Question

How to create a camera shutter animation (Example: shutter .gif animation) and how to make it work for different screen resolutions?

Thanks. Uli

Answer 1

What you want is not the shutter, but the diaphgram. Building and animating it like a real one works should be pretty easy;

Essentially there is a set of triangles attached to the frame at one of their corners, and are then rotated inwards to decide the aperture size.

http://en.wikipedia.org/wiki/Diaphragm_(optics)

Edit: I made a simple flash file to demonstrate the effect.
http://dl.dropbox.com/u/340238/share/aperture.fla

Edit 2:
For dynamic placement;

dummy.x = stage.stageWidth / 2;
dummy.y = stage.stageHeight / 2;
var stageSize:int = (stage.stageWidth > stage.stageHeight ? stage.stageWidth : stage.stageHeight);
displacement = stageSize * K + M;  //Where K and M are constants that you might have to experiment a bit to get. My guess is K = 1, M = 100

You would also have to increase the size of the triangles to match.