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Results for “Depth of Field”

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Focus & Depth of Field

Focus Shift

A movement of the plane of sharpest focus as a lens is stopped down, caused by residual spherical aberration.

mm
Genres, Movements & Theory

Group f/64

A short-lived association of West Coast American photographers formed in 1932 to advocate sharp, unmanipulated photography.

Genres, Movements & Theory

Landscape Photography

Photography of natural or altered land, sea and sky, often concerned with light, weather and a sense of place.

Optics, Lenses & Filters

Macro Lens

A lens corrected for close focusing that reproduces a subject at life size or larger on the sensor.

m = image size / subject size magnification ratio
Genres, Movements & Theory

Macro Photography

Photography at magnifications approaching or exceeding life size, revealing detail invisible to the unaided eye.

m ≥ 1:1 magnification ratio
Cameras, Formats & Systems

Medium Format

Any format larger than 35 mm but smaller than 4×5 inches, covering film frames from 6×4.5 to 6×17 cm and digital sensors around 44×33 mm.

mm
Motion, Video & Creative Techniques

Photogrammetry

Deriving three-dimensional measurements and models from a set of overlapping photographs.

count
Motion, Video & Creative Techniques

Photomicrography

Photography through a microscope, recording subjects at magnifications far beyond macro.

× magnification
Motion, Video & Creative Techniques

Rack Focus

Shifting focus from one subject to another during a shot, moving the viewer's attention deliberately.

seconds
Focus & Depth of Field

Scheimpflug Principle

The rule that when a lens is tilted, the subject plane, lens plane and image plane all intersect along a single common line.

Subject, lens and image planes share one line degrees
Exposure & Metering

Shutter Priority

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

Exposure & Metering

Shutter Speed

The length of time the shutter stays open, controlling both total exposure and how much subject or camera movement is recorded as blur.

t = 1 / denominator seconds
Exposure & Metering

T-stop

A measured aperture value that accounts for the light a lens actually transmits, rather than the geometric ratio an f-number implies.

T = N / √(transmittance) T-stops
Cameras, Formats & Systems

Crop Factor

The ratio between a sensor's diagonal and that of full frame, used to convert focal lengths into their full-frame equivalents.

Crop factor = 43.3 mm / sensor diagonal × multiplier
Optics, Lenses & Filters

Diffraction

The spreading of light waves as they pass the edge of an aperture, which softens the image at small f-numbers.

d = 2.44 × λ × N µm
Exposure & Metering

Program Mode

An automatic mode, marked P, in which the camera selects both aperture and shutter speed while leaving other controls to the photographer.