Results for “Aperture”
5 terms
Camera Obscura
Film, Darkroom & Historic Processes
A darkened room or box in which a small aperture projects an inverted image of the outside world onto an inner surface.
Cat's-eye Bokeh
Optics, Lenses & Filters
The lens-shaped, off-round rendering of out-of-focus highlights near the frame corners, caused by optical vignetting.
Catadioptric (Mirror) Lens
Optics, Lenses & Filters
mm
A long lens that folds its light path with curved mirrors as well as glass, achieving great focal length in a short, light barrel.
Coma
Optics, Lenses & Filters
An aberration that renders off-axis points of light as asymmetric comet-shaped smears rather than dots.
Crop Factor
Cameras, Formats & Systems
× multiplier
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