WC-DC58A (wide angle lens) with S3 IS

Hello! I received the canon wide angle lens with the lens adapter for xmas. This is the first time I have had one, so just been playing around a bit. I was curious if there was some do's and don'ts I should know about? or any tips from those who are experienced.

I was also curious about what the camera actualy does when turning the converter option on/off in the menu. I tried with it on and off and I didn't notice a difference, but they were pretty short range indoor shots.

TIA

i noticed with my a95 and the wide angle that if I was taking indoor shots with the flash the lens created a flash shadow on some of my shots. Dont know if its the same for the s3 and as I dont have a wide angle for my s2