These lenses are the Holy Trinity of Panasonic m4/3 lenses at the time of this post. The 12-35 f2.8 and the 35-100 f2.8 are the fastest zoom available for the m4/3 system right now. The equivalent lenses on 35mm format are the 24-70 f2.8 and the 70-200 f2.8. Put these on the G5 and you have a really wondeful system that covers 95% of all situations. The G5 hasn't had much attention because of the Olympus OM-D but I can tell you here and now that it's a fine camera. There is also the Panasonic GH3 to consider but I see it as more of a movie camera and that is why I went for the G5. Price was also a major factor for my choice.