The first slide is to test. So it was at least for me. I mean that the film to some possibly only dog Ertel mm is too large. If you're not very careful, the film rests on the silver edge of the phone, and then you do not get off the bubbles on the edge. But if you have a very steady hand and the tip followed to mount the film as far as possible in the bathroom and previously run a few minutes warmens water as this pulls the dust from the air, you can see the film like a second skin on display bring. The 2nd sheet sits perfectly with me in any case. Before mounting vlelleicht repeatedly OOOOMMM and Chaka think you can do it. :-)).