1. a bright ring or halo of light appearing around a bright object in a photograph, caused by light scattering in the photographic emulsion
Usage: photography
2. the spreading of light beyond its proper boundaries, creating a hazy or blurred effect
Usage: optics

Examples

• The photographer noticed halation around the street lamps in the night shots.
• Anti-halation backing on film helps prevent light from reflecting back through the emulsion.
• The bright sun caused severe halation in the portrait, creating an unwanted halo effect.
• Digital cameras can still experience halation when shooting very bright light sources.
• The halation around the headlights made it difficult to see the car’s details in the photograph.
• Modern lens coatings help reduce halation and improve image clarity.