Unit 3: Photography Vocab.

Terms in this set (36)

also known as the "field of view", "FOV" and the "angel of the field of view", it is the extent of the view taken in by a lens.

the hole inside the lens that allows light through. Aperture is measured in "f" numbers-a ratio of the diameter of the hole and the focal length of the lens. The size of the hole can be adjusted, a larger hole allows more light in, a smaller hole less.

ability of a lens and camera to focus automatically on an object within its focusing sensors.

the concept of visual equilibrium achieved symmetrically or asymmetrically

a device that is placed inside a machine to supply it with electricity.

a measure of the number of pixels there are on a sensor. The resolution of digital cameras is measured in megapixels.

The part of the camera that holds everything in place.

a picture of a subject that fills the frame, usually with the subject looking particularly close to the camera.

the range of distance within the subject that is acceptably sharp; it varies depending on camera type, aperature and focusing distance, although print size and viewing distance can influence our perception of it.

the locations in a composition which most strongly draw the viewers attention are best described by.

file compression

the process of reducing the size of the image

a transparent piece of tinted glass, plastic or gelatin used to alter the color or character of light or to reduce the amount of light. Filters may be in the shape of discs, squares, or rectangles. Filters are used in photography to change the appearance of a scene by emphasizing, eliminating, or changing color or density, generally so that the scene can be recorded with a more natural look, on a particular film or a digital sensor.

a brief, suddent burst of bright light from a flashbulb or an electronic flash unit.

the distance from the center of a lens or the surface of a mirror to the point at which light passing through the lens or reflected from the mirror is focused.

the ring used to adjust the lens so that the subject appears sharp on the CCD. Most cameras have automatic focus (AF), some have manual override (MF) and some have a fixed focus (F) lens that ensures things from about 1.5 meters to infinity are relatively sharp.

the use of elements within a scene to visually surround the subject and draw attention to it.

digital photography sensitivity is desinated by a single, almost universally-accepted common rating system developed by the International Organization for Standardization which uses the intials "ISO" before the digital camera's sensitivity setting number-e.g. ISO 100

wider than it is high

Liquid Crystal Display-a small flat image-viewing screen in a digital camera.

a single piece of glass having one or more curved surfaces used in changing the convergence of light rays. The light gathering device of a camera, typically a group of compound lens.

means the ability for a camera (or lens) to focus so near to the subject that it is captured life size on the image sensor. Close up photography.

unit of measure equal to one million pixels. The megapixels on an image sensor react to and record light to produce an image.

"digital film", come in different shapes and sizes. CF and SD are the most widely used.

a small dot in a digital photography image. Thousands of pixels make up a digital photograph.

higher than it is wide

an image should be imagined as divided into 9 equal parts by 2 equally spaced horizontal lines and 2 equally spaced vertical lines, and that important compositional elements should be placed along these lines or their intersections.

A popular type of memory card. Popular memory capacities range from 2GB to 32GB. SD Memory cards are also used extensively in mobile phones, although they are in a smaller format. The smallest are SD Micro cards.

an image's degree of clarity in terms of focus and contrast

shutter release

the button on a camera that is pressed to make the shutter open.

with electronic sensors the "shutter" is controlled by the camera's computer. A short shutter speed means the sensor is charged for a fraction of a second. For longer shutter speeds, the sensor is kept charged for longer.

also known as "value"-the degree of lightness or darkness, or color variation from cold tones (blues) to warm tons (reds), in an area of a print, whether a color print or a black-and-white print.

a pole on a base of three legs to which a camera can be attached, providing support that eliminates or reduces camera movement, useful for sharp images when using slow shutter speeds or to show blur from a moving subject.

a viewing device on a camera used by the photographer to see the field of view taken in by the camera's lens and the portion of the view that will be recorded on the image sensor.

a digital camera analyzes a scene using its white balance mode to determine areas that should be recorded as pure white. The camera adjusts the overall scene's color balance so that the areas meant to be reproduced as white in the picutre will be white, thereby also adjusting all the other colors in the scene using the same color shift values, so that all color is accurately represented.

a lens in which focal length is variable. Elements inside a zoom lens shift their positions, enabling the lens to change its focal length-in effect, providing one lens that has many focal lengths.

the ring on the barrel of a zoom lens that the user rotates to change the focal length (zoom in or zoom out)

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