Subfocus

Subfocus is a term used in multiple disciplines and can refer to both a technical concept in optics and a stage name in music. The exact meaning depends on context, but the common thread is the idea of a focus that is secondary or subordinate to a primary focus.

In optics and photography, subfocus may describe a secondary focal point that arises in certain lens or mirror configurations where light rays converge at a point that is not the main image plane. The term is specialized and its precise meaning varies with optical design, including complex systems such as catadioptric lenses or multi-element assemblies. In practical terms, a subfocus can influence where an image forms or how the sensor is positioned relative to the primary focal plane.

In popular culture, Sub Focus (usually styled as two words) is the stage name of a British electronic music producer and DJ active since the early 2000s. He is associated with genres such as drum and bass and dubstep and has contributed to the development and popularity of these scenes through performances and recorded releases. As with many artist names, references to Sub Focus appear in music journalism and discographies rather than in scientific literature.

Because subfocus spans different fields, readers should consult field-specific sources to determine the precise definition. In optics, it will be a technical concept related to focal points, while in music and contemporary culture it will refer to the artist known for electronic productions.