I don't know about your Sony model's wide angle and tele accessories. But I have purchased a wide angle add-on for my Sony DSC V1 several years ago, and it was terrible! The barrel distortion is horrific. It was a complete waste of money. I got a DSLR right after that. So try it out before you buy it, if possible. I bought it online because no one carries them in store.
Just got my sony DSC-H2 but I want to add a wide lens with a telescopic lens. Any advice? I want to be able to take wide and picture at a distance of the grand kids.