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The Photographer’s Lexicon
Find the meaning behind the words. Search for a term or explore a category, then return to the photograph or lesson you were reading.
Camera symbols, menu names and available features vary by model; check the manual for your camera.
Aperture, shutter speed and ISO work together when making a photograph. Tap a term to see its meaning without leaving this page.
171 terms
Adobe RGB
An RGB color space with a wider range of some colors than sRGB, especially certain greens. Use compatible color management; assigning it to existing numbers differs from converting into it.
Link to Adobe RGBAF-area mode
The setting that determines where autofocus looks and how focus points are selected. Single-point, zone and automatic-area options vary by camera. This differs from single or continuous autofocus, which describe focusing behavior over time.
Link to AF-area modeAmbient light
Existing scene illumination apart from a particular added light source. In flash photography, ambient and flash contributions can be adjusted separately within equipment limits.
Link to Ambient lightAperture
The lens opening through which light passes. A wider opening admits more light; depth of field also depends on distance, lens and viewing conditions.
Link to ApertureAperture priority
A mode in which you choose aperture and the camera selects shutter time for its metered target. Auto ISO and exposure compensation may also affect the result.
Link to Aperture priorityAPS-C
A sensor size class smaller than full frame, with dimensions that vary by manufacturer. Its crop factor helps compare angle of view; use the actual camera specifications for calculations.
Link to APS-CArchival print
A print intended for long-term preservation using suitable materials and methods. The label alone guarantees no lifespan; ink, paper, storage, display light and handling matter.
Link to Archival printAspect ratio
The relationship between image width and height, such as 3:2 or 1:1. It describes shape, not pixel count or print size.
Link to Aspect ratioAttribution
Credit identifying a creator or source, often required by a license or publication. Giving credit does not itself grant permission to reproduce an image.
Link to AttributionAuto ISO
A setting that lets the camera vary ISO within chosen or automatic limits. Its behavior depends on mode and minimum-shutter settings; it does not create extra light.
Link to Auto ISOAutofocus
A camera system that adjusts focus using measured image information. Select an appropriate focus area and mode; subject detection is helpful but does not guarantee the intended detail will be sharp.
Link to AutofocusBack-button focus
Assigning autofocus activation to a rear control, often separately from the shutter button. It changes control handling, not the camera's underlying focus accuracy.
Link to Back-button focusBacklight
Light reaching a subject primarily from behind relative to the camera. It may create an outline, glow or silhouette; exposure and flare need deliberate attention.
Link to BacklightBit depth
The number of bits used to represent a value, such as a color channel. More levels can support smoother editing, but higher bit depth alone does not guarantee more captured detail or dynamic range.
Link to Bit depthBlue hour
Twilight when the sky often appears strongly blue before sunrise or after sunset. Timing and color vary with location and conditions; the name does not specify a fixed sixty minutes.
Link to Blue hourBokeh
The visual character of out-of-focus areas, including blur shapes and transitions. It describes the quality of blur, rather than simply how shallow the depth of field is.
Link to BokehBounce flash
Flash aimed at a surface so reflected light illuminates the subject. Surface color and distance affect exposure and color; a dark or distant ceiling may be ineffective.
Link to Bounce flashBuffer
Temporary camera memory that holds photographs while they are written to the memory card. Continuous shooting may slow when the buffer fills. File size, camera settings and the speed of writing to the card affect how long a burst can last.
Link to BufferBurning
Selectively making part of an image darker. It can guide attention or preserve tone relationships; excessive darkening can obscure important information.
Link to BurningBurst mode
Recording a series while the shutter control is held or triggered. A high frame rate increases choices but does not replace good timing, and buffers or autofocus limits may apply.
Link to Burst modeCamera shake
Blur caused by camera movement during an exposure. Support, stabilization and shorter times can help, but none freezes a moving subject by itself.
Link to Camera shakeChromatic aberration
A lens-related failure to bring colors into the same position or focus, sometimes seen as fringes. Not every colored edge is this aberration; lighting and processing can also produce artifacts.
