Lens, double convex, 500mm f/l

All our lenses and circular mirrors are 38 mm in diameter. The focal length (f/l) is noted for each.

All our lenses and circular mirrors are 38 mm in diameter. The focal length (f/l) is noted for each.

All our lenses and circular mirrors are 38 mm in diameter. The focal length (f/l) is noted for each.

A set of six 38 mm diameter acrylic lenses that includes one each: double-convex, plano-convex, concavo-convex, double-concave, plano-concave and convexo-concave.

All our lenses and circular mirrors are 38 mm in diameter. The focal length (f/l) is noted for each.

Set of six glass lenses used to demonstrate optical properties.

Use these fine mesh iron filings to show magnetic fields of magnets! Look below for additional experiment ideas, the iron filings formula, formula weight, and more.

These aluminum weighing boats or weighing dishes have multiple lab uses.

Use this DIY telescope kit to explore the science of some of the earliest telescopes! Build a single, simple refracting telescope & study the included detailed guide to learn different aspects of basic astronomical viewing.

Two 3" medium-strength Alnico I bar magnets with ends marked North and South.