On the wide angle front, I am still deciding what to do, I purchases a cheap w-20 and have used it with the wide angle port on the ikelite housing, and there is no vignette at 35mm (x .56 effective) which gives a nice wide view, and is super fun, but the image quality is lacking, I think I will try the new inon lens soon. I totally see why people love wide angle lenses tho... it is addicting, as soon as i screw it on it stays on for the rest of the dive/snorkel it seems. But I am new enough to diving that I am still trying to obtain really nice macro shots, and am loving tracking down new Nudi's (this was our first Tom Smith's today). So the dyron is a lot of fun.