Regardless of the method or instruments used for solar projection, prolonged viewing often overheats both telescope and eyepiece optics . Aim the scope at the sun for no more than ten mintues and then point it away from the sun for a few minutes to let it cool. Also, consider using an inexpensive eyepiece just in case any damage occurs. Faculae are bright patches in the upper photosphere that occur around darker sunspots. Lee Combs Solar Filters Many seasoned solar observers prefer solar filters to projection.
Solar filters allow direct viewing and show the greatest amount of detail.
Positioned correctly, these filters reduce dangerously intense solar rays prior to entering the telescope and your eyes. Never place a solar filter between your eyes and the eyepiece. Solar filters are composed of either nickel-coated glass or aluminized Mylar. Both reduce the sun's visible intensity as well as its dangerous ultraviolet and infrared radiation to within safe viewing levels. Choice of one material over another depends upon the observer's preference.