(astronomy) A massive body that produces distorted, magnified or multiple images of more distant objects when its gravitational field bends the path of light rays.

(physics) a magnetic field with axial symmetry capable of converging a beam of charged particles of uniform velocity and of forming images of objects placed in the path of such beam

A stray patch of brightness in a photographic image resulting from aberrant refractions or reflections within the lens due to an exceptionally bright light source, sometimes one just outside the image proper.

(photography) A lens that allows a camera to focus at very close range to photograph small objects.

(photography) A camera lens that is bundled with a camera body, usually at a discount price.

A lens with a number of facets, causing an object to appear multiplied many times.

(optics, astronomy) A diverging lens which, used in series with other optics in an optical system, increases the effective focal length of an optical system as perceived by all components that are after it in the system.

(photography) a small brush used to clean dust off camera lenses.

plural of lens brush

A quartz crystal lens used in spectacles.