Link to Chromatic aberrationCircle of confusion
A blur circle formed when a point is out of focus. Depth-of-field calculations use an acceptable circle size as a threshold; enlargement, viewing distance and eyesight affect what is acceptable.
Link to Circle of confusionClipping
When recorded or processed values reach a limit and distinct tones become indistinguishable. One color channel can clip even when an overall brightness histogram looks acceptable.
Link to ClippingColor gamut
The range of colors a color space or device can describe or reproduce. Colors outside an output’s gamut need mapping; a wider gamut is useful only with suitable color management.
Link to Color gamutColor space
A defined system for describing colors numerically. An RGB number needs a color-space interpretation; a larger space alone does not improve every display or print.
Link to Color spaceColor temperature
A Kelvin-based description of a light's approximate warm-to-cool character. It does not describe every color shift: green and magenta differences also require attention.
Link to Color temperatureCommercial use
Use connected with a business or commercial purpose, such as advertising or product promotion. Meaning depends on the license and legal context; nonprofit status does not automatically make a use noncommercial.
Link to Commercial useComposite
An image assembled from more than one source or substantially combined elements. It can be a valid creative work; label it clearly when context might imply an unchanged record of one scene.
Link to CompositeComposition
How subjects, shapes, edges and space are arranged within the frame. Guidelines can suggest options, but no grid or score makes a composition universally correct.
Link to CompositionCompression
Reducing the amount of data needed to store a file. Lossless compression preserves the encoded data exactly; lossy compression discards some information, and its visible effect depends on the content and settings.
Link to CompressionContinuous autofocus
A mode that keeps updating focus while engaged, commonly used for moving subjects. Focus tracking depends on subject contrast, selected area, lens and camera settings.
Link to Continuous autofocusContrast
Differences in brightness, color or other visual qualities between elements. More contrast is not automatically better; it can strengthen separation or overwhelm subtle detail.
Link to ContrastCopyright
Legal protection for qualifying original creative expression, including photographs. In the United States protection generally begins when the work is fixed; ownership and permitted uses can depend on agreements and legal exceptions.
Link to CopyrightCrop factor
A sensor-size comparison commonly based on a full-frame sensor. It helps compare angle of view with different formats; it does not change the lens's actual focal length.
Link to Crop factorCropping
Removing part of a frame to change composition or fit an output shape. It reduces the remaining pixel dimensions unless resampling adds pixels; preserve the original.
Link to CroppingDecisive moment
An instant when timing, gesture and visual relationships come together meaningfully. It is an interpretive photographic idea rather than one universal peak of action.
Link to Decisive momentDepth layers
Foreground, middle ground and background relationships that suggest space. Overlap, size, contrast and focus can help separate them; visible layers do not reveal exact distances.
Link to Depth layersDepth map
An image or array whose values encode estimated or measured scene depth. The meaning, units and near-to-far direction depend on the source; brighter does not universally mean nearer.
Link to Depth mapDepth of field
The range of subject distances that appears acceptably sharp for particular viewing conditions. It depends on aperture, focus distance, focal length and the chosen sharpness threshold; there is no perfectly sharp zone.
Link to Depth of fieldDiffraction
Light spreading as it passes an opening, which can limit fine detail at small apertures. Stopping down may increase depth of field while reducing peak detail; judge the trade-off at the intended output size.
Link to DiffractionDiffuser
A material that scatters light. Softness depends on the apparent size of the illuminated surface relative to the subject, not simply on attaching diffusion material.
Link to DiffuserDNG
Digital Negative, a publicly documented file format used for some RAW workflows. DNG files can contain different data forms; conversion may not preserve every proprietary camera feature.
Link to DNGDodging
Selectively making part of an image lighter, traditionally during darkroom printing and now in digital editing. Use it to clarify relationships without creating implausible local light.
Link to DodgingDPI
Dots per inch: a measure commonly used for a printer's marking density. Printer dots and image pixels are different, so a printer DPI rating is not the same as the image's PPI.
Link to DPIDSLR
A digital camera with a reflex mirror that directs light to an optical viewfinder. During a typical exposure the mirror moves; model capabilities and live-view behavior vary.
