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840 terms · page 15 of 35


A–Z
All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0–9
Motion, Video & Creative Techniques

Frame Rate

The number of individual frames recorded or played back per second.

fps
Composition & Visual Design

Frame Within a Frame

Using an element in the scene — a doorway, arch, window or overhanging branch — to surround and isolate the subject.

Printing, Display & Output

Framing Glass

The transparent glazing that protects a framed print, available in grades differing in reflection and ultraviolet filtering.

% UV blocked
Motion, Video & Creative Techniques

Freelensing

Detaching a lens from the camera and holding it in front of the mount, tilting it to create selective focus and light leaks.

Post-Processing & Retouching

Frequency Separation

A retouching technique that splits an image into a blurred low-frequency layer of tone and colour and a high-frequency layer of texture.

px (radius)
Focus & Depth of Field

Front Focus

A calibration error in which a lens consistently focuses slightly nearer than the intended subject.

mm
Cameras, Formats & Systems

Full Frame

A sensor the same size as a 35 mm film negative, 36 by 24 millimetres, treated as the reference format for focal length and depth of field.

Crop factor = 1.0 mm
Sensors & Digital Capture

Full-well Capacity

The maximum number of electrons a photosite can hold before it saturates and stops responding to further light.

e⁻ (electrons)
Colour & Colour Management

Gamma

The non-linear relationship between stored numerical values and displayed brightness in a colour space or on a device.

Output = Input^γ γ exponent
Colour & Colour Management

Gamut

The complete range of colours a device, medium or colour space can produce or record.

Colour & Colour Management

Gamut Mapping

The process of converting colours from a larger space into a smaller one while preserving as much of the image's appearance as possible.

Printing, Display & Output

Gamut Warning

A soft-proofing overlay that flags pixels whose colours the destination profile cannot reproduce.

Files, Metadata & Workflow

Geotagging

Recording the latitude, longitude and sometimes altitude of an image's capture point in its metadata.

degrees
Composition & Visual Design

Gestalt Principles

A set of observations from perceptual psychology describing how the visual system groups separate elements into wholes.

Optics, Lenses & Filters

Ghosting

Distinct secondary images of a bright light source formed by reflections bouncing between lens element surfaces.

Printing, Display & Output

Giclée

A marketing term for a fine-art inkjet print, generally implying pigment inks on archival paper.

Cameras, Formats & Systems

Gimbal Head

A tripod head that supports a long lens at its centre of gravity, letting it swing weightlessly in two axes.

kg (load rating)
Motion, Video & Creative Techniques

Gimbal Stabiliser

A motorised three-axis mount that holds a camera level and steady while the operator moves.

kg (payload)
Cameras, Formats & Systems

Global Shutter

An electronic shutter that starts and stops the exposure for every photosite at exactly the same instant.

seconds
Printing, Display & Output

Gloss Differential

A visible difference in surface sheen between inked and uninked areas of a glossy print.

Printing, Display & Output

Glossy Paper

Paper with a smooth, highly reflective surface that maximises apparent contrast and colour saturation.

Lighting & Flash

Gobo

An opaque cut-out or template placed in a light's beam to cast a shaped pattern onto a subject or background.

Lighting & Flash

Golden Hour

The period shortly after sunrise and before sunset when the sun is low, and its light is warm, soft and strongly directional.

Sun elevation ≈ 0° to 6° degrees (sun elevation)
Composition & Visual Design

Golden Ratio

The proportion of approximately 1:1.618 that has been used in art and architecture as a compositional division.

φ = (1 + √5) / 2 ≈ 1.618 ratio