I was asked what the "big deal" with a LEICA lens is on the FZ-20...
The DC Vario-Elmarit Lens on the DMC-FZ20, DMC-FZ15 and DMC-FZ3 provides:
Auto-focusing and zooming with minimal vibration.
Effortless close ups from an optical 12x zoom lens (equivalent to a 35mm to 432mm).
Mega Optical Image Stabilizer helps prevent blurry images.
Outstanding F2.8 brightness across the entire zoom range.
13 lens elements in 8 groups.
Multi-coating lens process for glare reduction that helps to eliminate image fogging and ghosting when shooting in extremely bright light.
Edge-to-edge image and color clarity thanks to extra-low dispersion (ED) glass (DMC-FZ20 & DMC-FZ15 only).
It's an ED glass len that is multi-coated and made and assembled in West Germany. I just really enjoy not having to change lenses when at a sporting event. With 36-432mm with the flick of a button it's addicting.
I saw a News program on CNN where a photo-journalist had an FZ-20. That speaks volumes.