Thanks stansmith! I also think that the depth of field in the last picture isn't that nice. This was actually a try to salvage a picture that went totally wrong. As I said, the ND filter was really bad and made a lot of artefacts in the picture. I couldn't really get rid of the artefacts, so I decided to add a fake depth of field to make the effect less visible. Now it looks more like an Instagram filter, so I guess I'll have to think of something else for my next edit...