Hi,
The Lumixes 12-35 f.8 and 35-100 f.2.8 will both fully auto focus satisfactorily. The 35-100 also has the benefit of switchable OIS which is handy if you are moving around. I would however recommend using the area selection mode wherever possible for targetting your subject. These lenses are not cheap but they are fairly wide constant aperture and together, represent a formidable kit, especially for the shallow DOF shots at full extension- magic!
Cheers!
Rod
