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840 terms · page 16 of 35
Golden Spiral
A logarithmic spiral constructed from golden-ratio rectangles, sometimes overlaid on a frame as a compositional guide.
Composition & Visual DesignGolden Triangle
A compositional grid formed by a diagonal across the frame and two perpendicular lines from the remaining corners.
Post-Processing & RetouchingGradient Mask
A mask that fades an adjustment smoothly along a linear direction, digitally imitating a graduated filter.
Optics, Lenses & FiltersGraduated Neutral Density Filter
A filter that is dark at one end and clear at the other, used to hold back a bright sky while leaving the land unaffected.
Exposure & MeteringGrey Card
A physical card of known neutral 18 per cent reflectance, held in the subject's light to give both a reliable exposure reading and a white…
Genres, Movements & TheoryGroup f/64
A short-lived association of West Coast American photographers formed in 1932 to advocate sharp, unmanipulated photography.
Lighting & FlashGuide Number
A measure of a flash's power, equal to the product of the correct aperture and the subject distance at a stated ISO.
Cameras, Formats & SystemsHalf-frame Format
A 35 mm format using an 18 by 24 millimetre vertical frame, doubling the number of exposures on a roll.
Printing, Display & OutputHalftone
The reproduction of continuous tone by a grid of dots that vary in size, creating the impression of shades from a single ink.
Exposure & MeteringHandheld Light Meter
A separate instrument for measuring incident, reflected or flash light independently of the camera.
Lighting & FlashHard Light
Light from a source that is small relative to the subject, producing sharply defined shadows with abrupt edges.
Printing, Display & OutputHard Proof
A physical test print made to verify colour and tone before committing to a final print run.
Printing, Display & OutputHDR Display
A screen capable of much higher peak brightness and contrast than conventional displays, showing a wider range of tones.
Post-Processing & RetouchingHDR Merge
Combining bracketed exposures into one file holding a greater dynamic range than any single frame could.
Composition & Visual DesignHeadroom
The space between the top of a subject's head and the upper edge of the frame.
Genres, Movements & TheoryHeadshot
A tightly framed portrait of the head and shoulders, made for professional identification and representation.
Post-Processing & RetouchingHealing Brush
A retouching tool that copies texture from a source area while blending its tone and colour into the destination.
Files, Metadata & WorkflowHEIF
A modern container format using video-derived compression to store images at roughly half the size of JPEG for equivalent quality.
Composition & Visual DesignHigh Angle
A viewpoint above the subject, looking downward.
Sensors & Digital CaptureHigh ISO Noise Reduction
In-camera processing that smooths noise in high-sensitivity images before writing the JPEG.
Lighting & FlashHigh-key Lighting
A lighting approach in which most tones sit in the upper half of the range, with few dark shadows and a bright background.
Motion, Video & Creative TechniquesHigh-speed Photography
Capturing events too fast for the eye, using very brief flash durations or specialised high-frame-rate cameras.
Lighting & FlashHigh-speed Sync
A flash mode that fires a rapid train of pulses during the whole travel of the shutter slit, allowing flash above the normal sync speed.
Exposure & MeteringHighlight Alert
A playback warning, often called blinkies, that flashes any area of the image where the brightest tones have clipped.