light transmission. It does not affect the tonal quality of the scene.

Nuetral Density Filters

does not affect the transmitted colors in a way that will change its color temperature.

Polarizing Filter

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