Just got this camera! I'm looking to poduce photos as seen on lomography.com In regards to vignetting, i'm wondering how to enhance that effect on this camera? Also what films would you recomened? Can you add a fish eye lens onto this camera and where can these be purchased from? Plastics ons pref. Also under/over exposing, how does this effect the final image with this camera? Very new to photogrpahy, i dont know much!