Diffraction grating frames – Stock renewal

Our diffraction grating frames stock has been renewed. 500 pieces are now available. If you want to buy some, follow the link to the dedicated page.

For a modest fee, you can participate to the UFO pictures chasing. Those pictures are a good mean to get some characteristics of observed luminous phenomena, like temperature, chemical composition, but also to detect the presence of a magnetic field. The diffraction grating is delivered with a user manual.