Raynox HD 6600PRO 55 - Converter

I wasted a lot of money for this lens. I bought this lens for our Arizona trip to get some great shots of the Grand Canyon. I have a Lumix FZ50. I tried every conceivable setting and had vignetting in EVERY shot. I also did the conversion lens...

I have now tried the Raynox HD-6600PRO55 with two cameras: 1) Sony Alpha 100 with 18-70MM zoom lens. Two main points, the 18-70 zoom is already a reasonable zoom providing a 35mm equiv. of 27mm. Adding the Raynox adapter, one can only get a little...