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Cameras, Formats & Systems

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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

Rangefinder Camera

A camera focused by aligning two images in a coupled optical system, viewed through a bright-line finder separate from the lens.

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
Cameras, Formats & Systems

Shutter Actuation Count

The running total of exposures a camera's mechanical shutter has made, recorded in the file metadata.

count
Cameras, Formats & Systems

Single-lens Reflex (SLR)

A camera design in which a hinged mirror reflects the taking lens's image up into the viewfinder, then swings clear when the shutter fires.

Cameras, Formats & Systems

Smartphone Camera

A camera module in a phone, where computational processing compensates for the physical limits of a very small sensor and lens.

Cameras, Formats & Systems

Tripod

A three-legged support that holds the camera rigid for long exposures, precise framing or heavy lenses.

kg (load rating)
Cameras, Formats & Systems

Twin-lens Reflex (TLR)

A medium-format camera with two stacked lenses, one for viewing through a waist-level ground glass and one for taking the picture.

Cameras, Formats & Systems

View Camera

A large-format camera consisting of a lens board and film back joined by a flexible bellows, both adjustable in position and angle.

Cameras, Formats & Systems

Viewfinder Coverage

The percentage of the recorded image that is visible through the viewfinder.

Coverage = finder area / frame area × 100 %
Cameras, Formats & Systems

Viewfinder Magnification

How large the finder image appears compared with the naked eye, quoted for a 50 mm lens focused at infinity.

× magnification
Cameras, Formats & Systems

Weather Sealing

Gaskets and overlapping construction that resist the entry of dust and moisture into a camera or lens.