Many threads related this adapter, found using "Search".

Thanks Ken for your concern.

But no one seems to have used the 16:9 converter. There were lot of talk. But no real information about it. Atleast I could not even find out whether the converter covers the entire focal length range or not.

There's volumes written about it on this site and adamwilt.com. In short, yes it covers the full focal range, although it's tough to get it in focus at maximum zoom. It provides a much higher resolution picture, but only if you take care to administer it properly, meaning: bring along a high-res CRT field monitor, and keep the f-stop in line with the zoom setting to deliver maximum sharpness. Adam Wilt created a chart that shows what the maximum opening is, relative to the zoom setting, to insure maximum sharpness.