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840 terms · page 21 of 35
Lossy Compression
Compression that permanently discards image information judged least perceptible, in exchange for much smaller files.
Composition & Visual DesignLow Angle
A viewpoint below the subject, looking upward.
Optics, Lenses & FiltersLow-dispersion Glass
Special optical glass, marketed as ED, UD, LD or SLD, that bends different wavelengths by more nearly equal amounts.
Lighting & FlashLow-key Lighting
A lighting approach in which most tones sit in the lower half of the range, with a small lit area surrounded by darkness.
Focus & Depth of FieldLow-light AF Rating
The dimmest light level at which a camera's autofocus is specified to work, quoted in EV at a stated aperture and ISO.
Printing, Display & OutputLPI
Lines per inch: the frequency of the halftone screen used in commercial printing.
Exposure & MeteringLuminance
The brightness of a surface as seen from a given direction, measured in candela per square metre.
Post-Processing & RetouchingLuminance Noise Reduction
Processing that smooths brightness variation between neighbouring pixels to reduce the appearance of grain.
Post-Processing & RetouchingLuminosity Mask
A mask generated from the image's own brightness values, restricting an adjustment to a specific tonal range.
Printing, Display & OutputLustre Surface
A semi-gloss paper finish with a fine texture, offering much of gloss's density with reduced reflection.
Optics, Lenses & FiltersMacro Lens
A lens corrected for close focusing that reproduces a subject at life size or larger on the sensor.
Genres, Movements & TheoryMacro Photography
Photography at magnifications approaching or exceeding life size, revealing detail invisible to the unaided eye.
Focus & Depth of FieldMagnification Ratio
The ratio between the size of a subject and the size of its image on the sensor.
Genres, Movements & TheoryMagnum Photos
A photographers' cooperative founded in 1947 to let its members retain copyright and control over their own work.
Genres, Movements & TheoryManipulation Standards
The rules defining what processing is permissible in a given field of photography.
Lighting & FlashManual Flash
Setting flash output as a fixed fraction of full power, so every frame receives an identical burst.
Focus & Depth of FieldManual Focus
Focusing by turning the lens ring by hand while judging sharpness visually or by scale.
Exposure & MeteringManual Mode
A mode, marked M, in which the photographer sets aperture and shutter speed directly and the camera only advises.
Printing, Display & OutputMat Board
A card window placed over a print inside a frame, separating it from the glazing and providing visual space.
Printing, Display & OutputMatte Paper
Paper with a non-reflective surface that scatters light diffusely, giving a soft appearance free of glare.
Optics, Lenses & FiltersMechanical Vignetting
Corner darkening or hard cut-off caused by an accessory physically intruding into the lens's field of view.
Cameras, Formats & SystemsMedium Format
Any format larger than 35 mm but smaller than 4×5 inches, covering film frames from 6×4.5 to 6×17 cm and digital sensors around 44×33 mm.
Sensors & Digital CaptureMegapixel
One million pixels, the standard unit for stating a sensor's resolution.
Files, Metadata & WorkflowMetadata
Information stored within or alongside an image file that describes the picture rather than forming part of it.