Digital Concepts Platinum Series 58mm 2x Telephoto Lens

I was very disappointed with the quality of the pictures using the lens on my Sony H2 camera. At full telephoto length, the pictures have a lighted haze around the image at the center of the picture. I have tried experimenting somewhat, but have been...

This converter works great with my "Canon EF-S 18-55mm f/3.5-5.6 USM" making it a 36-110mm lens, but when I try the 2x converter with my "Canon EF 70-300mm f/4-5.6 IS USM" the lens isn't able to focus on anything. Instead, I recomend a "Bower MC4 2X AF...