Double Concave Lens – 50mm Diameter, Focal Length 500mm

This premium 50mm Double Concave Lens is manufactured from spherical, optically true worked glass, ensuring excellent clarity and reliable performance for school science experiments. The lens is crafted with ground, highly polished edges to enhance safety and precision during practical activities.

With a long focal length of 500mm, this concave lens is perfect for demonstrations involving light divergence, virtual images, and ray diagrams. Its robust construction and accurate curvature make it an ideal resource for teaching optics across a wide range of levels.

Key Features

• 50mm diameter double concave lens
• Made from optically true worked glass for sharp, clear light paths
• FL 500mm (focal length) ideal for extended‑path experiments
• Spherical lens design for consistent optical performance
• Ground and polished edges for safety and durability
• Suitable for a wide variety of classroom optical demonstrations

Ideal for School Science Lessons & Optics Investigations

Perfect for KS3, GCSE, and A‑Level physics lessons, this long‑focal‑length concave lens helps students explore the behaviour of light in greater depth. It is especially effective for:

• Demonstrating light divergence and the behaviour of diverging lenses
• Investigating focal length, image formation, and virtual images
• Constructing and extending optical bench experiments
• Teaching how concave lenses are used in telescopes, eyeglasses, and optical devices
• Supporting ray‑diagram drawing and practical light‑path activities

Durable, precise, and designed for repeated classroom use, this Double Concave Lens (FL 500mm) is an essential resource for delivering engaging and effective optics teaching in school science laboratories.