The Eyemo that his father gives him is the one on the shelf in his darkroom. But I want to know how his father knew it was out of focus when Mark's step-mother started to film him.
And when Mark's filming Dora at the start he has a clockwork camera under his coat. But how does he prevent Dora from hearing the clockwork and more importantly, how does Mark keep it centred on Dora and keep it in focus as he walks up to her? If she saw him fiddling with something under his coat as he approached, wouldn't she be suspicious?
No camera expert, but I assumed Mark's mom was looking though the lens and saying to the father that it was out of focus, hence him coming back and fixing it. There isn't sound for that, so we can't know for sure, I guess.