Link to DSLRDynamic range
The span between the brightest and darkest signals a capture or display can represent usefully. A high-contrast scene may exceed that span; lifting shadows cannot recover detail never recorded.
Link to Dynamic rangeEditorial use
Use to inform, report, illustrate commentary or provide context. A license may define it more narrowly; calling a use editorial does not automatically remove copyright or other legal obligations.
Link to Editorial useElectronic shutter
Starting or ending exposure through sensor readout rather than only moving curtains. It can be quiet, but some systems show rolling-shutter distortion or banding under artificial light.
Link to Electronic shutterElectronic viewfinder
A small display showing an electronic preview of the scene. Exposure, color and motion previews depend on settings and may not match the final file exactly.
Link to Electronic viewfinderEXIF
Metadata that may record camera settings, equipment, time and GPS information. It can be missing, stripped or changed; a field is evidence to assess rather than proof of every historical fact.
Link to EXIFExpose to the right
A RAW shooting technique that aims to collect as much light as practical without losing important highlight detail, then adjust brightness during processing. Camera previews may differ from RAW clipping. Allow for subject motion and the depth of field you need; raising ISO alone does not collect more light.
Link to Expose to the rightExposure
The amount of light recorded during a photograph. Aperture and exposure time control the light reaching the sensor; ISO influences how that signal is represented as image brightness.
Link to ExposureExposure bracketing
Recording a series at different exposure levels. It can help preserve options or supply an HDR merge; movement between frames can cause alignment or ghosting problems.
Link to Exposure bracketingExposure compensation
An instruction to make an automatic exposure brighter or darker than the meter suggests. Its effect depends on the shooting mode and whether Auto ISO is active.
Link to Exposure compensationExposure indicator
A scale showing how the current camera settings compare with the exposure recommended by the meter. Zero marks that recommendation, which may differ from the brightness you want. The scale’s direction and display vary by camera.
Link to Exposure indicatorExposure lock
Holding a metered exposure while you recompose or make another frame. Which controls remain fixed depends on the camera and mode; lock behavior should be tested.
Link to Exposure lockF-number
The focal length divided by the diameter of the entrance pupil: the apparent opening seen through the front of the lens. A smaller f-number means a wider relative opening, not a size in millimeters.
Link to F-numberFair use
A United States copyright doctrine permitting some unlicensed uses after a case-specific assessment of four statutory factors. Credit, educational purpose or lack of profit does not automatically make a use fair.
Link to Fair useField of view
The portion of the scene included in a frame. Focal length, sensor size and cropping affect it; a narrower view does not by itself change the perspective of a fixed camera position.
Link to Field of viewFill light
Light used to soften or reveal shadows produced by the main illumination. Too much fill can reduce the shape or contrast you intended.
Link to Fill lightFlash
A brief burst of artificial light used to illuminate a scene. The balance with ambient light depends on flash output, aperture, ISO and the camera's timing limits.
Link to FlashFlash exposure compensation
An adjustment to automatic flash output relative to its metered target. It is distinct from ordinary exposure compensation, although interaction depends on the camera system.
Link to Flash exposure compensationFlash sync speed
The camera's timing limit for exposing the frame evenly with a conventional single flash pulse. Faster settings may need a special mode; check the exact camera and flash combination.
Link to Flash sync speedFlicker reduction
Settings that reduce uneven exposure, color shifts or banding caused by flickering artificial light. Some modes adjust when the shutter fires; others fine-tune shutter speed. Available modes and limitations vary by camera, and no setting removes every kind of flicker.
Link to Flicker reductionFocal length
An optical property expressed in millimeters that helps determine angle of view with a given sensor. Changing focal length changes framing; camera position determines perspective relationships.
Link to Focal lengthFocus
Adjusting the lens so a chosen subject distance is rendered most sharply. Depth of field surrounds that distance; it does not make every distance equally sharp.
Link to FocusFocus breathing
A change in framing or angle of view as a lens changes focus distance. It can affect video and stacked images; its amount depends on the lens and focus range.
