An optical component, typically made of glass or optical-grade plastic, shaped to refract light in a controlled manner. Lenses converge or diverge beams to form images, concentrate light into a tight beam, or spread it across a specific area. They are the primary tool for beam control in everything from theatrical spotlights to LED streetlights.
Swap the 19-degree lens for a 36-degree so we can cover the whole choir.
Related terms
Optic
A component designed to guide, shape, or modify light within a luminaire.
Fresnel
A soft-edged spotlight with a stepped Fresnel lens whose beam can be adjusted from spot to flood.
Condenser
An optical assembly that gathers divergent light from a source and concentrates it into a directed beam.
Beam angle
The angle across a light's beam at which intensity has fallen to 50 percent of its center value.