This biconcavelens measures 50mm and has a focal lenght of50mm. The lens is made of glass and is doubleconcave. The lens is made ofoptically worked glass with ground edgesand ishighly polished. A concave lens has a thinner centre than the edges. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it. The image formed is smaller than the original image. Concave lenses are less commonly used than convex lenses. They are used in glasses to correct vision, and also in torches to spread out the beam of light so it covers a much wider area.
 
Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.