Link to Focus breathingFocus peaking
Colored outlines that mark sharp-looking edges as a manual-focusing aid. The result depends on the subject, lens and sensitivity setting; peaking is not a guarantee that the intended detail is precisely focused.
Link to Focus peakingFocus stacking
Combining frames focused at different distances to extend apparent sharpness. Subject movement, breathing and alignment can create artifacts; it is not the same as increasing one frame's depth of field.
Link to Focus stackingFull frame
A digital sensor format approximately matching a 36 × 24 mm frame of 35 mm film. It is a size description, not a promise that every full-frame camera outperforms smaller formats.
Link to Full frameGeotag
Location information attached to an image or record. A camera position and a photographed monument's position may differ; accuracy and privacy should be checked before publication.
Link to GeotagGolden hour
A period near sunrise or sunset often associated with low, warm light. Duration and appearance depend on latitude, season, weather and terrain; there is no guaranteed hour-long window.
Link to Golden hourGraduated ND filter
A filter with a darker area that fades or steps toward clear, used to reduce part of a scene’s brightness. Its transition must suit the scene; an uneven skyline can show unwanted darkening.
Link to Graduated ND filterHard light
Light that produces relatively crisp shadow edges, usually from a small apparent source. The source's size relative to the subject matters, rather than its physical size alone.
Link to Hard lightHDR
High dynamic range: techniques or formats for representing a wider brightness span. Combining exposures is one method; moving subjects can ghost, and HDR does not require an exaggerated look.
Link to HDRHigh-speed sync
A flash mode that supports exposure times faster than conventional sync, often through repeated pulses. It typically reduces effective flash reach and requires compatible equipment.
Link to High-speed syncHighlight
A relatively bright part of an image. A highlight is not necessarily clipped; whether it needs detail depends on the subject and intended result.
Link to HighlightHighlight alert
A playback warning that flashes over bright areas identified as overexposed in the displayed image. Inspect important detail; the camera’s processed preview does not show exactly where the RAW data clips.
Link to Highlight alertHistogram
A graph showing how many pixels fall at each tonal value. It helps evaluate distribution and potential clipping, but no single shape proves a photograph is correctly exposed.
Link to HistogramHue
The color family perceived as red, green, blue and related variations. Hue is distinct from brightness and saturation; changing one can alter the visual relationship of others.
Link to HueHyperfocal distance
A focus distance calculated to make infinity just acceptably sharp for a selected aperture and blur threshold. Near coverage is approximately half that distance; the result is an estimate, not a guarantee of critical sharpness.
Link to Hyperfocal distanceICC profile
Data describing how a color space or device interprets color values. Correct profiles help maintain appearance across devices; a profile cannot make a device reproduce colors outside its capabilities.
Link to ICC profileImage license
Permission to use an image within agreed terms, such as purpose, duration and distribution. Buying a physical print or viewing a website does not itself grant reproduction rights.
Link to Image licenseImage sensor
The light-sensitive component that converts incoming light into electronic signals. Sensor size, design and processing all matter; megapixel count alone does not determine quality.
Link to Image sensorImage stabilization
Lens, sensor or electronic techniques that reduce the effect of camera movement. Effectiveness depends on the system and conditions; stabilization does not stop subject movement. IS, VR and OSS are manufacturer labels; IBIS means in-body stabilization that moves the sensor.
Link to Image stabilizationIntentional camera movement
Deliberately moving the camera during exposure to create expressive blur or abstraction. It is an artistic treatment, not an explanation for accidental shake in a documentary frame.
Link to Intentional camera movementISO
A camera setting that influences how captured light is converted into image brightness. Raising ISO does not increase the light collected; noise and highlight headroom depend on the camera and exposure.
Link to ISOJPEG
A widely supported image format usually using lossy compression to reduce file size. Repeated lossy saving can discard additional information; keep a higher-quality original for editing.
Link to JPEGKey light
The principal light shaping a subject in a planned setup. It need not be the only light or the brightest visible object in the final image.
Link to Key lightLeading lines
Visible lines that encourage the eye to move through a frame. They may lead toward or away from the subject; examine where they actually direct attention.
