This introductory bench set allows the basic properties of lenses to be explored.
- Focal lengths are +100 mm,+150 mm,+200 mm, (all convex) and –150 mm (concave)
The optical elements are mounted in robust molded holders that are simply pushed into sockets in the riders.
Each rider can accept up to three elements. The riders slide freely on the aluminum bench until an optical element is pushed in, when the rider locks in place. This eliminates accidental repositioning and allows the entire lightweight setup to be carried around without anything falling off.
The LED-illuminated object is self-contained (powered by an AAA battery, without cables) and generates bright, clear images on the opaque screen. Four high quality lenses are included, all with 50 mm diameter.