Comprising wooden base board with one meter scale divided into mm, all the components have the same optical centre height provided with following accessories: White face object and receiving screens each 150 x 100 mm, with aperture, mounted on wooden base with an index mark. Plane mirror 150 x 100 mm mounted. Lens holder wooden V shaped. Needle mounted in a wooden rod, on base. Candle holder on base.

Comprising wooden base board with one meter scale divided into mm, all the components have the same optical centre height provided with following accessories: White face object and receiving screens each 150 x 100 mm, with aperture, mounted on wooden base with an index mark. Plane mirror 150 x 100 mm mounted. Lens holder wooden V shaped. Needle mounted in a wooden rod, on base. Candle holder on base.