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Glossary of Terms




Glossary of Terms Used

A

Aperture - The opening of the lens where light enters before it reaches the imaging chip, acts like the pupil of an eye which contracts or expands to control the amount of light that passes through. The size of the opening is controlled by the iris which is composed of thin mechanically interlinked blades. more...

B

Bulb - Manual camera setting which allows the shutter to remain open while the shutter button is pressed. more...

C

Composition - refers to the way in which the different elements that composes a photograph are arranged and how they are presented. This includes distribution of space, positioning of the elements, angle, perspective, depth of field, focus point, and other factors that affect the aesthetics and the artistic value of a photograph. more...

D

Diffuser - a transluscent material that is placed in front of a flash unit to scatter the rays of light emitted by the flash so as to soften the edges of the light source, thus producing softer shadows. more...

E

Exposure - refers to the amount of light that enters to the imaging medium when taking a photograph. It is controlled basically by the aperture (lens opening), shutter speed, or the sensor's sensitivity (ISO). more...

F

Focal Length - the distance between the center of the lens to it's focal point (point where all parallel light converges). In a camera lens assembly however the focal length is measured by the overall effect of the lenses in the assembly. This is used as a basis on the magnification properties of a lens. more...

G

Golden Section - also known as "Divine Ratio" or "Golden Ratio" is a mathematical value used by architects and photographers to produce a naturally pleasing structure or composition. The value 1:r based on the formula r = (1+√5)/2 is used in photography based on the observation that the eye is naturally attracted to the area in a photograph that falls within this ratio. more...

H

Hot Shoe - This is a standard mounting for attaching external flash units to the body of the camera. It has electrical contacts that allow the camera to control the Flash unit. Although the mounting bracket may be similar to different brands of cameras and flash units, the electrical contacts vary depending on the manufacturer's specifications. more...

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