AF assist lamp

Some brands came to idea how to improve a AF system in low light situations. They realised that idea with AF Assist lamp which emite a light of normal or infrared spectar. IR (infrared) light is better becouse it is hardly noticed and not dictracting like normal light. This is important for portraits and other photos with live objects. The range of AF Assist lamp is limited and AF assist lamp can work well with object closer than 4m. Extern flash lights have autonomic source of IR light with greater range.