Search results for “Aperture”

Lens Mount Cameras, Formats & Systems The mechanical and electronic interface that couples a lens to a camera body.

Macro Lens Optics, Lenses & Filters magnification ratio A lens corrected for close focusing that reproduces a subject at life size or larger on the sensor. m = image size / subject size

Macro Photography Genres, Movements & Theory magnification ratio Photography at magnifications approaching or exceeding life size, revealing detail invisible to the unaided eye. m ≥ 1:1

Modelling Light Lighting & Flash W A continuous lamp built into a flash head that previews where the shadows will fall.

Neutral Density Filter Optics, Lenses & Filters stops (EV) A grey filter that reduces the amount of light entering the lens uniformly across all wavelengths, without altering colour. Stops = log₂(filter factor)

Pixel Pitch Sensors & Digital Capture µm The centre-to-centre distance between adjacent photosites on a sensor. Pitch = sensor width / horizontal pixels

Plane of Focus Focus & Depth of Field m The flat surface, parallel to the sensor, at which the subject is rendered with maximum sharpness.

Prime Lens Optics, Lenses & Filters mm A lens with a single fixed focal length that cannot be zoomed.

Prism Refraction Motion, Video & Creative Techniques Holding a prism, glass or crystal in front of the lens to bend light and introduce reflections, flares and repeated fragments.

Shallow Depth of Field Focus & Depth of Field m A narrow zone of sharpness that isolates the subject against a strongly blurred foreground and background.

Shaped Bokeh Motion, Video & Creative Techniques mm (aperture cut-out) Rendering out-of-focus highlights as a chosen shape by placing a cut-out mask over the lens.

Shot Noise Sensors & Digital Capture e⁻ (electrons) The unavoidable randomness in the arrival of photons, which produces grain even from a perfect sensor. SNR = √N

Teleconverter Optics, Lenses & Filters × magnification A supplementary optic mounted between lens and body that multiplies focal length at the cost of light and, usually, sharpness. N_new = N × magnification

Tilt-shift Lens Optics, Lenses & Filters degrees, mm A lens that can be tilted or shifted relative to the sensor, controlling the plane of focus and correcting converging verticals. Scheimpflug: subject, lens and film planes meet on a line

Zoom Lens Optics, Lenses & Filters mm A lens whose focal length can be varied continuously across a range while holding focus. Zoom ratio = f_max / f_min

Stop Exposure & Metering stops (EV) The fundamental unit of exposure change: one stop doubles or halves the amount of light reaching the sensor. 1 stop = ×2 or ÷2 light

Results for “Aperture”