United Scientific DEMO75 Glass Demonstration Lens Set, 6 Pieces, 75mm Diameter

Eisco Labs 6 Piece Premium Optical Glass Lens Set, 50mm Diameter - 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL)

United Scientific LCV108 Glass Double Convex Lens, 100mm Diameter, 200mm Focal Length

American Educational 6 Piece Glass Lens Set

Eisco Labs Double Convex Glass Lens, 75mm diameter, 200mm Focal Length

2 pack - 8.3" x 11.75" LARGE PREMIUM GRADE Fresnel Lens Unbreakable FULL PAGE Magnifier - Fire Starter • Solar Oven • DIY Projection TV PLANS Classroom • Outdoor EDC Survival Kit Bushcraft

A&M Film and Photo Photography Prism - Premium Quality Triangular Optical Crystal Glass - Includes Microfiber Bag & Bonus PDF Prisming Guide

Optical Glass Lens Set - 3 Dbl Convex, 3 Dbl Concave, 75mm Dia - 20, 30, 50cm FL

Eisco Labs Equilateral Acrylic Prisms (1"/25mm sides), Set of 3 Prisms - 1" (25mm), 2" (50mm), 4" (100mm) Lengths

Amlong Crystal 8" Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 200mm

Polarizing Film Sheet - set of 10, Model: 93493, Gadget & Electronics Store