Definitions

Pixels- The smallest element of an image, can be individually processed in a video display system

 Image resolution- The detail an image holds, the higher resolution means more image detail

Megabyte- 1,000,000 bytes, and a byte a is a unit of measurement used to measure data

Megapixel- One Million Pixels

 Gigabyte- 1,000,000,000

 Jpeg- Stands for “Joint Photographic Experts Group,” only because it is the name of the committee that developed it. A JPEG is a compressed image file format

 Raw- A raw file is a collection of unprocessed data

 Tiff- “Tagged Image File Format,” a graphics file format created in the 1980s

 PNG- A compressed raster graphic format

 White balance- A feature most digital and video cameras use to balance color

 Histogram- A graphical representation of the distribution of numerical data

 Aperture- A device that controls the amount of light admitted through an opening

 Shutter Speed- The length of time when the film of digital sensor inside the camera is exposed to light

 Depth of Field- The distance between the nearest and farthest objects in the photo

 Aperture Priority- The photographer presets the aperture and the camera selects the shutter speed

 Shutter Priority- The camera lets the user choose the shutter speed and the camera adjusts the aperture

 Bitmap- A digital image composed of matrix dots

 Exposure- The amount of light per unit area

Watermarking- A translucent design impressed onto a paper, that can be seen when the paper is held into the light

Optical Zoom- Refers to a lens that can change its focal length

Digital zoom- A function of a digital camera that is used to make the image seem closer

 Bracketing- The technique of taking several shots of the same subject using different camera settings

Light Meter- Allows the photographer to determine which shutter speed and f-number should be used for optimum exposure

Image Stabilization- A mechanism used in a still camera or video camera that stabilizes the recorded image by varying the optical path to the sensor

Noise- Is random (not present in the object imaged) variation of brightness or color information in images

Lag Time- Shutter lag is the delay between triggering the shutter and when the photograph is actually taken

Hot Shoe- A bracket on a camera body that provides support and electrical contact for an electrical falsh attachment

Fisheye- A fisheye lens is an ultra-wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image

Macro- Is about photographing objects that are very close to the lens, the film or the sensor

Telephoto- A telephoto lens is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length

Wide angle- A wide-angle lens refers to a lens whose focal length is substantially smaller than the focal length of a normal lens for a given film plane

DSLR- A digital single-lens reflex camera is a digital camera combining the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film

Dynamic Range- It's because the difference between the brightest and darkest areas, or 'dynamic range', is so great that you can't find a single exposure that can capture them both

Digital Negative- (DNG) is an open lossless raw image format written by Adobe used for digital photography

Exposure Compensation- a technique for adjusting the exposure indicated by a photographic exposure meter