Circular aperture diaphragm, durable metal mounting and multi-coated lens elements Based on the Micro Four Thirds System standard The new lens system uses four aspherical lenses and two ED lenses to achieve dramatic downsizing despite its powerful 10x optical zoom. The filter size is 62mm. Panasonic's Mega O.I.S. (Optical Image Stabilizer) suppresses the blurring that is commonly caused by hand-shake The new lens allows use of the advanced contrast AF system The Lumix G Vario HD 14-140mm/F4.0-5.8 ASPH./MEGA O.I.S. as a new member of the Lumix G Micro System. The new Lumix G lens incorporates an inner focus direct-drive linear motor for focusing, which enables smooth, silent operation of its fast and accurate contrast AF system, for use in both photo and movie recording. Adopting the Micro Four Thirds System standard, the new lens offers a wide and long zoom range of 14-140mm (35mm camera equivalent: 28-280mm) to suit a large variety of shooting situations, from scenery to portraits or telephoto shots, in a surprisingly compact and lightweight body.
I use this lens on my GH1 and sometimes on my E-PL1 and it's simply fantastic. The fact that it gives you such range and operates silently when you want to take movies is a great combo.It's been rated to be among the best in super zoom lenses equal or better than the top offerings from Tamron and certainly better than the Nikon and Canon equivalents according to DPReview. From my real world results, I have to agree 100%.I do wish it was a little lighter, but it's still not bad..