Diopter

EN: Diopter correction

Fotografie

An adjustment on the viewfinder of a camera, allowing someone to adjust the viewfinder to their vision and removing the need to wear their glasses when looking through it. Diopter adjustments cannot compensate for all vision problems, only near and far sightedness can be compensated
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Diopter

A unit of measure of the refractive power (strength or magnifying power) of a lens. A prescription for eyeglasses is normally written with numbers that represent diopters. Greater vision correction is needed as the diopter measurement increases. In photography, the term is used (1) with close-up lenses to indicate their magnification and focal length, and (2) with corrections to the camera viewfinder s lens when adjusting it to suit the user s eyesight, enabling the photographer to focus an image on the ground glass without wearing his or her eyeglasses. Note that not all camera s viewfinders can be adjusted to compensate for the photographer s eyesight. When they can, the cameras are sometimes said to have a diopter. .

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Diopter

Optical unit of measurement used in eyeglass lens manufacture -- higher the number, greater the correction needed to obtain proper focus.

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Diopter

The degree to which the light ray bundles leaving the viewfinder converge or disperse. The standard diopter of all EOS cameras is set at 1 dpt. This setting is designed to allow the finder image to appear to be seen from a distance of 1m. Thus, if a person (artist) cannot see the viewfinder image clearly, the person should attach to the camera s eyepiece a dioptric adjustment lens having a power which, when added to the viewfinder s standard diopter, makes it possible to easily see an object at one meter. The numerical values printed on EOS dioptric adjustment lenses indicate the total diopter obtained when the dioptric adjustment lens is attached to the camera.

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Diopter

The diopter is part of the viewfinding system of a camera that can be adjusted to compensate for your own particular eyesight, allowing you to see the groundglass clearly.

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Diopter

A measure of lens power equal to the reciprocal of the focal length. Eyeglass prescriptions are generally indicated in diopters. For cameras, the diopter is used as the measure of the dioptric power for the image in the viewfinder.

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