1 Set 5/10cm Focal Length Double Convex&7.5/10cm Focal Length Double Concave Len
Double concave lenses are used to disperse light. The double convex lens is a type of lens that is thicker at the center than at the edges and is used to gather light. They can make telescopes, suitable for a variety of applications, including scientific experiments, photography, and optical instruments.SpecificationColor: TransparentMaterial: GlassDouble Convex Lens1# Focal Length: 5cm, Diameter:30mm / 1.18″2# Focal Length: 10cm, Diameter:40mm / 1.57″3# Focal Length: 10cm, Diameter:50mm / 1.97″Double Concave Lens1# Focal Length: 5cm, Diameter:30mm / 1.18″2# Focal Length: 10cm, Diameter:40mm / 1.57″3# Focal Length: 10cm, Diameter:50mm / 1.97″Packing List: 6 x Glass LensAdvantageMade of quality glass that is durable, scratch resistant, and provides excellent optical performance.