Any one used the Fujinon S20x6.4BERMHS 1/2" Professional ENG 20x Zoom Lens with 2x Extender with the 350 XD HD Cam. Would that be a decent lens for that camera. If not what would be a good 20X alternative lens

I did tests with that lens while I was lens shopping.

Short answer: It will pass an HD image in most circumstances, but give you magenta/green fringing in most wide open/longer focal length circumstances as well. It's better stopped down to at least a 4.

In other words, it will get you by for a little bit if you have money issues, but not recommended for long term use...

This is the situation with most industrial-level 1/2" lenses on this cam.

what would be an alternative lens that doesn't cost as much as the camera body