Powershot A200 - Picts from far objects

[Bruno Fontes]

When I'm taking some picts from far objects, sometimes in the pictures I can see some circles... I'd like to know what are these circles and what can I do to never see them again!

It still not happen with me, but with a friend using my camera. I don't know if he tried to use any cam option to take the pics or not.

Can you help me?

Look this:


I and my girlfriend



Thanks in advance.