Classroom set camera obscura (8 pieces) + power supply

MACHINE TRANSLATION (not authorised yet)

The package contains 8 cardboard camera obscura models (for self-assembly) with a 15x10x10 cm hole and screen each, a light source (bulb with filament on the base) and 50 sheets of 20x25 cm black paper and allows the whole class/group to learn the principle of contemporary protoplasty in an experimental way. Auxiliary power supply included.