Zoom Range Comparison #1:
We did two different sets of zoom range comparisons, both of which were shot in the morning on bright days. The cameras were all set to aperture priority mode and all images were shot at f/8 ISO 200. The shutter speed for the G12 was 1/100 sec zoomed all the way out and 1/50 sec zoomed all the way in. For the LX5 the shutter speed was 1/200 sec zoomed all the way out and 1/50 sec zoomed all the way in. For the P7000 the shutter speed was1/115 sec zoomed all the way out and 1/55 sec zoomed all the way in.
This comparison really emphasizes the vast differences in focal length of each of the cameras. While the LX5 is capable of going the widest, with an equivalent focal length of 24-90mm, it also has the shortest optical zoom range of the group by quite a bit. Both the G12 and P7000 are fairly similar, although the Nikon features a focal length equivalent of 28-200mm, where as the Canon features an equivalent length of 28-140mm.

Canon G12 zoomed out. (Full-Resolution Original)

Canon G12 zoomed in. (Full-Resolution Original)

Panasonic LX5 zoomed out (Full-Resolution Original)

Panasonic LX5 zoomed in (Full-Resolution Original)

Nikon P7000 zoomed out (Full-Resolution Original)

Nikon P7000 zoomed in (Full-Resolution Original)