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Introduction to Digital Cameras

resolution —refers to the amount of fine detail in a photograph. Higher resolution (e.g. 1600x1200pixels) results in sharper details, but requires more memory (useful for printed images). Lower resolution (640x480) results in fuzzier details, but is very suitable for Web pages or on-screen projects, such as slide shows. optical viewfinder —typical viewfinder of traditional cameras; uses combination of lenses to show image. digital viewfinder —uses LCD screen to project image seen through front lens of camera. optical zoom —brings images into closer view by moving lenses closer together; results in no loss of detail. digital zoom —brings images into closer view by enlarging pixels on LCD screen; results in some loss of detail. aperture —size of the lens opening; lower numbers (f1.8, f2) are larger and allow more light into the camera (resulting in images with less depth of focus); higher numbers (f14) allow less light (images have greater depth of focus)