vocab 2

FILE FORMAT- the form in which digital images are stored and recorded, e.g., JPEG, RAW, TIFF, etc.
FILTER- usually a piece of plastic or glass used to control how certain wavelengths of light are recorded. A filter absorbs selected wavelengths, preventing them from reaching the light sensitive medium. Also, software available image-processing computer programs can produce special filter effects
FLARE- unwanted light streaks or rings that appear in the viewfinder, on the recorded image, or both. It's caused by extraneous light entering camera during shooting.
FOCUS- an optimum sharpness or image clarity that occurs when a lens creates a sharp image by converging light rays to specific points at the focal plane.
FRAME- the complete image-exposure area
F/STOP- the size of the aperture or diaphragm opening of a lens, also referred to as f/number or stop
GB- (gigabyte) just over one million bytes
HARD DRIVE- a contained storage unit made up of magnetically sensitive disks
HOT SHOE- an electronically connected flash mount on the camera body. It enables direct connection between the camera and an external flash, and synchronizes the shutter release wit the firing of flash
ICON- a symbol used to represent a file, function, or program
IMAGE EDITING PROGRAM- software that allows for image alteration and enhancement
INFINITY- a term used to denote the theoretically most distant point of focus
ISO- from ISOS (greek for equal) a term for industry standards from the International Organization for Standardization. when an ISO number is applied to film, it indicates the relative light sensitivity of the recording medium. Digital sensors use film ISO equivalents, which are based on enhancing the data stream or boosting the signal
JPEG- Joint Photographic Experts Group. This is a loss compression file format that works with any computer and photo software. JPEG examines an image for redundant info and then removes it. It's a variable compression format because the amount of leftover data depends on the detail in the photo and the amount of  compression. At low compression/high quality, the loss of data has a negligible effect on the photo
KB- (kilobyte) just over one thousand bytes
LCD- Liquid Crystal Display, which is a flat screen with two clear polarizing sheets on either side of a liquid crystal solution. When activated by an electric current, the LCD causes the crystals to either pass through or block light in order to create a colored image display
LED- Light Emitting Diode. It's a signal often employed as an indicator on cameras as well as on other electronic equipment
LENS- a piece of optical glass on the front of a camera that has been precisely calibrated to allow focus
LENS SHADE- a short tube that can be attached to the front of a lens to reduce flare. It keeps undesirable light from reaching the front of the lens and also protects the front of the lens
LIGHT METER- also called an exposure meter, it is a device that measures light levels and calculates the correct aperture and shutter speed