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Digital Photography Glossary

A-E , I-M, O-R, S-Z

Optical Zoom: Optical zoom magnifies the size of an image by adjusting the lens. Unlike digital zoom, optical zoom enlarges the subject without sacrificing resolution.

Point and Shoot: A point and shoot camera offers few or no manual controls and very simple operation. Focus, exposure, and most other adjustments are completely automatic; all the owner needs to do is aim and push the shutter button. Most advanced cameras also have point and shoot modes.

RAW: One of the image formats available on some advanced digital cameras. RAW images are large, usually uncompressed files that, unlike JPEGs, are not processed by the camera and retain all their original data. RAW images are ideal for those who plan on editing their pictures with image-editing software. RAW images may require special software to turn them into a more common format like TIFF or JPEG.

Redeye: Redeye is the term used to describe the red color often visible people's eyes when a picture is taken with a flash. Redeye is caused by the reflection of the flash off the subjects' eyes -- a problem that is compounded when the flash is positioned close to the lens, as it is on many small cameras.

Redeye Reduction: By firing the flash several times just before exposing a photo, cameras with a redeye reduction feature cause a subject's pupils to contract, reducing the reflection that causes redeye.

 

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