Conventions of film openings

Judging by the all of the film opening I have watched, I have noticed that they all seem to follow a particular, same pattern: all starting with introducing the Production and Distribution companies behind the film first. 

After introducing these companies, the films then tend to carry on to introduce the film director. 
In the film opening of 'The talking of Pelham 123' a perfect example of this is presented:

A 'Classic Opening' is then usually used: a 'classic opening' can be described as an opening of a film that follows the particular pattern:

The Thriller Psycho uses a classic opening:

First the actors/actresses names are presented.










 Then a wide shot is used to reveal the entire area to the audience.

The camera then, focuses on a particular,  bulidng/ place that will then be revealed it be significant to the movie later on, where the first scene will be shot in.

Next the camera zooms into the building, and focuses on a particular part of that building such as a window or a door.












Finally, the main character/characters are then introduced.











In the film 'Unknown' however, the opening is, can be argued, the complete opposite of the 'classic film opening' as the movie starts with a view out of the window, then the camera zoom compeltely out to see the room, the area, or place where the main character (the protagonist) is then displayed.  Afterwards, we are then plunged straight into the narrative. 

Also, another film opnening that I found to be quite different from the others was the opening of 'One Hour Photo'. it's opening being a very slow, gradual one, which, all the while, builds tension for the audience. 

As with all film openings, background music is played significantly and is an essential part of the opening as it sets the tone, initial idea to the audience of what type of genre the film is going to be.