There are 5 cameras to locate in the game. (NOTE: You cannot access level 2 or 3 until you are done with work section of level 1.)
Level 1: To the left of the elevator
Level 1: Near the ramp up to the church
Level 2: Near the mail box
Level 2: On the way to the immigration office
Level 3: On the left side
After finding all 5 cameras, go to the Church on Level 1. Go forward and Convert.
Watch the video for the full game walkthrough: