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840 terms · page 15 of 35
Frame Rate
Motion, Video & Creative Techniques
fps
The number of individual frames recorded or played back per second.
Frame Within a Frame
Composition & Visual Design
Using an element in the scene — a doorway, arch, window or overhanging branch — to surround and isolate the subject.
Framing Glass
Printing, Display & Output
% UV blocked
The transparent glazing that protects a framed print, available in grades differing in reflection and ultraviolet filtering.
Freelensing
Motion, Video & Creative Techniques
Detaching a lens from the camera and holding it in front of the mount, tilting it to create selective focus and light leaks.
Frequency Separation
Post-Processing & Retouching
px (radius)
A retouching technique that splits an image into a blurred low-frequency layer of tone and colour and a high-frequency layer of texture.
Front Focus
Focus & Depth of Field
mm
A calibration error in which a lens consistently focuses slightly nearer than the intended subject.
Full Frame
Cameras, Formats & Systems
mm
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
Full-well Capacity
Sensors & Digital Capture
e⁻ (electrons)
The maximum number of electrons a photosite can hold before it saturates and stops responding to further light.
Gamma
Colour & Colour Management
γ exponent
The non-linear relationship between stored numerical values and displayed brightness in a colour space or on a device.
Output = Input^γ
Gamut
Colour & Colour Management
The complete range of colours a device, medium or colour space can produce or record.
Gamut Mapping
Colour & Colour Management
The process of converting colours from a larger space into a smaller one while preserving as much of the image's appearance as possible.
Gamut Warning
Printing, Display & Output
A soft-proofing overlay that flags pixels whose colours the destination profile cannot reproduce.
Geotagging
Files, Metadata & Workflow
degrees
Recording the latitude, longitude and sometimes altitude of an image's capture point in its metadata.
Gestalt Principles
Composition & Visual Design
A set of observations from perceptual psychology describing how the visual system groups separate elements into wholes.
Ghosting
Optics, Lenses & Filters
Distinct secondary images of a bright light source formed by reflections bouncing between lens element surfaces.
Giclée
Printing, Display & Output
A marketing term for a fine-art inkjet print, generally implying pigment inks on archival paper.
Gimbal Head
Cameras, Formats & Systems
kg (load rating)
A tripod head that supports a long lens at its centre of gravity, letting it swing weightlessly in two axes.
Gimbal Stabiliser
Motion, Video & Creative Techniques
kg (payload)
A motorised three-axis mount that holds a camera level and steady while the operator moves.
Global Shutter
Cameras, Formats & Systems
seconds
An electronic shutter that starts and stops the exposure for every photosite at exactly the same instant.
Gloss Differential
Printing, Display & Output
A visible difference in surface sheen between inked and uninked areas of a glossy print.
Glossy Paper
Printing, Display & Output
Paper with a smooth, highly reflective surface that maximises apparent contrast and colour saturation.
Gobo
Lighting & Flash
An opaque cut-out or template placed in a light's beam to cast a shaped pattern onto a subject or background.
Golden Hour
Lighting & Flash
degrees (sun elevation)
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°
Golden Ratio
Composition & Visual Design
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