Photography

Lenses & optics

Terms

8 terms

  • Angle of view

    Angle of view is the angular extent of a scene that a lens and sensor capture, set by focal length and sensor size and measured in…

  • Bokeh

    Bokeh in photography is the aesthetic quality of out-of-focus areas, shaped by lens design, aperture, distance and optical aberrations.

  • Chromatic aberration

    Chromatic aberration is a lens fault in which different wavelengths focus at different points, causing colored fringes along high-contrast edges.

  • Crop factor

    Crop factor is the ratio between the full frame diagonal and a smaller sensor diagonal, used to compare angle of view across lenses and formats.

  • Depth of field

    Depth of field is the distance range in front of and behind the focus point that looks acceptably sharp in a photograph, set by aperture, distance…

  • Diffraction

    Diffraction in photography is the spreading of light as it passes the lens aperture, which softens fine detail as the lens is stopped down to small…

  • Focal length

    Focal length is the optical distance, in millimeters, that sets a lens's magnification and, with sensor size, its angle of view in photography.

  • Hyperfocal distance

    Hyperfocal distance is the closest focus distance at which a lens keeps everything from about half that distance to infinity acceptably sharp.