This is the LUMIX G X VARIO PZ 14-42mm / F3.5-5.6 ASPH. / POWER O.I.S. Micro Four Thirds lens (product code H-PS14042E):
Being a m4/3 lens, the equivalent zoom range in 35mm terms is 28-84mm.
Sample Photos and Videos
Impress has an extensive range of full HD (1920 x 1080, AVCHD / .mts formats) video clips and full-resolution sample photos in their review of the Panasonic GF5.
Accessories and add-ons
The filter thread size on the 14-42 X is 37mm, which means you’ll want to be looking at purchasing 37mm filters.
Resources
Official Panasonic 14-42mm X page at Panasonic Global.
Related
Panasonic lenses — Main page.