It covers 35mm, but it doesn't have an aperture. I guess it would be a little awkward to use.
Its main advantage is resolution, and you'll see that only in extreme enlargements, something like a 30x40" print. Film grain will be more of a limiting factor there, unless you shoot microfilm.
EDIT: You can read this
photo.net thread, where Kornelius Fleischer of Zeiss states how they use the S-Biogon at the Zeiss lab: extreme enlargements for performance demonstration purposes. For pictorial applications I guess it would be overkill.