Terms starting with R
39 terms · page 1 of 2
Rack Focus
Shifting focus from one subject to another during a shot, moving the viewer's attention deliberately.
Post-Processing & RetouchingRadial Filter
A local adjustment applied within or outside an elliptical area, with a feathered edge.
Lighting & FlashRadio Trigger
A transmitter on the camera and receivers on the flashes that fire them by radio signal.
Files, Metadata & WorkflowRAID
An array of drives configured for redundancy, speed or both, presented to the system as a single volume.
Post-Processing & RetouchingRange Mask
A refinement that limits a local adjustment to pixels within a specified colour, luminance or depth range.
Cameras, Formats & SystemsRangefinder Camera
A camera focused by aligning two images in a coupled optical system, viewed through a bright-line finder separate from the lens.
Printing, Display & OutputRaster Image Processor
Software that converts an image into the precise droplet pattern a printer lays down, replacing the standard driver.
Sensors & Digital CaptureRaw Bit Depth
The number of bits used to record each photosite's value in a raw file, determining how many tonal levels are captured.
Post-Processing & RetouchingRaw Conversion
The process of turning a camera's raw sensor data into a viewable image by applying demosaicing, white balance, colour profile and tone…
Sensors & Digital CaptureRaw Data
The minimally processed values read from the sensor, before demosaicing, white balance or tone rendering.
Files, Metadata & WorkflowRaw File Format
A camera-specific file holding minimally processed sensor data together with the metadata needed to interpret it.
Motion, Video & Creative TechniquesRaw Video
Video recorded as minimally processed sensor data, with white balance, colour and tone left adjustable afterwards.
Sensors & Digital CaptureRead Noise
Noise introduced by the process of reading and digitising the sensor's signal, independent of how much light was captured.
Sensors & Digital CaptureReadout Speed
How quickly a sensor's entire array can be transferred off the chip, usually quoted as the time to scan the full frame.
Lighting & FlashRear-curtain Sync
A setting that fires the flash at the end of the exposure rather than the beginning, so motion trails follow the subject rather than…
Colour & Colour ManagementRec. 2020
The very wide colour space defined for ultra-high-definition television and high dynamic range delivery.
Colour & Colour ManagementRec. 709
The colour space and transfer function standard for high-definition television, sharing its primaries with sRGB.
Exposure & MeteringReciprocal Rule
A handholding guideline stating that the slowest safe shutter speed is roughly one over the focal length in use.
Film, Darkroom & Historic ProcessesReciprocity Failure
The breakdown of the reciprocity law at very long or very short exposures, where film needs more light than calculation predicts.
Exposure & MeteringReciprocity Law
The principle that exposure depends only on the product of light intensity and time, so halving one and doubling the other leaves the…
Lighting & FlashRecycle Time
The interval a flash needs to recharge its capacitor to full power after firing.
Exposure & MeteringReflected-light Metering
Measuring the light bouncing off a subject toward the camera, which is what every built-in camera meter does.
Motion, Video & Creative TechniquesReflection Photography
Using reflective surfaces — water, glass, metal, screens — as a compositional device rather than a nuisance.
Lighting & FlashReflector
A panel that bounces existing light back into the shadows, adding fill without a second light source.