Link to Leading linesLens correction
Processing that compensates for effects such as distortion, vignetting or chromatic aberration. Corrections may crop or stretch the image; verify the appropriate lens profile and the result.
Link to Lens correctionLens distortion
A lens-related change in shape, such as straight lines bowing outward or inward. It differs from perspective convergence caused by camera position or tilt.
Link to Lens distortionLens flare
Unwanted light scattering or reflecting within the optical system, appearing as haze, ghosts or reduced contrast. Changing angle or using a suitable hood can help, but a hood cannot prevent every flare.
Link to Lens flareLens mount
The system that attaches a lens to a camera, including the physical connection and any electronic communication. Lenses and cameras from the same brand may use different mounts. Check the exact mount, camera, lens and any required adapter.
Link to Lens mountLighting ratio
A comparison of illumination levels used to describe a lighting setup. State which light or side is being compared; key-to-fill and lit-side-to-shadow ratios are not interchangeable.
Link to Lighting ratioLocal contrast
Differences in tone within nearby regions, often adjusted with clarity or similar controls. Increasing it can emphasize texture but may create halos or harsh transitions.
Link to Local contrastLuminance
A measure of light emitted or reflected in a direction, or a brightness-related component used in image processing. A software luminance slider may affect selected colors; it is not interchangeable with ISO or exposure.
Link to LuminanceMacro photography
Close photography that reveals small subjects, often using lenses capable of high reproduction ratios. The word macro is used loosely in marketing; check actual magnification.
Link to Macro photographyMagnification
How much larger an image or detail appears relative to a stated reference. Specify whether you mean sensor reproduction ratio, print enlargement or viewer zoom; the numbers are not interchangeable.
Link to MagnificationManual exposure mode
A mode in which you select aperture and shutter time. With Auto ISO enabled, image brightness may still change automatically; manual mode does not necessarily mean every control is fixed.
Link to Manual exposure modeMask
A selection that limits an adjustment to part of an image. Soft edges can blend transitions; poor masks can create halos or change areas unintentionally.
Link to MaskMechanical shutter
A shutter using moving curtains or blades to control exposure. It has camera-specific speed and flash limits, and its moving parts can introduce sound or vibration.
Link to Mechanical shutterMegapixel
One million pixels. An image's pixel count helps describe output potential, but lens detail, focus, noise and processing also affect usable resolution.
Link to MegapixelMetadata
Information describing a file, such as capture settings, captions, rights or location. Fields can be missing or edited, and metadata is not a substitute for a verified record.
Link to MetadataMetering
How a camera measures scene brightness to recommend an exposure. A meter does not know your artistic intent, and very bright or dark subjects may need compensation.
Link to MeteringMicro Four Thirds
A camera system commonly using a sensor around 17.3 × 13 mm and a 4:3 native shape. Its roughly 2× format comparison describes field of view, not a doubling of actual focal length.
Link to Micro Four ThirdsMirrorless camera
An interchangeable-lens camera without a reflex mirror, usually showing a sensor-based preview. The absence of a mirror does not by itself guarantee better image quality.
Link to Mirrorless cameraModel release
An agreement permitting specified uses of a person’s likeness. Its scope depends on the text and applicable law; it is separate from copyright ownership in the photograph.
Link to Model releaseMonitor calibration
Adjusting a display toward chosen targets, commonly followed by profiling its measured behavior. Brightness, room light and profile use still influence how reliably screen appearance predicts a print.
Link to Monitor calibrationMotion blur
Smearing caused by subject or camera movement during an exposure. It may express motion deliberately; image appearance alone does not establish the exact shutter time or cause.
Link to Motion blurMount adapter
An accessory that connects specified lens and camera mounts. Autofocus, aperture control, stabilization and sensor coverage depend on the exact combination. An adapter does not make every lens from a brand compatible with every camera.
Link to Mount adapterMulti-zone metering
Exposure measurement that evaluates multiple areas of a scene. Nikon Matrix and Canon Evaluative are manufacturer-specific implementations, not identical algorithms. They provide a general starting point, but difficult lighting may still require exposure compensation.
