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Results for “Depth of Field”

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Focus & Depth of Field

Depth of Field

The range of distances in front of and behind the plane of focus that appears acceptably sharp in the final image.

DoF ≈ 2u²Nc / f² m
Cameras, Formats & Systems

Depth of Field Preview

A control that stops the lens down to the working aperture so the actual depth of field can be seen before exposure.

Focus & Depth of Field

Depth of Field Scale

Markings on a lens barrel showing the near and far limits of sharpness for each aperture at the set focus distance.

m / ft
Focus & Depth of Field

Deep Depth of Field

A wide zone of sharpness in which foreground, subject and background all hold detail.

m
Focus & Depth of Field

Shallow Depth of Field

A narrow zone of sharpness that isolates the subject against a strongly blurred foreground and background.

m
Exposure & Metering

Aperture

The adjustable opening inside a lens that controls how much light passes through to the sensor, and with it the depth of field.

N = f / D f-stops (EV)
Focus & Depth of Field

Focus Stacking

Combining several frames focused at different distances into one image with depth of field no single exposure could achieve.

count
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
Focus & Depth of Field

Hyperfocal Distance

The focus distance that yields the greatest depth of field, extending from half that distance out to infinity.

H = f² / (N × c) + f m
Composition & Visual Design

Isolation

Separating a subject from its surroundings so it reads alone, using depth of field, framing, tone or timing.

Cameras, Formats & Systems

Pinhole Camera

A lensless camera that forms an image through a tiny aperture, giving infinite depth of field and extremely long exposures.

d = √(2 × λ × f) mm
Cameras, Formats & Systems

Sensor Format

The physical dimensions of a camera's sensor, which set its angle of view, depth of field characteristics and light-gathering area.

Area ∝ width × height mm
Focus & Depth of Field

Zone Focusing

Presetting a lens to a distance and aperture whose depth of field covers the range the subject will occupy, then shooting without focusing…

m
Cameras, Formats & Systems

35 mm Format

The film format using 35 mm perforated stock with a 36 by 24 millimetre frame, which became the dominant standard of the twentieth century.

mm
Cameras, Formats & Systems

Action Camera

A small, ruggedised, wide-angle camera built to be mounted on a body, vehicle or piece of equipment.

Exposure & Metering

Aperture Priority

A semi-automatic mode, marked A or Av, in which the photographer sets aperture and ISO while the camera chooses shutter speed.

Exposure & Metering

Auto ISO

A camera mode that lets the body select sensitivity automatically within limits the photographer sets, usually with a minimum shutter speed.

ISO
Focus & Depth of Field

Depth of Focus

The tolerance in sensor position, on the camera side of the lens, within which the image stays acceptably sharp.

≈ 2Nc µm
Optics, Lenses & Filters

Diffraction Limit

The aperture beyond which diffraction, rather than lens design or sensor resolution, becomes the factor limiting sharpness.

N_limit ≈ pixel pitch / 1.22λ f-stops
Genres, Movements & Theory

Environmental Portrait

A portrait made in a setting that tells the viewer something about the subject's life, work or identity.

Exposure & Metering

Equivalent Exposure

Any different combination of aperture, shutter speed and ISO that yields identical image brightness.

N₁²/t₁ = N₂²/t₂ stops (EV)
Cameras, Formats & Systems

Equivalent Focal Length

The full-frame focal length that would give the same angle of view as a given lens on a smaller format.

f_equiv = f × crop factor mm
Exposure & Metering

Exposure Triangle

The teaching model that links aperture, shutter speed and ISO as three interdependent controls, where changing one requires compensating…

Aperture ↔ Shutter ↔ ISO stops
Focus & Depth of Field

Eye AF

A refinement of face detection that locates and focuses on the eye itself, and usually lets the photographer choose which one.