The sun projector
This handy device allows multiple people at once convenient and completely safe observation of sunspots, planetary transits and eclipses. A solar filter is not needed, because the eye is only thanks to the sophisticated look of a projected image of the sun. The size of the solar image is either 75 or 55 mm and can easily be viewed at right angles to the incident sunlight - very handy when the sun! The optics consists of a two-lens glass achromat with 30 mm diameter and 250 mm focal length, which can be in five stages dimmed down to 12 mm, an interchangeable lens with two convex mirrors with -10 and -14 mm focal length and a flat mirror made ??of acrylic glass. The sun projector is very easy to use: He sits on a Dobsonian base and can be adjusted to any height between 0 ° and 90 °. Two integrated quadrants that allow for the determination of the altitude of the sun. The sun projector is only 20 x 20 x 25 inches tall and fits into any book shelf. Stamped kit made ??of sturdy cardboard 350g, lovingly crafted in gold print design.