Isis said they had a camera in their ship.
You have to return to the craters, where Seth interrogated Totel earlier. The giant crocodile, Sobek, is guarding the ship.
This is the low-spoiler guide for "Getting the camera" puzzle in Mutropolis. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.