Filter

EN: Filter

Arta

An optical coloured or neutral glass or plastic usually mounted in front of the camera lens. Most remove or reduce particular parts of the light spectrum; others such as neutral density or polarizing filters affect light absorption in other ways.
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Filter

There are two types of filter in photography:(1) A photography filter is a transparent piece of tinted glass, plastic or gelatin, often but not necessarily disc-shaped, used to alter the color or character of light or to reduce the amount of light. Filters may be in the shape of discs, squares or rectangles. Filters are used in photography to change the appearance of a scene by emphasizing, eliminating or changing color or density, generally so that the scene can be recorded with a more natural look, on a particular film or a digital sensor.(2) In image-editing programs such as Adobe Photoshop, the use of a digital filter applies a set of image characteristics to all or part of an image.

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Filter factor

A number that indicates to what extent you must increase exposure when you use a particular filter (by multiplying the unfiltered exposure by the filter factor number). Filters absorb light. The filter factor allows you to compensate for this absorption. The amount of exposure compensation has been predetermined for every filter, and is expressed as a filter factor (sometimes also called an exposure factor, and also referred to as Exposure Magnification or EM values).

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Filter size

is determined by the inner diameter of the front of a lens, more specifically the threads into which a filter is screwed to attach it to the lens. A 62 mm filter screws onto a lens that has threads that have a diameter of 62 mm. Most filters and some lenses are inscribed with their filter size in millimeters.

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Filter

A colored piece of glass or other transparent material used over the lens to emphasize, eliminate, or change the color or density of the entire scene or certain areas within a scene.

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Filter

A colored piece of glass or other transparent material used over the lens to emphasize, eliminate, or change the color or density of the entire scene or certain areas within a scene.

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Filter

A colored piece ofglass or other transparent material used over the lens to emphasize, eliminate, orchange the color or density (ND) of the entire scene or certain areas within a scene.Also see colour temperature , UV . Technically, it explainedas a piece of material which restricts the transmission of radiation. Generally colouredto absorb light of certain colours. Can be used over light sources or over the cameralens. Camera lens filters are usually glass either dyed or sandwiching a piece ofgelatin in a screw-in filter holder.

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Filter

A tinted glass or small tinted plastic sheet placed in front of the lens or behind the lens in a filter holder, used to change the color rendition of the entire shot. Filters are used to convert tungsten balanced film for use in daylight or vice versa. The can also be used for aesthetic reasons, such as a red filter to darken the sky when filming in black and white.

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Filter

Optical component that removes some light, either to lower intensity (neutral filters) or to change the light spectrum (colored filters).

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Filter

Tinted glass, gelatin, or plastic discs that fit onto a camera lens or under the lens of an enlarger to emphasize, eliminate, or change color, contrast, or density.

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Filter

Usually mounted to front of lens, this piece of optical glass or similar material changes color or look of scene being photographed.

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Filter

A plastic or glass lens that fits in front of the camera lens and is used to manipulate or affect the final image.

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Filter (camera)

Any light-transmitting medium that absorbs, reflects, or diffuses light when placed in front of or behind a lens.

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Filter (digital)

Part of a software programme or plug-in for a programme that is used to alter the appearance of a digital image. Countless options are available to distort, blur, sharpen or add artistic effects. .

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Filter (for a light)

Any light-transmitting medium that, when placed in front of the fixture, absorbs, reflects, or diffuses part or all of the beam. Filter may imply glass as opposed to Gel materials. Also see: Dichroic.

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Filter (optical)

Glass or plastic item that goes in front of the camera or enlarger lens to either absorb and remove selected wavelengths of light or add special effects such as soft focus, starbursts or multiple images. There are different ways of attaching filters, for instance screwing a round filter in front of the lens, or sliding a square or rectangular filter in a filter holder which is attached to the lens with an adapter ring. .

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Filter adapter ring

Placed between a filter and the lens when attachment size differs. .

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Filter factor

The Exposure correction needed to compensate for light losses due to a filter. Through-the-Lens Meter-ing automatically compensates for most filters.

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Filter factor

Indicates the amount the unfiltered exposure should be increased when an optical filter is attached. .

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Filter thread

Most SLR cameras, some digital and a few compacts have a threaded ring at the front end of the lens. This is used to attach coloured and special effect filters as well as other accessories to alter the light that reaches the film. The diameter of the lens filter thread is measured in millimetres. Stepping rings can be bought to allow one size filter to fit on a different size thread. It s better to step up (use a filter with a larger thread than the lens) to avoid corners being cut off resulting in dark edges to your pictures. Buying advice: If you re considering buying a camera for use with a particular lens accessory, make sure you can either fit the accessory direct to the camera lens or at least adapt it to fit. .

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