Solar Filters ULF-50

Universal Solar Filters (ULF) are cardboard filter kits for safe solar observation. They are based on the SolarLite Filter by Thousand Oaks. After assembly, the filters can be attached to the lens. They then attenuate the sunlight so far that a safe view of the photosphere with its sunspots is possible.

ULF-50: Fits most camera lenses with an outer diameter of up to 69 millimetres. For smaller outer diameters, the tabs should be folded inwards to grip the lens.