4-90903-20 Lens – Double-Convex Glass, 38mm Diameter, 15cm Focal Length – Optical Physics Lens for Labs and Classrooms – Pack of 20 Lenses

This double-convex glass lens is precision-crafted from polished optical glass, measuring 38mm in diameter with a focal length of 15cm. Ideal for physics demonstrations, optics instruction, and experiments exploring image formation, magnification, and focal length. This pack of 20 high-clarity lenses is perfect for classrooms, labs, and STEM learning environments.

• Superior Optical Clarity: Polished glass reduces distortion and chromatic aberration for clear imaging
• Precision Shaped: Reduces spherical aberration for sharp, focused results in experiments
• Classroom Ready: Affordable, reliable lenses designed for frequent use in educational settings
• Versatile Application: Ideal for refraction, image projection, and focal length demonstrations
• Bulk Pack of 20: Supplied in a set of 20 lenses for group learning or repeat classroom use