ok from the above two posts (Sirrith, SkipD) what I can conclude is its not the FOV that matters for a good composition but the 'actual focal lengths' (whichever format it be) that matters. Cool!
The way I suggest that you think about composition of an image has a few steps to it.
- Find a physical position from which to view the scene that provides the spatial relationship and perspective (relative sizes of objects at different distances from the viewer or camera) of the elements of the scene that suits your imagination of how the image should look.
- Determine what elements of the scene that you want included in the image (how you would frame the scene in the final image).
- Determine the optimum focal length for your camera to provide the field (angle) of view to frame the scene the way you imagined it in the previous step.