Link to Multi-zone meteringMultiple exposure
Combining two or more exposures into one image, in camera or through editing. Blending behavior varies; disclose the combination when viewers might assume a single recorded moment.
Link to Multiple exposureNegative space
Less busy space around or between important elements. It can convey scale, calm or direction and is an active part of a composition rather than wasted space.
Link to Negative spaceNeutral-density filter
A filter designed to reduce light without substantially changing color, allowing longer exposure or wider aperture. Real filters can add color casts or unevenness; check strength units carefully.
Link to Neutral-density filterNoise
Unwanted variation in brightness or color, often easiest to see in smooth or dark areas. Low captured light, processing and camera electronics all matter; ISO alone does not explain every noisy image.
Link to NoiseNoise reduction
Processing that suppresses unwanted brightness or color variation. Strong reduction can also remove fine texture; compare at the intended display or print size.
Link to Noise reductionNon-destructive editing
A workflow that preserves source image data while recording adjustable changes or working on separate copies. Keep backups too; reversible edits do not protect against losing the original file.
Link to Non-destructive editingOptical viewfinder
A viewfinder that shows the scene through an optical path. Its view may differ from the captured frame or exposure; check the camera's coverage and indicators.
Link to Optical viewfinderOutput sharpening
Sharpening tailored to final image dimensions and the destination, such as a screen, matte paper or glossy paper. It is separate from sharpening during editing and should be judged at the intended output size.
Link to Output sharpeningPanning
Moving the camera with a subject during exposure to keep some subject detail readable while the background blurs. Results depend on speed, direction, shutter time and practice.
Link to PanningPanorama
A photograph with a wide visual span, often assembled from overlapping frames. Stitching can introduce seams or parallax errors; a panorama can also be made from a single wide frame.
Link to PanoramaParallax
A shift in the apparent alignment of objects when viewpoint changes. It can cause panorama stitching errors, particularly with nearby subjects; rotate around a suitable point when precision matters.
Link to ParallaxPerspective
How the camera position makes near and far subjects appear in relation to one another. Moving the camera changes those relationships; zooming from the same position principally changes framing.
Link to PerspectivePixel dimensions
An image's width and height in pixels. They determine how many pixels are available; changing a PPI label without resampling does not create more image detail.
Link to Pixel dimensionsPNG
A raster image format supporting lossless compression and transparency. It is useful for graphics and some web images but is not a camera RAW format.
Link to PNGPolarizing filter
A filter that selectively transmits polarized light to change some reflections or sky tones. Effect varies with angle and surface; it cannot remove every reflection and may make wide skies uneven.
Link to Polarizing filterPPI
Pixels per inch: how image pixels are allocated to a physical output size. With resampling off, changing PPI changes the proposed print size, not the number of pixels or captured detail.
Link to PPIPrime lens
A lens with a fixed focal length. You change framing by moving or cropping; a prime is not automatically sharper than every zoom.
Link to Prime lensPrint proof
A test output used to judge color, tone, detail and layout before final production. Its usefulness depends on matching the intended process, material and viewing light.
Link to Print proofProperty release
An agreement addressing specified uses of images of property or associated rights. Whether one is needed depends on the subject, use, agreements and jurisdiction; there is no universal release requirement for every building.
Link to Property releasePublic domain
Material not protected by copyright in the relevant jurisdiction. Public availability is not the same thing; other rights or restrictions may still affect use.
Link to Public domainRAW
A family of camera formats retaining sensor data and capture information for later processing. RAW is not a finished display image or a guarantee of no compression; support and data retention vary by camera.
Link to RAWRear-curtain sync
Firing flash near the end of an exposure, before the final curtain closes. With moving subjects and visible ambient light, it can place the motion trail before the flash-lit position.
Link to Rear-curtain syncReflector
A surface used to redirect existing light onto a subject. Its distance, angle, size and color affect the result; it does not generate light by itself.
Link to ReflectorRelative depth
An estimate of how scene regions lie nearer or farther apart without a verified physical distance scale. A single-image prediction may be wrong; it is not a survey or a measurement in feet or meters.
