The Baader Solar Continuum 7.5 nm is a very special solar filter designed to help observe surface granulation and the structural details of sunspots. It has a transmission band around 540 nm and enhances the solar surface contrast and reduces the effects of atmospheric turbulence. It is recommended primarily for photographic observation, but is also a good choice for visual observation. Use only in conjunction with other solar filtering devices (Herschel prism, solar filter, etc.)!
The new 7.5 nm bandwidth filter promises better contrast than ever before.