Image artifact that scattered or flared light within a lens system produces
Scheme of lens flareLight coming from a narrow angle may be "trapped" and reflected between the surfaces of the lens elements.A lens flare
A lens flare happens when light is scattered or flared in a lens system, often in response to a bright light, producing a sometimes undesirable artifact in the image. This happens through light scattered by the imaging mechanism itself, for example through internal reflection and forward scatter from material imperfections in the lens. Lenses with large numbers of elements such as zooms tend to have more lens flare, as they contain a relatively large number of interfaces at which internal scattering may occur. These mechanisms differ from the focused image generation mechanism, which depends on rays from the refraction of light from the subject itself.
There are two types of flare: visible artifacts and glare across the image. The glare makes the image look "washed out" by reducing contrast and color saturation (adding light to dark image regions, and adding white to saturated regions, reducing their saturation). Visible artifacts, usually in the shape of the aperture made by the iris diaphragm, are formed when light follows a pathway through the lens that contains one or more reflections from the lens surfaces.
Flare is particularly caused by very bright light sources. Most commonly, this occurs when aiming toward the Sun (when the Sun is in frame or the lens is pointed sunward), and is reduced by using a lens hood or other shade. For good-quality optical systems, and for most images (which do not have a bright light shining into the lens), flare is a secondary effect that is widely distributed across the image and thus not visible, although it does reduce contrast.
A lensflare happens when light is scattered or flared in a lens system, often in response to a bright light, producing a sometimes undesirable artifact...
lens hood or lens shade is a device used on the front end of a lens to block the Sun or other light source(s) to prevent glare and lensflare. Lens hoods...
the lens renders out-of-focus points of light". Differences in lens aberrations and aperture shape cause very different bokeh effects. Some lens designs...
A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body...
single discrete peak, rather than continuous oscillation). In photography, lensflare is a defect where various circles can appear around highlights, and with...
functions. Lens hood: used on the end of a lens to block the sun or other light source to prevent glare and lensflare (see also matte box). Lens cap: covers...
A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole)—effectively a light-proof box with a small hole in...
A telephoto lens, also known as telelens, is a specific type of a long-focus lens used in photography and cinematography, in which the physical length...
large medium Film speed Focal length Guide number Hyperfocal distance Lensflare Metering mode Perspective distortion Photograph Photographic printing...
In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens), typically with a maximum aperture from f2...
large medium Film speed Focal length Guide number Hyperfocal distance Lensflare Metering mode Perspective distortion Photograph Photographic printing...
lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for...
aperture of an optical system (including a system consisted of a single lens) is a hole or an opening that primarily limits light propagated through the...
contrast and resistance to lensflare. Zeiss also pioneered glass coating, and before the war coated lenses were offered. After lens coating became universal...
aberration. Similar colored fringing around highlights may also be caused by lensflare. Colored fringing around highlights or dark regions may be due to the...
when using an anamorphic camera lens that do not occur when using an ordinary spherical lens. One is a kind of lensflare that has a long horizontal line...
reflecting off dust particles, a camera strap or hair close to the lens, lensflare, pareidolia, or in modern times, deceptions using smart phone applications...
images. A slide copier is a simple optical device that can be fastened to the lens mount of a camera to enable slide duplicates to be made. Whilst these devices...
the lens. 360-degree cameras with two lenses are probably the most common type, as they can accommodate a full 360-degree angle with two lenses facing...
opposed to a fixed-focal-length (FFL) lens (prime lens). A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its...
Global Information
