Below are test images taken with the Kenko KNW05Hi WA converter and also images with the Sony .7 adapter and the Century 2X teleconverter. The images are all of a resolution test chart. For each of the three lenses there are two shots: a full wide (for the WA converters) or a full zoom (for the 2X teleconverter), and a "half-zoom" image. For comparison, there are also three shots using just the internal ("STD") lens with no converters.
As I recall the aperture was f3.4. These were collected as interlaced video and a single frame of that video was transferred from my Casablanca to the pc using a field-by-field transfer program to become an interpolated frame image in the pc.
The light was basically indirect skylight through the north-facing picture window of our "Arizona room" (in Tucson). They were done with auto white balance.
All of the collections were done with some haste to get generally quantitative measurements. I wouldn't consider them totally scientific for some of the factors... [color balance] For example, as I moved the vidcam-test target positions to account for the varying focal lengths, I was far from rigorous in assuring that all other test conditions were re-adjusted to be constant.
courtesy of Carroll Lam (cassie at dakotacom net)