Link to Relative depthRendering intent
The method used to translate colors between color spaces, especially when the destination cannot reproduce all the source colors. Perceptual and relative colorimetric use different approaches. Compare their results using the intended output profile.
Link to Rendering intentReproduction ratio
The size of a subject's image on the sensor compared with its real size. At 1:1, a 10 mm subject forms a 10 mm image; screen enlargement is a different measurement.
Link to Reproduction ratioResampling
Changing pixel dimensions by calculating new pixel values. Enlarging can help fit an output, but it does not recover the original scene information that was never captured.
Link to ResamplingResolution
The ability to distinguish detail, or a size measure when a workflow uses the term that way. State pixel dimensions or PPI explicitly; megapixels alone do not describe resolved optical detail.
Link to ResolutionRim light
Light that outlines part of a subject's edge and helps separate it from the background. Its placement and strength matter; bright edges can also distract.
Link to Rim lightRolling shutter
Recording different rows of the sensor at different times. Fast movement can distort shapes, and changing light can create bands; the severity depends on readout speed.
Link to Rolling shutterRoyalty-free
A licensing model that generally allows repeated permitted uses without a separate royalty for each use. The license may cost money and still impose restrictions; royalty-free does not mean copyright-free.
Link to Royalty-freeRule of thirds
A framing guide that divides an image into three equal parts in each direction. Placing elements near lines or crossings is one option; centering and other arrangements can be equally effective.
Link to Rule of thirdsSaturation
The perceived strength or purity of a color relative to a neutral tone. Increasing it can create clipping or unnatural color; more saturation does not automatically increase meaning.
Link to SaturationSensor format
A description of a sensor's size or size class. Format affects field of view with a given lens; labels such as APS-C do not always imply identical dimensions across brands.
Link to Sensor formatShadow
A relatively dark part of an image or a region receiving less light. Dark tones can be intentional; recovering them may reveal noise or limited recorded detail.
Link to ShadowSharpening
Processing that increases apparent edge contrast to make detail look clearer. It cannot reliably restore information lost to severe blur and can produce halos when overdone.
Link to SharpeningShutter priority
A mode in which you choose exposure time and the camera selects aperture for its metered target. Lens aperture limits can prevent the requested brightness.
Link to Shutter priorityShutter speed
The exposure time, commonly expressed in seconds or fractions of a second. Shorter times reduce recorded motion blur; sharpness still depends on focus, subject movement and camera stability.
Link to Shutter speedSilhouette
A subject shown mainly as a dark shape against a brighter background. Reduced subject detail is intentional when shape carries the photograph.
Link to SilhouetteSingle autofocus
A mode that normally focuses once and holds that distance while the shutter control stays engaged. It suits still subjects; a moving subject may leave the focused range.
Link to Single autofocusSoft light
Light that produces gradual shadow transitions, usually from a large apparent source. Soft light can still create strong overall contrast or deep shadows.
Link to Soft lightSoft proofing
A screen simulation of an intended print or output using a profile and settings. It is a guide, not a perfect substitute for a physical proof viewed under appropriate light.
Link to Soft proofingSoftbox
An enclosed light modifier with a diffusing front surface. Size, distance and orientation affect shadow softness and coverage; a small distant softbox can still act relatively hard.
Link to SoftboxSpot metering
Exposure measurement from a small part of the frame. The measured area’s size and whether it follows the selected focus point vary by camera. Metering a subject still requires judgment about how light or dark it should appear.
Link to Spot meteringsRGB
A widely supported RGB color space commonly used for web and general sharing. Correct conversion and profile handling matter; a browser or display may still show differences.
Link to sRGBStop
A change that doubles or halves light exposure, or an equivalent change in a camera control. One stop of ISO changes image brightness settings without itself adding light to the sensor.
Link to StopSubject detection
Recognition features that help autofocus select and track supported subjects or details such as eyes. Supported subject types and behavior vary by camera and settings; detection does not guarantee that the intended subject will be sharp.
Link to Subject detectionSymmetry
A balanced arrangement in which parts correspond across an axis or center. It can create order, while a deliberate interruption may add emphasis.
