The Heliopan 105mm KB 12 (80B) Filter is a precision color-correction tool designed for photographers working with tungsten and halogen lighting. This deep blue filter effectively converts warm light sources—such as 3400K halogen and photoflood lamps—to daylight-balanced temperatures, enabling accurate color reproduction with daylight-balanced film and digital sensors. Ideal for studio and interior photography, it delivers natural color fidelity under artificial lighting while retaining subtle warmth for mood when paired with weaker tungsten sources. Heliopan's slim-mount design reduces vignetting and ensures compatibility across various lens sizes, backed by the precision engineering Munich-based Heliopan Lichtfilter-Technik is known for.