Link to SymmetryTelephoto lens
In common photographic use, a lens giving a narrow angle of view and enlarged framing of distant subjects. Optical telephoto design is more specific; apparent compression chiefly follows camera distance.
Link to Telephoto lensTIFF
A flexible image format often used for high-quality editing or print delivery. It can support lossless storage and high bit depth, but compression and compatibility depend on the chosen options.
Link to TIFFTTL flash
Through-the-lens automatic flash control that estimates suitable output, commonly using a preflash. Subject reflectance and framing can mislead it; compensation may be needed.
Link to TTL flashVibrance
An editing control that usually adjusts less-saturated colors more than already strong colors. Exact behavior is software-dependent; it is not a standardized physical quantity.
Link to VibranceVignetting
A reduction in brightness toward image corners. It may come from optics, obstructions or editing and can be corrected or used deliberately.
Link to VignettingVisual weight
How strongly an element attracts attention within a frame. Brightness, contrast, color, size and recognizable subjects contribute; importance varies with context and the viewer.
Link to Visual weightWhite balance
An adjustment to how an image renders neutral colors under different illumination. Mixed lighting may not be corrected by one setting, and neutral rendering is not always the desired creative result. Auto white balance (AWB) lets the camera estimate the setting.
Link to White balanceWide-angle lens
A lens that gives a relatively wide angle of view for the chosen sensor format. Strong near-to-far size differences usually result from a close viewpoint, rather than focal length alone.
Link to Wide-angle lensZebra display
Stripes shown in the shooting display over areas that reach a selected brightness level. Their meaning depends on the threshold and camera settings. Zebra stripes do not always indicate clipped highlights and do not appear in the recorded photograph.
Link to Zebra displayZoom lens
A lens whose focal length can be adjusted over a range. Zooming changes field of view from a fixed position; moving the camera changes perspective.
Link to Zoom lensReferences and further reading
Exposure
- Nikon — Understanding Maximum Aperture
- Nikon — Understanding Auto ISO
- Nikon — Photo Information (histograms)
Cameras & capture, Focus & optics
- ZEISS — Depth of Field and Manual Focusing
- ZEISS — Depth of Field and Bokeh
- Nikon — N70 Manual (hyperfocal)
- Adobe — Perspective Photography
Motion & light, Lighting & studio
- Nikon — SB-910 Speedlight Manual
- Nikon — A Guide to Lens Filters
- Nikon — Graduated Neutral Density Filters
- Nikon School — Controlling Light
Composition & practice
- Adobe — Perspective Photography
- Dynamic Depth Photo — Photography Concepts (site vocabulary)
- Dynamic Depth Photo — Learning Center (site vocabulary)
Color & editing, Editing & files
- Adobe — Color Profiles
- Adobe — Color Management for Online Viewing
- Adobe — Understanding Digital RAW Capture
- Adobe — Supported Image File Formats
- Adobe — Digital Negative
- Adobe — Digital Asset Metadata
Output & depth tools
- Adobe — Image Size, Resolution and Resampling
- Adobe — Print Resolution
- Epson — Print Permanence
- Depth Anything V2 — Official Research Repository
Image use & rights
- U.S. Copyright Office — Photographers
- U.S. Copyright Office — What Is Copyright?
- U.S. Copyright Office — Fair Use
- Adobe Stock — License Terms
- Adobe — Royalty-Free Meaning
- ASMP — Document Library and Talent Releases
Camera controls and practical workflow
- Nikon — Exposure indicators
- Canon — Highlight alerts
- Sony — Zebra patterns
- Sony — Focus peaking
- Nikon — AF-area modes
- Canon — Subject and eye detection
- Nikon — Metering modes
- Canon — Evaluative and spot metering
- Canon — Lens compatibility
- Canon — Mount adapters
- RawDigger — RAW exposure, histograms and highlight headroom
- Nikon — Flicker reduction
- Nikon — High-frequency flicker reduction
- Nikon — Burst shooting and memory buffer
- Adobe — Output sharpening
- Adobe — Rendering intents